OPINION: SA’s construction sector is in ICU. Here’s how government can help

Like most sectors of the economy, the South African construction sector has been struggling prior to the lockdown instituted by government in response to the Covid-19 pandemic. This restriction on almost of all projects further pushed already struggling construction companies down the cliff.

All comes against the backdrop of well-known industry issues such as declining government infrastructure spend poor payment practices within sector’s supply chains and more importantly, the broken industry operating model that is no longer fit for purpose.

This declining trend in public infrastructure spend is largely due to municipalities and state-owned companies substantially reducing their spending over the past few years. Transnet, Eskom and several major state-owned companies have struggled to access capital markets to finance capital projects and infrastructure programmes.

Most municipalities have been consistently underspending on conditional infrastructure grants and are they are not collecting enough revenues to finance their capital budgets. The same trend is visible in infrastructure spending as a percentage of GDP. Government can change this.

For instance, without even lifting a finger, the government can consider practical and actionable strategies already presented and tabled by the industry.

In response to Covid-19, the construction sector has since formed a Construction Sector Covid-19 Task Team, currently comprised of over 30 organisations representing major suppliers, contractors, regulators, professional associations and built environment professional services firms. This Task Team has since worked with government to develop an industry-specific Covid-19 Construction Health & Safety Protocol. Furthermore, the Task Team has submitted a comprehensive short to medium term plan government of actionable reforms to help the sector recover.

This initiative shows that the construction sector is already working together to respond to the impact of the Covid-19 and ensure sustainability of the industry over the coming weeks and months, as well as to enable it to play a full part in South Africa’s economic recovery as the global search for vaccine progresses.

However, the sector also needs support and a clear commitment from government expedite various infrastructure policy reforms.

1. A predictable and reliable long-term infrastructure pipeline

A forward-looking pipeline of planned projects and programmes of economic and social infrastructure is urgently required to help construction companies understand which infrastructure investments government is currently prioritising. By publishing the pipeline, the government will help provide visibility, knowledge and understanding of where infrastructure investment is being made and by whom. Publishing projections of longer-term infrastructure investment will boost market confidence and will help the sector with business planning. This is important because the 18 Strategic Infrastructure Projects (SIPs) which were coordinated by the Presidential Coordinating Infrastructure Commission established during the Zuma administration lacked transparency and to this day no one has a clue about their progress. The recent announcement that the Presidency will host the inaugural Sustainable Infrastructure Development Symposium is a step in the right direction.

2. A single government body to coordinate infrastructure planning

The government should establish under the Department of Public Works and Infrastructure an infrastructure planning and coordinating body that will combine fragmented efforts and infrastructure related work currently done in different government departments. The Budget Facility for Infrastructure within Treasury, the GTAC Capital Projects Unit, the Presidential Infrastructure Coordinating Commission within Trade, Industry and Economic Development, the Public-Private Partnerships Unit within Treasury and ultimately the newly established Presidential Office for Investment and Infrastructure led by Dr.Kgosientsho Ramokgopa should all be merged into a single entity will coordinate all infrastructure planning and coordinating efforts of national, provincial, local government and major state-owned enterprises. This has obvious benefits for the sector. The current level of fragmentation is problematic and wasteful. The lack of transparency by DBSA on the R100bn Infrastructure Fund is also concerning.

3. The use of innovative infrastructure procurement delivery methods

Government should also commit to moving away from the unsustainable transactional and cost-driven procurement of infrastructure and instead embrace the creation of value-driven, collaborative procurement methods that can deliver investment programmes that secure the outcomes demanded by clients and the public. The use of alliance contracting, integrated project delivery and design-build procurement could help address the gaps and failures presented by the current traditional construction procurement delivery approach.

The myth that lowest cost equals best value only survives because of the lack of best value options to compare it with. Furthermore, the processes of designing infrastructure, obtaining tenders, administering contracts and dealing with claims all incur transaction costs, management costs and overheads down the supply chain. These costs are embedded in every price submitted by tenderers and in the final price paid by the owner. The construction industry shows little interest in measuring these costs in a consistent manner and this lack of transparency. Government can change this.

South Africa needs high performing infrastructure. Without it we have little hope of improving the productivity of our economy. Without an improvement in productivity, we will not be able to secure the quality of life demanded by our growing population. Yet the model we use to deliver and operate much of our infrastructure is broken. Too often it produces assets and networks that are expensive, perform poorly and fail to exploit the advances in technology that are transforming other industries. Too often the supply chain that delivers our infrastructure seems locked into a cycle of low margins, low investment and dysfunctional relationships. Covid-19 has presented our government with an opportunity to change this.

By Mr, Ronnie Siphika is the Chief Executive at Construction Management Foundation and member in the Construction Sector Covid-19 Rapid Response Task Team.

Source


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About Sasha Anderson

Millennial Mom + wife living the hash-tag life. Remember: If You Fail - Fail Forward

4 of the Biggest Green Energy Projects in the Eastern Cape

4 of the Biggest Green Energy Projects in the Eastern Cape

Green energy is becoming very popular over time and more green energy projects are being developed almost every day. Going green is defiantly the trend in today’s era.

Something pretty awesome to think about is that the existing investment in South Africa’s sustainable energy projects totals to R142 billion, almost five times what SA paid for the 2010 FIFA World Cup. I can defiantly believe this as I am a Regional content researcher in the projects department and the amount of sustainable energy projects I research is bizarre.

I want to tell you a bit about some of the biggest green energy projects in South Africa.

The first largest wind farm in South Africa is the Cookhouse Wind Farm. This wind farm comprises 66 Suzlon S8 wind turbine generators with a capacity of 135.8 MW. The cost of this wind farm was an estimate of 2.4 billion. This wind farm is located just outside of Cookhouse in the Eastern Cape.

Coming a close second is the R2.9 billion Jeffreys Bay Wind Farm that comprises of 60 turbines. Something quite awesome about this windfarms turbines is that if the wind blows too strong, at around 25mps, the turbines break automatically and then rotate to 90 degrees. Pretty nifty I would say.

Amakhala Emoyeni which means “aloes in the wind” in isiXhosa is Third on my list. This wind farm is located near Bedford in East London. This R3.94 billion wind farm comprises of 56 Nordex N117 / 2400 turbines with a capacity of 2. MW each.

Last but not least is the Enel’s Gibson Bay Wind Farm, with an estimated cost of R2 billion is located in the Kouga Municipality in East London. this wind farm has a capacity of 108.25MW.

Judging by the price tags on wind farms looks like going green is good for the environment and for your wallet.

Until we meet again.


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About Sonet van Wygaard

I started working at Leads 2 Business in 2014. I was part of the Tenders Africa team and have now recently moved to Private Projects. I love every second of it!

NHBRC regional offices to resume, satellites phased in

 

While the National Home Builders’ Registration Council (NHBRC) provincial offices will resume full service operations next Monday, 8 June, satellite offices will be phased in gradually.

The satellite offices are in Tzaneen, Witbank, Bethlehem, Thulamela, Mafikeng, Klerksdorp and Newcastle.

Developers, contractors, home builders and housing consumers, who need to interact with the NHBRC, are urged to only visit offices when it is absolutely necessary for the collection of certificates (i.e. registration and enrolment) and to complete technical assessments.

“We further encourage those who need to submit necessary supporting documents to do so from the safety of their homes or offices via our new emailing list,” read the statement.

The new emailing list is:

1. Gauteng: GP-online@nhbrc.org.za

2. Western Cape: WC-online@nhbrc.org.za

3. Eastern Cape: EC-online@nhbrc.org.za

4. Free State: FS-online@nhbrc.org.za

5. North West: NW-online@nhbrc.org.za

6. Limpopo: LP-online@nhbrc.org.za

7. Mpumalanga: MP-online@nhbrc.org.za

8. KwaZulu-Natal: KZN-online@nhbrc.org.za

9. Northern Cape: NC-online@nhbrc.org.za

The NHBRC said each of its offices has established a Covid-19 task team to ensure the continued safety of employees and customers. The council urged all those visiting its offices to cooperate with the measures put in place.

“As an agency of the Department of Human Settlements, we support all the national Covid-19 interventions aimed at providing citizens with dignified accommodation and access to clean water, thus contributing to reducing the risks of infection associated with overcrowding,” said the building council.

Source


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About Sasha Anderson

Millennial Mom + wife living the hash-tag life. Remember: If You Fail - Fail Forward

Activation plans for the Construction Industry post COVID-19

At the end of April, the Construction COVID-19 Rapid Response Task Team (CC19RRTT) submitted proposal medium-term plans for the development and construction industry post-COVID-19.

Below is a synopsis of the proposal. The full proposal document is available below.

Short-term interventions include re-activation of construction sites and processes with a focus on health and safety measures to assist the safeguarding of construction workers and suppliers.

Medium and longer-term interventions are required to support the built environment and construction sectors to ensure contributions to economic recovery and growth.

The Public Infrastructure builds, together with private sector investment, plays a key role in creating employment opportunities in the sector and its regulation determines the successes or failures of the Built Environment sector.

The property development sector, both private and public, is responsible for fixed capital investment that addresses both social and market needs and, importantly, reflects medium-to-long term confidence in the future of the country.

Government contributes towards public infrastructure builds and regulates the sector through various entities, guidelines and provisions which play a key role in creating employment opportunities in the sector.

The Covid-19 situation happened at a time when the entire building industry was in a crisis, bringing focus and urgency to the need to review some of the regulatory framework and procurement environment for which Government is responsible.

More than two-thirds of any development process is currently being spent on obtaining statutory approvals, twice as long, if not longer than it takes to construct a typical development. Construction can only commence once statutory approvals are in place. If one were to support the construction industry, one cannot but address duplication of statutory processes and delays in the statutory approval phase of a project. Such delays also inhibit any national economic turnaround.

The submission is structured along with the following main themes:

  1. The need for the alignment and merging of all statutory approval processes into a single application process.

  2. The empowerment of qualified and registered design professionals to self-certify their work, or alternatively peer certification on a rotational basis.

  3. Restructuring of public procurement processes under the guidance of the quantity surveying, architectural and engineering professions who are responsible for procurement processes in the private sector daily noting the need to acknowledge the broad intent of the current PFMA & MFMA’s. The shortcomings of these policies in the procurement of professional services also should be acknowledged and reviewed.

  4. Establishing a supply chain environment which differentiates between the procurement of goods and procurement of professional services.

  5. Creating a regulatory framework which supports the industry to be sustainable rather than contribute to its collapse.

  6. Increase public-private partnerships for the provision of infrastructure projects.

  7. Facilitation of development finance to ensure that more projects get to the bankable feasibility stage.

The medium-term plan calls for a fundamental change in government and public engagement in order for more construction projects can take place, thereby delivering all the benefits that the construction industry can achieve as an economic multiplier in terms of creating employment ultimately resulting in the recovery and the future of the country.

The construction industry is paramount in achieving any future economic growth and the proposed plan will most certainly assist in its activation post-COVID-19.

The Full Proposal Document

cc19rrtt_medium_term_proposa

Source: ASAQS


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Millennial Mom + wife living the hash-tag life. Remember: If You Fail - Fail Forward

Abandoned Construction Projects in Africa

posted in: Construction Chat 0

An abandoned construction project can be defined as a project which has been 1) totally abandoned, or 2) indefinitely delayed. Abandonment may happen at any stage of a project life-cycle and incur a significant amount of loss.

There are various reasons why construction projects are abandoned:

  • Inadequate planning
  • Inadequate finance
  • Inflation
  • Bankruptcy of Contractor
  • Variation of project scope
  • Political factor
  • Delaying in payment
  • Incompetent project manager
  • Wrong estimate
  • Faulty design
  • Inadequate cost control
  • Change of priority
  • Unqualified/inexperience Consultants
  • Administrative/legal action
  • Disputes
  • Natural Disasters

The effects of construction projects are mainly:

  • Unemployment
  • Bad image for government
  • Government sector underdevelopment
  • Slow economic growth
  • Financial institutions lose confidence in the state
  • Discourages investment
  • Loss of revenue by state

Here are a few construction projects that have been abandoned and the reasons:

1. The Ghana-STX Building Project, a $10 billion housing project – The project was supposed to lead to the construction of 200,000 houses in Ghana for over 5 years. From research findings, causes of failure of the project were due mostly to disunity, lack of effective governance and project control. Corruption was also a feature.

2.  Mususu Kalenga Building in Zambia – The structure was built at a cost of K400 million by the Zambia State Insurance Corporation and sold to Royal Lutanda Company Limited at K800 million in 2000. The 11-storey building has remained abandoned for over 25 years. There is no indication as to why it was never completed.


3.    900-1000MW Coal Power Plant at Lamu in Lamu County, Kenya – Kenya’s National Environment Tribunal revoked the license granted to the Power Company to build a coal power plant, due to the companies failure to do a thorough environment and social impact assessment (ESIA) that met the requirements of the law.

4.    Construction of a 20,000 seat capacity stadium in Mongu District in Zambia – The government abandoned its plans for the Mongu Stadium most likely due to lack of funding.

5.    Grand Police Bay Hotel, Seychelles – There was a lot of backlash regarding this project and the government decided to not proceed with its plans.

6.    Al-Noor Tower, Casablanca, Morocco – The 540m high skyscraper was to include a luxury hotel,  offices, apartments, an art gallery and a luxury arcade of shops. The client, Middle East Development LLC decided to not proceed with the development stating that a tower if this size was not an appropriate project for Morocco at the moment.

7.    Hope City – A mixed-use development in Ghana – With a downturn in the economy, relocation of the project, and erratic power supply, work on the project never got underway. RLG Communications, the Ghanaian tech company which was supposed to be spearheading the project was itself caught up in various scandals. To date, nothing further has happened with this development.

8.    Pinewood Uranium Project, Tanzania – Kibo Mining (AIM: KIBO; AltX: KBO) announced on 24th February 2017 that it will cease activities at its Pinewood and Morogoro uranium coal and gold projects with immediate effect. The reason behind this strategic choice is in that both Metal Tiger and Kibo Mining have experienced considerable success in other projects of their business portfolio and this has led to these interests becoming the absolute focus of each company.

9.    Construction of sewers, roads and infrastructural services for 360 plots in Kazungula Village and at Nnyungwe area in Kasane, Botswana – Government mysteriously abandons the P80 Million tender as works near completion and this sparks corruption rumours.

Sources:
Research Gate – Abandoned
Research Gate – Government
PM World Library
The Gazette
L2B


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About Nadia Milln

My journey at Leads 2 Business all started back in September 2014 as a content researcher in the Daily Tenders Africa Department. In March 2018 I was promoted to content researcher in the Private Project department. I am a fun loving, bubbly person and mom to a beautiful baby boy who is the absolute light of my life.

How Drought and lack of Water effects Construction in the Western Cape

A drought happens when a region receives less than average rainfall. Unlike the simplicity of this definition, the actual scenario is devastating.

Droughts don’t just affect the plants or livestock of a region, but they also pose a great threat to human lives. It is regarded as a natural disaster considering the damage it does to the entire ecosystem. Climate change has been a major factor in the creation of droughts in several parts of the world. As the earth is heating up, many regions of the world are experiencing less precipitation and droughts are becoming more common than ever before.

In some regions, such as the Western Cape, the country’s second-largest province in terms of economic contribution, the drought continued into 2017. These droughts are associated with climate change – the effect of human behaviour on the planet’s temperature. Whether from external sources (rain, groundwater, flash flooding, etc.) or internal sources (water escape or fluid release), water damage has a significant impact on a construction project. In addition to the physical loss, water damage usually impacts the project schedule. In this era of increasing deductibles, accelerated schedules, and contract penalties, even relatively small water incidents can result in large losses. Although higher deductibles generally reduce insurance premiums, contractors may face an unexpected expense when water damage occurs. Water damage incidents may also harm the contractor’s ability to obtain repeat business from an unhappy owner.

So, what can you do about it? It’s all about prevention. The best protection against water loss is proactive measures to avoid water damage.

Water is health, Water is life

 

Sources:
Business Tech
Green Cape


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About Chantélle Naudé

I have been with Leads 2 Business for 9 years, working in the Leads 2 Quotes department. Mother to two beautiful daughters.

Green Buildings in the Western Cape

When I think of a green building, a beautiful little stone house (not so sure why stone, but hey), that has ivy crawling up the one wall, with a little veggie patch in the back-garden with children running around. A water tank catching rainwater and a windmill somewhere doing whatever it is windmills do, but there is a little more that goes into being a “green building” than a few self-sustainable items.

So, what is a “green” building? A building can only be classified as being “green” if the project team decreases or eliminates as much negative impact that building would have to the environment, from the design right through the construction and operation of the building. The idea is that the build then has a positive impact on the climate as well as the environment around it, which in turn improves our quality of life.

Now that we know what a “green” building is, we need to know what aspects that make up the “green” building. Many different aspects can make a “green” build, well “green”. So, what do these aspects include? Well, the building must have an efficient way of using energy this being water and other resources. “Green” building use more alternative type of energy like solar energy or wind energy. The next aspect of a “green” building is that the materials used during the construction and finishing of the building are non – toxic, sustainable and ethical. Another aspect that makes a “green” building is the waste from the building and what is done with it. Green buildings make sure that they minimise pollution as well as implements the practice of reusing and recycling.

The last aspect that needs to be considered is design. The look and feel of the building should be one with the environment around it. What this means is that not only does the building aspects that make a “green” build “green” needs to come into play like alternative types energy and so on, but also the actual look of the building as well. The building can’t be this lump of concrete and steel in the middle of a plot of land or removing half of the earth to construct a new office park. A “green” build goes with the land, following the contours and changing the design to suit the land and not the other way around.

The best part of a “green” building is that any building can be “green” whether it is a private home, an office building, even a school as long as it includes the aspects that we have already spoken about. It is also important to note that different countries do have different characteristics that would be used to shape their approach to green building such as unique cultures and traditions and even economic and social priorities.

South Africa has a few “green” buildings that the country can be more than proud to boast about and thanks to Green Building Council South Africa, buildings can even receive a rating on how green their buildings are. This rating system recognises brilliance in the sustainable design in South Africa’s “green” buildings. Their Six Star rating is the highest rating “green” building can receive and is only reserved world-class projects. The Green Building Council South Africa has 6 different star ratings. The rating starts at 1 Star and goes through to 6 stars as already stated. So what do these stars mean? 1-2 star is on the journey to being a better, greener building. 3 star is good practice. 4 star is the best practice. 5 Star is South African Excellence and 6 star is World Leadership.

Below is a list of just some of the “green” buildings that can be found in the beautiful Western Cape Province of South Africa.

The first property that we will be looking at is the Black River Office Park. The building is situated in Cape Town and is made up of 13 buildings that boast green credentials and solar installations. I mean how beautiful are those lines and all that glass would let in so much natural light meaning that less electricity would need to be used. The buildings in the office park arrange from 4 through to 6-star ratings.

The next property that we are going to have a look at is the Convention Tower. The tower is located in Cape Tower right next to the Cape Town Convention Centre. The tower has been awarded a 4-star rating from the Green Building Council South Africa. Many features helped this building reach its 4-star rating.

The next building, we are going to be looking at is in the industrial sector of Cape Town. For me any industrial area has always been a huge source of carbon emissions for any country, so to find out that the Golf Air Park II has been designed to achieve a 4-star Green Star SA Industrial rating really made my heart happy.

The next building is a gem found in Cape Town’s Central Business District (CBD). The Towers are a building complex that has a 40-year history with the city’s CBD which has been redefined and re-imagined. The building boasts new floor plans for their occupants with the façade that removes up to 60% of the UV light as well as saves on cooling and heating costs, boasts energy-efficient daylights and even has energy-efficient LED fins that go around the building that light up by day to highlight Table Mountain and Robben Island and by night the famous Cape Town Landmarks. The building only received a 2-star rating, but it is still pretty to look at.

The next building that we will be looking at is a sophisticated, mixed-used office space for any professional that can be found in Cape Town. So, if you are looking for a chic, urban lifestyle that makes ups the cosmopolitan lifestyle, then the Wembley Square houses the offices for you. I mean, just look at the pictures and who wouldn’t want an office in this place?

The next building, we are looking at is the 35 Lower Long building that is also found in beautiful Cape Town. The building is on the De Waterkant and is close to the V&A Waterfront as well as the Cape Town Invention Centre. The building has received a 4-star Green Star rating. Some of the features include, but are not limited to: “heating ventilation and air conditioning system is a cooled-air system. Making use of minimal water usage” (Anon., 2020). “Hot water supplied via heat pump. The lighting power density for 95% of the UA is less than 1.5W/m2 per100m2. Water closets, urinals and tape fixtures all reduce water consumption. Paints, adhesives sealants and carpets have low VOC emissions” (Anon., 2020), are just some of the aspects of this building.

Our next building is the Head office of the City of Cape Town Electricity. That’s right, their head office has a 5 Star Green rating, how awesome is that? The building has two main sections that are separated by a multi-volume atrium in the centre with office spaces located around it. A series of bridges create various walkways between the different sections on each floor. Some of the features that got this building its 5-star rating including, but not limited to: “Major energy and water uses are sub-metered and controlled by a centralised Building Management System (BMS)”. “Solar panels have been installed on the main roof as well as on all carport roofs”. “A greywater recycling system reduces potable water use for flushing toilets and urinals and water-efficient fittings installed Cyclists’ facilities are provided” and so much more (Offices, 2020).

The next building is one of my favourites, by far. It is a hotel that is situated just 400m from the Cape Town International Airport and can proudly boast a 6-star Green rating from Green Building Council South Africa. The developers wanted to create a building that would be a shining example for sustainability, luxury and convenience all in one. The hotel was designed from below the group up so that the building is as ecological as it can possibly be, a concept that is then followed through its day to day operations and decisions such as waste management, procurement and staff training.

Our next building is has a 4-star rating. The SANRAL Cape Town office building which is conceptually constructed from two interlocking blocks that fall around a full-height central atrium that is in an H configuration. The building has three office levels that are over two mechanical ventilation basement levels. In other words, there are a lot of levels to this building for an office building for just one company.

The last building that I am going to be talking about is The Cape Quarter Lifestyle Village which has a 4-star green rating from the Green Building Council South Africa. The square is an iconic mixed-use which can be found in the heart of the beautiful city of Cape Town.


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About Carmen Van Der Westhuizen

I've been working for L2B since January 2020. I am lucky to be married to my bestfriend. I love a good Braai and spending time with my Family and friends. When I am not working or with those I love, I am planning my next holiday.

What are Desalination Plants and How do they work?

When researching this topic, it seemed to be traditional to quote from “The Rime of the Ancient Mariner” written by poet Samuel Taylor Coleridge in 1797 – 98. Ahem…

“Water, water, everywhere,
And all the boards did shrink;
Water, water, everywhere,
Nor any drop to drink. “

Basically, a bunch of sailors are surrounded by water, but can’t drink it. Because it’s seawater. And they’ll die. But they’re dying of thirst. You can see the conundrum.

Why can’t you drink seawater?

“Seawater contains salt. When humans drink seawater, their cells are thus taking in water and salt. While humans can safely ingest small amounts of salt, the salt content in seawater is much higher than what can be processed by the human body. Additionally, when we consume salt as part of our daily diets, we also drink liquids, which help to dilute the salt and keep it at a healthy level. Living cells do depend on sodium chloride (salt) to maintain the body’s chemical balances and reactions; however, too much sodium can be deadly.

Human kidneys can only make urine that is less salty than saltwater. Therefore, to get rid of all the excess salt taken in by drinking seawater, you have to urinate more water than you drank. Eventually, you die of dehydration even as you become thirstier.”

The earth’s surface is approximately 71% water, which mostly we can’t drink. Approximately 97% of the total amount of water available to us is seawater and 3% is freshwater, most of which is frozen in glaciers and the like. Now throw in pollution and how most of the freshwater goes towards industries, like agriculture; things start looking a bit parched. A bit dry. A bit arid.

With stats like that, desalination is looking pretty good as an option to increase the access to drinkable, usable water.

And with South Africa’s recent and, in fact, ongoing drought/s throughout the country, paying attention to our water (where it comes from and where it goes, and how we can access more); is extremely relevant.

Desalination is the removal of mineral components from a substance. So you can have soil desalination as well as water deslination. Saltwater is desalinated to make water fit for human consumption or irrigation.

The interest in desalination is mostly geared towards the production of water for human use, and besides recycled wastewater, it is one of the few rainfall independent water sources.

The desalination process is an energy consumer though when compared to the relative ease with which water is sourced from rivers, groundwater, water recycling or water conservation. But this depletion of natural reserves or the complete lack of access is its own problem. Desalination processes are either driven by thermal (distillation) or electrical (photovoltaic or wind power), as the primary energy sources.

Approximately 1% of the world’s population is dependent on desalinated water for their daily needs.

Methods

There are many many methods of desalination, which I was surprised by. Each has advantages and disadvantages but all are useful. The methods can be divided into membrane-based (e.g., reverse osmosis) and thermal-based (e.g., multistage flash distillation) methods. The traditional process of desalination is distillation, i.e. boiling and re-condensation of seawater to leave salt and impurities behind.

Reverse osmosis plant membrane systems typically use less energy than thermal desalination processes.

Solar distillation:

Solar distillation mimics the natural water cycle, in which the sun heats the seawater enough for evaporation to occur. After evaporation, the water vapour is condensed onto a cool surface. There are two types of solar desalination. The former one is using photovoltaic cells which converts solar energy to electrical energy to power the desalination process. The latter one utilises the solar energy in the heat form itself and is known as solar thermal powered desalination.

Vacuum distillation:

In vacuum distillation atmospheric pressure is reduced, thus lowering the temperature required to evaporate the water. Liquids boil when the vapour pressure equals the ambient pressure and vapour pressure increases with temperature.

Multi-stage flash distillation:

Water is evaporated and separated from seawater through multi-stage flash distillation, which is a series of flash evaporations.

Multiple-effect distillation:

Multiple-effect distillation (MED) works through a series of steps called “effects”. Incoming water is sprayed onto pipes which are then heated to generate steam. The steam is then used to heat the next batch of incoming seawater. To increase efficiency, the steam used to heat the seawater can be taken from nearby power plants. Although this method is the most thermodynamically efficient among methods powered by heat, a few limitations exist such as a max temperature and max number of effects.

Vapor-compression distillation:

Vapour-compression evaporation involves using either a mechanical compressor or a jet stream to compress the vapour present above the liquid. The compressed vapour is then used to provide the heat needed for the evaporation of the rest of the seawater. Since this system only requires power, it is more cost-effective if kept at a small scale.

Reverse osmosis:

The leading process for desalination in terms of installed capacity and yearly growth is reverse osmosis (RO). The RO membrane processes use semipermeable membranes and applied pressure (on the membrane feed side) to preferentially induce water permeation through the membrane while rejecting salts.

Freeze-thaw:

Freeze-thaw desalination uses freezing to remove freshwater from saltwater.

Electrodialysis membrane:

Electrodialysis utilizes electric potential to move the salts through pairs of charged membranes, which trap salt in alternating channels.

Membrane distillation:

Membrane distillation uses a temperature difference across a membrane to evaporate vapour from a brine solution and condense pure condensate on the colder side.

Wave-powered desalination:

CETA is a wave power technology that desalinates seawater using submerged buoys.

Environmental Impact

The environmental considerations when considering desalination plants (of any size) are very dependent on costs, capacity, type of facility, location, feed water (i.e. seawater, brackish water, groundwater etc), labour, energy, financing and concentrate disposal (i.e. The by-product of desalination is brine. It has to go somewhere.)

So are desalination plants the final solution to our water problems: The upsides are that the methods are effective and well understood. The focus is on preserving natural water supplies, and the ocean is a massive source to draw from, which eliminates any unpredictable factors (i.e. rainfall). In other words, the ocean isn’t going anywhere any time soon. The plants are usually located outside residential areas, and away from the general populace. But for every upside, there are the drawbacks to be considered: Namely, the plants are expensive and the desalination process can be expensive in itself and a huge energy consumer. Greenhouse gas emissions have to be considered, and the disposal of the brine also needs to be worked out to lessen the negative effects on the surrounding environment and there’s always the risk of producing contaminated water.

Desalination plants can vary in size and production capacity, and there’s approximately 10 dotted along the coast of South Africa from the Western Cape through to Kwazulu-Natal. South Africa’s largest seawater desalination plant is in Mossel Bay. It cost R210 million and has a total capacity of 15 megalitres per day (10 megalitres for domestic & other uses; 5 megalitres for industrial).

Desalination can form an important puzzle piece in ensuring that we look after our current water sources, increase supply to those that don’t have access to water as well as work towards ensuring that the environmental factors are mitigated or decreased.

An example of a current Project being researched, please see PPA 21190.

Sources:
Wikipedia Desalination
Wikipedia Water
Veolia Water Technologies
Ocean Service


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About Claire Donaldson

I started working at Leads 2 Business in February 2005, and have served as Head of Department of Daily Tenders from 2007 until the present. I oversee both the Daily Tenders South Africa and Africa Departments.

8 Interesting places to visit in Angola

Angola is a country situated in Southwestern Africa with a vast history of civil war and Illegal poaching. The name Angola comes from the word Ngola, which was an iron object that symbolized kingship among the Mbundu & Lunda people. A holiday in Angola with leave you mesmerised with the beauty of the cities, the tropical forests, Pasture lands and animals. I chose the 8 most beautiful places to visit in Angola.

1. Luanda
Luanda is the modern capital city located in Angola and it overlooks the Atlantic Ocean. The city is densely overpopulated but it has not lost its charm and the uniqueness of the city can never fade away. So when you are in Angola, never forget to visit Luanda.

2. Dilolo Lake
The Dilolo Lake is the largest lake located in Angola. The lake has certain mystic happenings that occur there. Legend has it some supernatural forces seem to cover the entire lake which prevents fishermen from fishing in the lake.

3. The Tunda Vala Fissure
The Tunda-Vala volcanic fissure, where you can climb to 2600m above sea level. The view of a sheer drop to sea level is quite spectacular. This area is perfect hiking. Don’t miss out on this wonderful destination.

4. Benguela
Benguela is a city in Western Angola, capital of Benguela Province. Benguela is one of Angola’s most populous cities with a population of 555,124 in the city. On the 13th August 2014 the Benguela Railway, in Angola, was reopened throughout, between the port of Lobito and the town of Luau. The devastating Angolan civil war, which lasted for 27 years, from 1976 to 2002, forced the closure of the entire railway line, except for the 34 km (21 mile) stretch between the coastal towns of Lobito and Benguela. This region has the friendliest people. There are various beautiful beaches located here. A must-see for every tourist!

5. The Arch Lagoon
The Arch Lagoon is located in Tombwa and is famous for the various rock formations in the Lagoon. This park has more than 2000 stone arches, in addition to more than a hundred soaring pinnacles, massive fins and giant balanced rocks. Do not miss the exotic wildlife species in the area. If you are looking for peace and serenity, Don’t miss the Arch Lagoons.

6. The Lobito
Lobito is a relatively new location and is known for the export and the harbour located in the region. There are numerous beaches situated in Lobito. There are many fine-dining restaurants where you can get a taste of the cuisines famous in the region. Lobito has perfect sunrises and sunsets.

7. Dala Waterfalls
What a spectacular sight to see the water coming down crashing on the rocks is a grand feat. A bridge built below the falls is something which is a place to visit. The Waterfalls capture many hearts of the visitors who give a visit to Angola.

8. Iona National Park
This is the largest national park in Angola. The park holds the best species of plants and animals that one can ever see. The Springbok, The Ostrich, are some of the indigenous species that you can find in the park. These are the best places in Angola which should be visited at least once in a lifetime.

Sources:
Sky Ticket
Travel Tour
Wikimedia
Heritage Portal
PX Here
Britannica

 


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How Climate Change Affects Construction

Many parts of the country and all over the world are experiencing climate change. The weather changes are and will continue to have a prominent effect on the construction industry and the employment rates.

There are four concerns around climate change in terms of the greatest impact it will have on the construction industry:

  • Worker safety
  • Weather-related delays
  • Construction materials design and manufacturing
  • Insurance costs

Journey with me as we explore and investigate The Effects of Climate change on Construction.

Climate change is expected to have an impact on many aspects of building performance. The world’s climate is changing.

We leave little room for error on the construction site, especially if the error is beyond your control. Perhaps one of the most recent concerns is the effect that climate change is having on the construction industry.

According to sources, the global sea level has risen about eight inches in the last 100 years, with the rate in the past two decades nearly doubling, the number of record high temperature increasing, along with increasing numbers of intense rainfall.

With the weather becoming more aggressive and untimely, this can only mean destruction for an industry that relies on weather predictability and clear skies.

Climate change impacts worksite safety with unpredictable rain. Flooding can lead to deteriorating wood and slippery surfaces increasing injuries and high temperatures can cause heatstroke, heat exhaustion and could sadly lead to death. No matter what precautions are taken to protect workers in these harsh conditions, the biggest threat is unpredictability.

Climate change also has an effect on building materials and current structures. Changes in temperatures cause building materials like brick and wood to decay and crack faster.

Construction companies increasingly find themselves facing escalated insurance costs due to project delays, which are related to extreme weather and labour risks. This means construction companies need to increase the costs of the project to accommodate rising insurance costs or stop with certain construction projects due to an inability to afford insurance.

Buildings can be affected drastically by climate change, where in the future there may be the risk of collapse, health breakouts and loss of value as a result of heavy rainfall. Building lifetime is reduced, stronger storms are the greatest challenge and this is a continuous safety risk.

Research has shown that with implications for the future, climate change will have different impacts on different buildings depending on the type, scale, use, construction and location. It is clear that even without the current uncertainties in climate change, science and the potential impacts of climate change on buildings, establishing suitable mechanisms to deal with these issues is also problematic.

In conclusion, the upside of Climate Change, the one thing you can be sure of is that no matter what changes there may be, we at Leads 2 Business will be there to keep you updated.


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About Estelle Pillay

My start here at Leads 2 Business in April 2019 marks a journey so far vibrant and exciting. I function as a content researcher within a dynamic team in the Projects Department, on the other side I am a mother of two beautiful children who bring out the best part of me.

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