Mar 30, 2012
Need for modular sewage plant solution growsBack
Construction|DRC|Engineering|Gold|Africa|Aqua Services & Engineering|Civils|Design|Environment|Flow|Installation|Mining|Modular|PROJECT|Projects|Screens|Sustainable|System|Systems|Veolia Water Group|Veolia Water Solutions|VWS South Africa|Water|Africa|Democratic Republic Of Congo|DRC|Mozambique|South Africa|Tanzania|Uganda|Zimbabwe|Control Equipment|Energy|Equipment|Filter Technology|Flow|Maintenance|Mine Camp Site|Service|Services|Solutions|Systems|Technology Shows|Technology Using Stones|Wastewater Plant Solutions|Wastewater Treatment Solution|Infrastructure|Laurent Schmitt|Power|Valerie Naidoo|Wayne Taljaard|Operations|Clarification Technologies|Exelys Sludge Processing Technology|Filter Technology|Trickling-filter Technology|Uniquely African Water Treatment Technology|Wastewater Treatment
© Reuse this
“It is a known fact that wastewater treatment works are under immense pressure and solutions are needed to assist government and local water authorities.
“We have noted government’s involvement in the issuing of tenders to upgrade sewerage infra- structure, but upgrades are expensive and we are not sure if government has sufficient funds to provide for this,” says VWS South Africa Engineered Systems GM Wayne Taljaard.
The company says its affordable and effective modular wastewater plant solutions have been supplied for use mainly in the mining sector.
The plants have been supplied locally to a mine camp in Mpumalanga, and across the border to mines in the Democratic Republic of Congo (DRC), Zimbabwe and Uganda, as well as to mining projects in central Mozambique and Tanzania.
Domestic Wastewater Treatment
Another project undertaken by VWS South Africa is the design and installation of two 70 m3/d modular civil construction sewage treatment plants for a mine camp site in Mpumalanga. The plants are currently under construction.
Further, it was awarded a contract to supply a 40 m3/d civils-based modular sewage plant to a gold mine in Tanzania. The contract entails plant design, the supply of the mechanical, electrical and control equipment, as well as the commissioning of the plant.
It is due for completion in May.
Uniquely African Water Treatment Technology
This new-generation modular trickling- filter technology is more affordable for less privileged communities, enhancing its popularity in the South African and African wastewater treatment market.
The sewage treatment system screens and removes nondegradable particles from raw sewage. A biological digestion process further prepares sewage for a fixed-film trickling filter, where organic constituents are removed and nitrification and final water polishing occurs. Final solid separation, chlorination and disinfection leave the water ready for use in various processes.
When compared with the old trickling-filter technology using stones, the newer technology shows increased water flow, improved outlet water quality and a higher degree of control, states Taljaard.
He notes that the misconception that this technology is old-fashioned has led to a reluctance to establish trickling-filter technology as a highly effective small-scale wastewater treatment solution.
To overcome this problem, the company is focused on educating the market on the technology and its benefits. This includes low energy consumption, low maintenance requirements and its simple operation, he says.
An Energy Solution
One of the ways in which it aims to achieve this is through the combination of the Exelys thermal hydrolysis sludge process and digestion, where biogas, heat and energy can be recovered from sludge in a cleaner and more environment-friendly recycling process.
The Exelys process breaks down the long chain molecules typical of sludge to enable the digestion to release larger quantities of biogas for energy generation, while reducing overall sludge quantities, explains VWS South Africa municipal engineering director Laurent Schmitt.
The energy generated from biosolids makes it possible for wastewater treatment works to become independent of grid supply and can even enable the supply of surplus clean power to the grid.
The presentations focused on the possibilities of creating value from wastewater for more sustainable resource management throughout the African continent by using modular trickling-filter technology to effectively treat wastewater produced by communities of under 50 000 residents.
One of VWS South Africa’s goals is to focus on energy efficient solutions and securing large-scale municipal treatment works upgrade contracts.
The company suggests that municipalities use the new-generation tricking-filter technology solution as an economical way of upgrading similar existing infrastructure and, in so doing, treating their effluent and overcoming the country’s sewerage infrastructure backlog.
The Exelys sludge processing technology can further help overcome energy shortages and reduce sludge quantities in future.
The standards will include specific criteria for after-sales service and plant production capacity.
Sewpacksa was established in Nov- ember 2010 with the aim of improving the quality and standards within the packaged sewage plant industry.
It regulates the quality of supply, design, installation and performance in the industry and, as an ultimate goal, would like to see all suppliers abide by the Sewpacksa standards with professionalism and integrity.
Association members are currently adhering to standards outlined in the Water Research Commission’s (WRC’s) guideline document for package plants for the treatment of domestic wastewater.
VWS South Africa reports that Sewpacksa’s aim is to have all its members ensuring that their clients are compliant with the Department of Water Affairs’ Green Drop certification requirements.
The Green Drop certification programme for wastewater treatment works is an initiative to ensure that these wastewater treatment works progressively improve their operations. Green Drop status is achieved if the water service authority complies with wastewater legislation and other best practice requirements.
WISA and WRC member Valerie Naidoo states there is a R2-billion demand for modu- lar sewage treatment plants in Africa.
The advantage of being a Sewpacksa member will become obvious during the tendering process for this work in that it will level the playing field, as everyone will be working within the same parameters, says Naidoo.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines (150 word limit)
Creamer Media Senior Deputy Editor Online
Other Water News
Renewable energy has been an official part of South Africa’s exciting technology rollout since it was included in the country’s Integrated Resource Plan 2010 (IRP 2010). Through this, the South African government committed to produce nearly a tenth of our nation’s...
The civils works for the Western Cape-based Saldanha Bay industrial development zone’s (IDZ’s) Wastewater Treatment Works project is under way. The mechanical and electrical contract has also been awarded for the project upgrade, which will increase the capacity of...
Recent Research Reports
Liquid Fuels 2015: A review of South Africa's liquid fuels sector (PDF Report)
Creamer Media’s Liquid Fuels 2015 Report examines these issues in the context of South Africa’s business environment; oil and gas exploration; fuel pricing; the development of the country’s biofuels industry; the logistics of transporting liquid fuels; and...
Road and Rail 2015: A review of South Africa's road and rail sectors (PDF Report)
Creamer Media’s Road and Rail 2015 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail infrastructure and network, the funding and maintenance of these respective networks, and...
Defence 2015: A review of South Africa's defence sector (PDF Report)
Creamer Media’s Coal 2015 report examines South Africa’s coal industry with regards to the business environment, the key participants in the sector, local demand, export sales and coal logistics, projects being undertaken by the large and smaller participants in the...
Real Economy Year Book 2015 (PDF Report)
There are very few beacons of hope on South Africa’s economic horizon. Economic growth is weak, unemployment is rising, electricity supply is insufficient to meet demand and/or spur growth, with poor prospects for many of the commodities mined and exported. However,...
Real Economy Insight: Automotive 2015 (PDF Report)
Creamer Media’s Real Economy Year Book comprises separate reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, gold, iron-ore and platinum sectors.
Real Economy Insight: Water 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
This Week's Magazine
Black-owned investment holding company Sphere Holdings plans to raise a further R1-billion in the coming months in support of its strategy to become a leading black industrial enterprise, which could ultimately seek a listing on the JSE.
Energy analyst and EE Publishers MD Chris Yelland warned recently against excessive optimism regarding timescales for the proposed construction of new nuclear power plants (NPPs) in South Africa. He was speaking at a Nuclear Roundtable in Johannesburg. “I think we...
Malawi’s Lilongwe Water Board (LWB) is inviting eligible bidders to prequalify for the board’s efficiency improvement works, which will be implemented as part of the E24-million Lilongwe Water Resources Efficiency Programme. LWB CEO Alfonso Chikuni explains that...
CROATIA, AN EU MEMBER BUT NOT A TDCA MEMBER On July 1, 2013, Croatia officially became the twenty-eighth member of the European Union (EU). Despite Croatia’s accession into the EU, it is yet to become party to the Trade, Development and Cooperation Agreement (TDCA)...
The Council for Scientific and Industrial Research (CSIR) has announced that its new Inundu airborne electronics testing, evaluation and training pod had made its first test flight on September 10. The successful flight was undertaken from Lanseria International...