Mar 30, 2012
Need for modular sewage plant solution growsBack
Construction|DRC|Engineering|Gold|Africa|Aqua Services & Engineering|Civils|Design|Environment|Flow|Mining|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|Water|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)
Other Sewage and Effluent News
The Competition Commission has appointed Bukhosibakhe Majenge legal services divisional manager, effective April 1. The commission advised on Tuesday that Majenge would take over from Wendy Ndlovu, appointed manager in the office of the Commissioner. Majenge had...
Aim-listed energy provider Ncondezi Energy has been granted an extension for meeting certain conditions relating to the conditional commercial deal signed between it and Electricidade de Moçambique (EdM) for its 300 MW power plant. Ncondezi was establishing an...
Recent Research Reports
Steel 2015: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2015 report provides an overview of the key developments in the global steel industry and particularly of South Africa’s steel sector over the past year, including details of production and consumption, as well as the country's primary carbon...
Projects in Progress 2015 - First Edition (PDF Report)
In fact, this edition of Creamer Media’s Projects in Progress 2015 supplement tracks developments taking place under the Renewable Energy Independent Power Producer Procurement Programme, which has had four bidding rounds. It appears to remain a shining light on the...
Electricity 2015: A review of South Africa's electricity sector (PDF Report)
Creamer Media’s Electricity 2015 report provides an overview of State-owned power utility Eskom and independent power producers, as well as electricity planning, transmission, distribution and the theft thereof, besides other issues.
Construction 2015: A review of South Africa’s construction sector (PDF Report)
Creamer Media’s Construction 2015 Report examines South Africa’s construction industry over the past 12 months. The report provides insight into the business environment; the key participants in the sector; local construction demand; geographic diversification;...
Liquid Fuels 2014 - A review of South Africa's Liquid Fuels sector (PDF Report)
Creamer Media’s Liquid Fuels 2014 Report examines these issues, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing, competition in the sector, the...
Water 2014: A review of South Africa's water sector (PDF Report)
Creamer Media’s Water 2014 report considers the aforementioned issues, not only in the South African context, but also in the African and global context, and examines the issues of water and sanitation, water quality and the demand for water, among others.
This Week's Magazine
Projected capital expenditure (capex) in the South African automotive assembly industry should reach a record R7.48-billion this year, says the National Association of Automobile Manufacturers of South Africa (Naamsa) in its 2014 fourth quarter business review. Capex...
After several years of navigating project-threatening red tape and currency fluctuations, the 4.4 MW Bronkhorstspruit biogas power plant, which will supply clean energy to a leading automotive manufacturer in Gauteng, is expected to enter production before June....
South African paper and pulp producer Sappi reported earlier this month that it would build a pilot plant for the production of low-cost Cellulose NanoFibrils, or CNF (nanocellulose) at the Brightlands Chemelot Campus in Sittard-Geleen in the Netherlands.
The long-term outlook for Nigeria is a country that has the potential to be very strong. So affirmed International Monetary Fund (IMF) Nigeria Mission Chief and Senior Resident Representative Dr Gene Leon on recently. "But we are starting from a point of huge...
Poor infrastructure planning and inadequate maintenance are becoming increasingly problematic for new developments and the associated infrastructure required to support such developments. In many urban and rural municipalities, the state of infrastructure has been...