http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 14.94Change: -0.06
R/$ = 13.31Change: -0.01
Au 1134.19 $/ozChange: -0.66
Pt 1008.00 $/ozChange: -12.00
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Letters Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Nov 27, 2009

Gansbaai wastewater project incorporates techno innovation

Back
Engineering|Consulting|Industrial|PROJECT|Project Management|SSI|Water|Energy|Environmental
Engineering|Consulting|Industrial|PROJECT|Project Management|SSI|Water|Energy|Environmental
engineering|consulting-company|industrial|project|project-management|ssi|water|energy|environmental
© Reuse this



Consulting engineering and project management company SSI, a subsidiary of the Nertherlands DHV Engineering group, has commissioned a demonstration-scale wastewater treatment plant featuring the Nereda technology, which it believes to be a breakthrough in wastewater treatment.

“Nereda is a revolutionary technology for the treatment of domestic and industrial wastewater,” SSI water sector GM Francis Gibbons tells Engineering News.

The technology was developed by DHV in partnership with the Delft University of Tech- nology, the Dutch Foundation for Applied Water Research and the Technology Foundation.

Gibbons notes that Nereda uses aerobic sludge granules as opposed to conventional activated sledge flocs. The granules settle much faster than conventional flocs and can operate at mixed liquor concentrations comparable with those of a membrane bio- reactor, while maintaining high settling velocities. The higher biomass concentration allows for a much smaller footprint compared with traditional activated sludge plants.

“The Gansbaai wastewater treatment works is a first-in-the-world project that is using the Nereda technology. We refer to the project as a demonstration-scale project. It was completed last year.”

Owing to the reduced footprint, the proposed plant was able to fit onto the existing site and allowance was made to increase the plant capacity by another 3 M∙/d on the same site of the town.

Gansbaai made use of the existing sewer- age works close to the municipal offices. One area is connected through a piped sys- tem; the other areas are serviced by tankers that deliver septic tank effluent to the works. The capacity of the old sewerage works was limited and the quality of the effluent did not conform to the standards set by the Depart- ment of Water and Environmental Affairs. Faced with increased development in the greater Gansbaai, the Overstrand municipality decided to upgrade the capacity of the old sewerage works to 2 M∙/d in the interim.

The existing site had very limited potential for conventional plant expansion, but was centrally located, whereas the intended new site would have been positioned outside the town where additional land would have had to be bought and an environmental-impact assessment conducted.

Nereda guarantees a 30% energy consumption saving.

“At Gansbaai, a 43% saving was achieved by using the technology, leaving the final project costs at R25-million. A capital cost saving of at least 20% can be expected, but varies from project to project,” says Gibbons.

The test results at Gansbaai revealed that a good-quality effluent had been produced, especially considering the variable nature of the sewage delivered to the works, as most of the effluent is carted by tanker from septic tanks.

Edited by: Martin Zhuwakinyu
Creamer Media Senior Deputy Editor
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Water News
It is predicted that, in the next five years, water demand could outstrip supply in South Africa, says Nedbank Sustainability Carbon Specialist Dr Marco Lotz. With increasing population numbers and urbanisation, the debate regarding the amount of investment in water...
South African water utility Rand Water’s Sedibeng Regional Sanitation Scheme will be undergoing major upgrades to unlock residential and business developments in the Vaal area, as well as parts of the south of Johannesburg, the Gauteng provincial Department of Human...
The Zimbabwe Power Company (ZPC) will cut electricity generation by a third to 475 MW at the Kariba hydropower plant due to low water levels, the company said on Thursday, likely worsening daily power cuts. Kariba produces half of Zimbabwe's electricity. The cut back...
Article contains comments
Article contains comments
More
 
 
Latest News
A preliminary investigation by the Railway Safety Regulator (RSR) into the derailment of a Shosholoza Meyl train in Kimberley earlier this month, found that Transnet Freight Rail (TFR) had failed to communicate with the Passenger Rail Agency of South Africa (PRASA)...
Three of home improvement company Illiad’s major shareholders – Sanlam, Visio and Coronation, which held 69.25% – have agreed to vote in favour of a takeover by Steinhoff, with the company’s remaining shareholders to vote on the deal on September 29. Seventy-five per...
Government should face the fact that South Africa’s full-blown jobs crisis is a matter of urgent public importance, the Democratic Alliance (DA) said on Friday. MP James Vos, the DA shadow minister of tourism, was responding to a letter by Baleka Mbete, the Speaker...
More
 
 
Recent Research Reports
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.
Real Economy Insight: Construction 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.
Real Economy Insight: Electricity 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
Training company The Intelligence Transfer Centre will host the fourth yearly Environmental Crimes Conference at the Indaba Hotel, in Fourways, Johannesburg between September 9 and 10. Confirmed key regulatory bodies that will attend the event include the Department...
The government of Egypt has said it is ready to provide technical assistance to Malawi in the development of the Shire–Zambezi waterway, which is designed to link landlocked Malawi to the Indian Ocean by opening the two rivers for navigation. Egyptian ambassador to...
Kenya is finally set to start building a new multipurpose petroleum pipeline, after securing a $350-loan from a consortium of banks, including South Africa's Rand Merchant Bank. The other banks in the consortium are the Cooperative Bank of Kenya, Citibank's Kenya...
MARAIS VAN HEERDEN The owner/operator should be able to view the overall project design and progress made at any time
Three-dimensional (3D) engineering design models can now be viewed on tablets, which enable stakeholders to view the design without having to buy the design software used to create it, says engineering design firm 3DDraughting executive Marais van Heerden. The...
Ford’s newest offering in a long list of newcomers to the local market in the last two years is the B-Max multi-activity vehicle (MAV). The B-Max will play in the so called B-MAV segment, or the small MAV segment, currently dominated by Toyota’s Avanza, which sells...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks
Subscribe Now for $96 Close
Subscribe Now for $96