http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.77Change: 0.05
R/$ = 10.93Change: -0.08
Au 1205.26 $/ozChange: -18.92
Pt 1249.00 $/ozChange: -21.20
 
 
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 Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Aug 31, 2012

Biogas-from-sludge solution could yield power savings for water plants

Back
Africa|Cleaning|Engines|Generators|Projects|Waste|Water|WEC Projects|Africa|South Africa|By-product|Chemical Compounds|Cleaning|Electricity|Electricity Grid|Energy|Energy-generation Potential|Fuel Gas Engine Generators|Maintenance|Possible Electricity Saving|Product|Jason Gifford|Power|Waste|Water|Operations|Wastewater Treatment
Africa|Cleaning|Engines|Generators|Projects|Waste|Water||Africa||Cleaning|Energy|Maintenance||Power|Waste|Water|Operations|
africa-company|cleaning-company|engines|generators|projects|waste-company|water-company|wec-projects|africa|south-africa|byproduct|chemical-compounds|cleaning|electricity|electricity-grid|energy|energy-generation-potential-industry-term|fuel-gas-engine-generators|maintenance|possible-electricity-saving|product|jason-gifford|power|waste|water|operations|wastewater-treatment
© Reuse this



Aconsiderable 30 MW a year could poten- tially be saved at South African waste- water treatment plants should the methane-rich biogas emitted as a by-product be exploited for its energy-generation potential.

Jason Gifford, spokesperson for the Energy Division of WEC Projects, a firm which is implementing South Africa’s first biogas-to-power plant at a municipal wastewater treatment works, explains that biogas produced during the sewage treatment process has the potential to reduce the plant’s dependence on the national electricity grid.

“Biogas can be used to fuel gas engine generators at treatment works and provide a percentage of the electricity these plants use for operation,” he explains.

Considering that there are around 50 major municipalities in South Africa with a wastewater treatment plant large enough to operate an effective biogas plant, 30 MW is a conserva- tive estimate of the possible electricity saving.

Treatment plants traditionally use a natural process, known as anaerobic digestion, which involves the decomposition of organic matter in the absence of oxygen, to convert a large proportion of the solid sewage sludge, produced in the mainstream treatment processes, into biogas.

Following anaerobic digestion, the biogas produced is termed raw fuel, as it contains water, hydrogen sulphide as well as a variety of volatile organic and chemical compounds that can damage the moving parts in engines.

“For biogas to be an effective fuel, it therefore needs to be conditioned and have these contami- nants removed to ensure long-term sustainability of the plant engine and a lower overall running cost,” says Gifford.

A biogas-to-power plant may provide wastewater treatment works with an on-site energy source that could enable it to offset a portion of its running costs.

Critically, Gifford emphasises that, as the mandate of municipal water works is not to generate electricity, but to clean wastewater, it is important to outsource the running of biogas- to-power plants to specialised contractors.

“In certain international cases, the function of biogas-to-energy operations at water works has exceeded the initial mandate of cleaning effluent and has become the primary focus of the entire plant, resulting in a deterioration of the quality of the treated effluent,” he notes.

Gifford adds that the true financial benefit of municipal biogas plants is evident when savings are not lost to other divisions within the municipality, but reinvested into the effluent treatment works for maintenance and upgrade.

In addition, he says, the cost of a fully commissioned biogas-to-power operation, including full automation and remote monitoring, can be recouped after four to seven years, making it a financially viable long-term energy option.

Edited by: Martin Zhuwakinyu
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Oil and Gas News
Article contains comments
The first exploratory drill head could be biting its way down through Karoo rock in search of shale gas by as early as mid-2016, according to the Mineral Resources department. Speaking to Sapa after briefing MPs on shale gas exploration licences, deputy director...
China National Petroleum Corporation (CNPC) has agreed to pay $400-million in compensation to settle an environmental dispute with Chad, the central Africa country's oil minister said on Monday, a fraction of the $1.2-billion sought by the government. "A definitive...
Article contains comments
Challenger Energy MD Robert Willes
The Petroleum Agency South Africa (Pasa) has confirmed on Monday that it would proceed with the processing of pending shale-gas applications received prior to February 1, 2011. The applicants affected include Shell South Africa Upstream, Falcon Oil and Gas and...
More
 
 
Latest News
Mossel Bay harbour
Updated 2 hours 20 minutes ago The National Ports Authority (NPA) has taken steps to ensure the Ebola virus disease does not enter South Africa through one of its main harbours, Public Enterprises Minister Lynne Brown revealed on Thursday. "As of September 23, all vessels [from certain countries]...
Updated 3 hours ago AltX-Listed Huge Group on Thursday said it had secured a loan agreement that would enable the funding of the company’s significant growth. In a statement to shareholders, Huge Group said that, following a “high level of interest” from debt finance providers, wholly...
Herman Burger, Madeleine du Toit and Corney van Rooyen
Updated 4 hours ago A high-standard technical paper, titled ‘Laser metal deposition microstructure of modified low-C martensitic stainless steel’, has secured two Council for Scientific and Industrial Research (CSIR) metallurgists and a University of Pretoria (UP) professor the...
More
 
 
Recent Research Reports
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 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 network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
Real Economy Insight: Automotive 2014 (PDF Report)
This four-page brief covers key developments in the automotive industry over the past 12 months, including an overview of South Africa’s automotive market, trade figures, production and the policies influencing the sector.
Real Economy Insight: Construction 2014 (PDF Report)
This five-page brief covers key developments in the construction industry over the past 12 months. It provides an overview of the sector and includes details of employment in the sector, infrastructure and municipal spending, as well as insight into companies’...
Real Economy Insight: Electricity 2014 (PDF Report)
This five-page brief covers key developments in the electricity industry over the past 12 months, including details of State-owned power utility Eskom’s generation activities, funding and tariffs, independent power producers and prospects for the sector.
 
 
 
 
 
This Week's Magazine
Integrated energy and chemical company Sasol has partnered with Unisa Graduate School of Business Leadership (SBL) professor and founder and CEO of PanAvest Partnership Dr Douglas Boateng to publish a series of books on executive supply chain management aimed at...
MORNÉ DU PLESSIS Increased urgency and burgeoning awareness of the importance of these issues are beginning to change political risks and, thus, State responses to environmental concerns
The World Wide Fund for Nature’s (WWF’s) 2014 Living Planet Index (LPI) indicates that there has been a 52% decline in vertebrate species since 1970. The Index tracked the trends of 10 000 discrete populations of over 3000 vertebrate species between 1970 and 2010.
Rwanda has joined a number of East African countries seeking to import electricity from Ethiopia as its demand grows. After it became apparent several generation project it is implementing will not come on stream early enough, now plans to import 400 MW from Ethiopia...
Metrorail’s first new passenger train will arrive in November next year, says Passenger Rail Agency of South Africa (PRASA) CEO Lucky Montana. “Next year we will be able to put our hands around the infrastructure and equipment we have been talking about for so long.”
The Competition Commission has launched an investigation into what it says are “price fixing, market division and collusive tendering in the market for the manufacture and supply of automotive components to original equipment manufacturers” (OEMs, or vehicle...
 
 
 
 
 
 
 
 
 
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