http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.70Change: -0.05
R/$ = 12.40Change: -0.09
Au 1168.40 $/ozChange: -0.40
Pt 1061.50 $/ozChange: -20.50
 
 
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  
 
 
Aug 31, 2012

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

Back
Africa|Cleaning|Engines|Gas|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|Gas|Generators|Projects|Waste|Water||Africa||Cleaning|Energy|Maintenance||Power|Waste|Water|Operations|
africa-company|cleaning-company|engines|gas|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
Creamer Media Senior Deputy Editor
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Energy News
Updated 5 hours ago South Africa-focused mineral explorer and developer White Rivers Exploration (WRE) has signed a memorandum of understanding (MoU) with Windfall Energy to facilitate the joint exploration and development of WRE’s Heilbron and Kroonstad gas assets in the Witwatersrand...
Tanzania's parliament on Sunday approved a legal and regulatory framework for developing its nascent hydrocarbons industry, after days of contentious debate. East Africa has become a new oil and gas frontier after a string of discoveries that producers hope to...
Most commodity prices suffered falls on Monday, compounding worries about oversupply, after Greece rejected terms for a bailout and top consumer China unleashed emergency measures over the weekend to prevent a full-blown stock market crash. Brent crude fell below $60...
More
 
 
Latest News
Updated 4 hours ago State-owned entity Transnet National Ports Authority (TNPA) has started the registration process for its integrated port management system (IPMS), which is scheduled to go live in the Port of Durban at the end of July. TNPA started issuing registration instructions...
Updated 5 hours ago The development of rural road infrastructure and public transport services remains critical to the delivery of South Africa’s – and other African States’ – developmenta agenda, requiring meticulous planning that ties in with the socioeconomic needs of the host...
Updated 5 hours ago South Africa-focused mineral explorer and developer White Rivers Exploration (WRE) has signed a memorandum of understanding (MoU) with Windfall Energy to facilitate the joint exploration and development of WRE’s Heilbron and Kroonstad gas assets in the Witwatersrand...
More
 
 
Recent Research Reports
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.
Real Economy Insight: Road and Rail 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
NHLANHLA NENE The main constraints to economic growth are domestic
Finance Minister Nhlanhla Nene earlier this month stated that, while South Africa’s 2015 economic growth target of 2% was achievable, it was not enough to deliver the tax revenue needed to combat the country’s challenges.
The World Steel Association has published the 2015 edition of the World Steel in Figures report, which shows an increase in steel production as well as provides an overview of steel industry activities from crude steel production to apparent steel use.
The 25-year master plan for Gauteng’s Aerotropolis project will go through a process of approval and adoption during June and July, says Aerotroplis project manager Jack van der Merwe. “We are also in the process of putting together a special purpose vehicle (SPV) to...
SOLAR PANELS The existing buildings in the Coega Industrial Development Zone lent themselves well to rooftop solar panel installations
The Coega Development Corporation (CDC) plans to fit 15 of its buildings, totalling 127 000 m2 of roof space, in the Coega Industrial Development Zone (IDZ), in the Eastern Cape, with solar panels.
The Supreme Court of Appeal’s (SCA’s) November 2014 judgment, ordering steel producer ArcelorMittal South Africa (AMSA) to hand over the 2003 Environmental Master Plan for its Vanderbijlpark steel plant to environmental pressure groups, confirmed the right of civil...
 
 
 
 
 
 
 
 
 
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