Biogas CHP for huge Hungarian wastewater scheme

20 May 2010 - One of Europe’s most ambitious biogas from wastewater projects has been switched on in Budapest by the UK-based CHP technology provider ENER-G.
 
The company’s Hungarian subsidiary ENER-G Energia Technologia has designed and built a €2.6 million (US$3.2 million) renewable energy centre at the Budapest wastewater treatment plant in Csepel – part of the Living Danube programme, said to be Europe’s largest environmental investment currently under implementation.
 
ENER-G has installed a 4.5 MWe biogas cogeneration system, together with three 2.5 MW Loos boilers for additional hot water generation using natural gas, or biogas. The company also manages the operations and maintenance services.
 
The renewable energy centre forms part of a biological treatment complex covering 70,000 m2 on a site at Csepel Island.
 
The plant will increase the amount of biologically treated wastewater in Budapest to 95% by 2010 – treating an average of 350,000 m3/day wastewater from most of Buda and part of Pest, serving approximately one million people.
 
Construction of the plant, which was financed by the European Union, the Hungarian state and Budapest municipality, took more than two years and cost nearly half a billion Euros.
 
The energy centre will run at up to 80% per cent capacity until September, when it will be fully commissioned, says ENER-G.
 
It will supply up to 4.5 MWe of renewable electricity to the site, more than 50% of the plant’s total electricity consumption. The maximum 8.5 MW heat generated by the CHP unit is utilized in the digester process.
 
Digestion plants produce a biogas which has high methane content of, typically, 50–70%. This otherwise environmentally damaging gas is a rich fuel that can drive a CHP unit to generate both heat and electricity.
 
ENER-G says it has considerable experience of building, operating and financing major biogas projects across Europe.
 
Its flexible financing menu includes a capital purchase option; medium and long-term rental of generating plant; discount energy purchase plan for electricity; and a fully-financed option.

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