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First year biomethane plant of BSR in Berlin: From biowaste to biofuel

Generation of biomethane from biowaste is thought to be a very interesting and climate friendly option for substitution of fossil fuels. However comprehensive data considering all relevant aspects of plant operation and subsequent processes with reference to emissions, energy efficiency and climate protection are rare. To close this gap an extensive program with data collection and measuring for 1 year was conducted by BSR in Berlin to get a detailed description of the recently installed Biogas West process and to evaluate the greenhouse gas balance of this process. The resulting key figures and balances give a reliable insight in what is fact today about generation of biofuel from biowaste by anaerobic digestion according to best practice and high emission reduction standards.

Since 2013 the public cleansing service of the City of Berlin 'Berliner StadtreinigungsbetriebeAöR' (BSR) operates a plant for anaerobic digestion (AD) of 60,000 t/y separatelycollected biowaste (plant 'Biogas Westâ€�). Biogas is upgraded to biomethane, which isutilized as motor fuel for the waste collection vehicles of BSR. For that purpose it is injectedinto the public gas grid and discharged at BSR depots. Today biofuel from biowastedrives about 150 gas powered waste collection vehicles in Berlin.Ever since first conceptual considerations the plant concept of Biogas West was orientedto operate with very low emissions. Therefore, during design of Biogas West,emission data from existing AD-plants available at that time and the identified sourcesof emissions as well as potentials for optimization were consequently considered. Theseinclude for example
- Exhaustive digestion of biowaste using a continuous dry fermentation system
- Minimization of methane emissions from solid digestate by immediate aerobisation

Copyright:	© Wasteconsult International
Quelle:	Waste-to-Resources 2015 (Mai 2015)
Seiten:	23
Preis:	€ 11,50
Autor:	Dr. rer. nat. Karsten Kanning Dr.-Ing. Ketel Ketelsen
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