Publication Date: 2007  |  File Size: 7p, 240kb

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Abstract Municipal wastewater treatment plants in the USA produce over 6.2x106 t of dried sewage sludge every year. This microorganism-rich sludge is often land filled or used as fertilizer. Recent restrictions on the use of sewage sludge, however, have resulted in increased disposal problems. Extraction of lipids from sludge yields an untapped source of cheap feedstock for biodiesel production.

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Publication Date: 2004  |  File Size: 13p, 76kb

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A paper from the 19th World Energy Congress which provides an overview of the social and environmental issues often associated with hydropower and presents specific mitigation measures that have proven their effectiveness in tackling both environmentally and socially sensitive issues raised by hydropower projects.

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Publication Date: 2005  |  File Size: 7p, 539kb

Document Description:

Government targets for renewable energy and the Renewable Obligations suggest a renewed interest in mini-hydropower. However, changes in climate and, in particular precipitation, have been shown to significantly alter the quantity and distribution of river flows. These changes have been shown to impact on the production and the economics of large hydropower schemes.  More   Less 

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