Lipid extraction and biodiesel production from municipal sewage sludges: A review

Muhammad N. Siddiquee and Sohrab Rohani

Renewable and Sustainable Energy Reviews, 2011, vol. 15, issue 2, 1067-1072

Abstract: Extensive research is being conducted all over the world to produce fuels from renewable biomass. Biodiesel, a renewable liquid fuel produced from lipid sources, is one of the most attractive among the options explored for alternative energy sources. However, 70-80% of the overall biodiesel production cost is associated with raw materials cost. Municipal sewage sludge is readily available at no cost. It contains various lipids and hence it is a promising raw material for biodiesel production. Lipids can be initially extracted from the sludge. Subsequently, the extracted lipid is converted to biodiesel by esterification and/or transesterification reaction. Biodiesel is also produced by in situ transesterification of dried sludge. This paper reviews the various lipid extraction techniques and biodiesel production processes from municipal wastewater sludge.

Keywords: Biodiesel; Wastewater; solid; sludge; Free; fatty; acid; (FFA); Esterification; Transesterification (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (17)

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