The Effect of Composting on the Organic Colloidal Fraction from Domestic Sewage Sludge

Abstract

The alkali-soluble, acid-insoluble sludge fraetíon (humic-like) was isolated after exhaustive lipid extraetion, and analyzed by chemical degradation followed by eombined gas ehromatography mass spectrometry. It was observed that this sludge fraction contained an important amount of lipid compounds (more than 40% by weight). Most of this lipid material can… (More)

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