Characterization of the fate of lipids in activated sludge
Kangala B. Chipasa , Krystyna Me?drzycka
DOI:
Received July 23, 2007,Revised November 16, 2007, Accepted , Available online
Volume 20,2008,Pages 536-542
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Experiments were carried out to characterize the transformation of lipids in activated sludge under aerobic conditions. Results
showed that the overall lipid content in the e uent could not be reduced to values below 300 mg/L from an initial content of 2,000
mg/L. However, the contents of individual fatty acids underwent drastic decreases and increases during all microbial growth phases.
These changes in contents of individual fatty acids showed that fatty acids were used as substrates by microorganisms as well as released
into the wastewater as by-products.We have therefore suggested a novel model of transformation of lipids in activated sludge, showing
that utilization of microbial activity for complete removal of lipids from wastewater is limited.
