Thickened Waste Activated Sludge Research Showcased in September WER

September 27, 2018

WEF Resources & Efforts

Click to access the September 2018 issue of Water Environment Research.

Researchers investigated the unbiodegradable fraction of particulate chemical oxygen demand (PCOD) in thickened waste activated sludge (TWAS). They used semi-continuous completely-mixed anaerobic digesters for the study.

A laboratory-scale system was operated at detention times ranging from 16.7 to 33.3 days with organic loading rates between 1.21 and 3.47 kg/L m3. The article, “Estimation of the Unbiodegradable Fraction of Thickened Waste Activated Sludge,” presents the finding that unbiodegradable fractions of PCOD and volatile suspended solids range between 0.26 and 0.28.

“In their paper on thickened waste activated sludge, Chowdhury et al. used long term anaerobic studies … to determine the fraction of unbiodegradable particulate COD,” said Tim Ellis, WER editor-in-chief. “This study provides additional information for the design and operation of anaerobic digestion processes to achieve volume reduction, pathogen destruction, and energy recovery from waste active sludge.”

Other papers published in this issue include

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