The University of Massachusetts Amherst
University of Massachusetts Amherst

Search Google Appliance

Links

Impacts of the MicroSludge™ process on odor causing compounds in anaerobically digested biosolids

TitleImpacts of the MicroSludge™ process on odor causing compounds in anaerobically digested biosolids
Publication TypeJournal Article
Year of Publication2007
AuthorsNovak JT, Park C, Higgins MJ, Erdal ZK
JournalWater Practice
Volume1
Issue4
Start Page1
Pagination1-12
Date Published09/2007
KeywordsAnaerobic digestion, MicroSludge™, odor reduction, Sludge
Abstract

The MicroSludge™ process is a patented process that liquefies waste activated sludge (WAS) to improve the rate and extent of its degradation by anaerobic digestion. The MicroSludge process was operated full-scale at the Los Angeles County Sanitation District's Joint Water pollution Control Plant from October 2005 until August 2006 to evaluate the performance of this technology for enhancing anaerobic digestion. Biosoilds samples from the anaerobic digester receiving MicroSludge treated WAS were compared to samples from a control digester to determine the effect of the MicroSludge process on odor generation from dewatered sludge cakes. It was found that the MicroSludge process reduced total volatile organic sulfur compounds (TVOSC) by about 50% for most sludges tested, even though the fraction of WAS was only 25% of the digester feed. The mechanism for the reduction is not clear since the additional volatile solids reduction was in the range of 3 to 6%.

DOI10.2175/193317707X243409