Sorption and release of organics by primary, anaerobic, and aerobic activated sludge mixed with raw municipal wastewater

PloS One
Oskar ModinBritt-Marie Wilén

Abstract

New activated sludge processes that utilize sorption as a major mechanism for organics removal are being developed to maximize energy recovery from wastewater organics, or as enhanced primary treatment technologies. To model and optimize sorption-based activated sludge processes, further knowledge about sorption of organics onto sludge is needed. This study compared primary-, anaerobic-, and aerobic activated sludge as sorbents, determined sorption capacity and kinetics, and investigated some characteristics of the organics being sorbed. Batch sorption assays were carried out without aeration at a mixing velocity of 200 rpm. Only aerobic activated sludge showed net sorption of organics. Sorption of dissolved organics occurred by a near-instantaneous sorption event followed by a slower process that obeyed 1st order kinetics. Sorption of particulates also followed 1st order kinetics but there was no instantaneous sorption event; instead there was a release of particles upon mixing. The 5-min sorption capacity of activated sludge was 6.5±10.8 mg total organic carbon (TOC) per g volatile suspend solids (VSS) for particulate organics and 5.0±4.7 mgTOC/gVSS for dissolved organics. The observed instantaneous sorption appeared to be ma...Continue Reading

References

May 20, 2000·Thorax·M K Henze
Mar 22, 2001·Water Research·A GuellilP Ginestet
Jun 29, 2002·Environmental Technology·U Yetis, E Tarlan
Nov 9, 2005·Water Environment Research : a Research Publication of the Water Environment Federation·Jose A JimenezDenny S Parker
Dec 27, 2005·Water Research·Ebru DulekgurgenDerin Orhon
Jan 19, 2010·Journal of Environmental Monitoring : JEM·Ana Santos, Simon Judd
Aug 30, 2013·Water Science and Technology : a Journal of the International Association on Water Pollution Research·D J I Gustavsson, S Tumlin

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Citations

Jul 28, 2016·Critical Reviews in Environmental Science and Technology·Oskar ModinMalte Hermansson
Apr 18, 2020·AMB Express·Nurul Asyifah MustaphaToshinari Maeda

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Methods Mentioned

BETA
membrane filtration
size exclusion chromatography

Software Mentioned

Excel Solver

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