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Microbial enzymatic activities in aerobic activated sludge model reactors

Paper ID Volume ID Publish Year Pages File Format Full-Text
18488 42725 2006 5 PDF Available
Title
Microbial enzymatic activities in aerobic activated sludge model reactors
Abstract

Communal, dairy and petroleum wastewaters were separately purified in three aerobic activated sludge model reactors to investigate selected enzymatic activities of microorganisms. Four extracellular enzymes, i.e. leucine-aminopeptidase (L-AMP), β-glucosidase (β-GLC), alkaline phosphatase (APA) and lipase (LIP), were studied. Experimental results show that enzymatic activities associated with microbial cells in the activated sludge flocs accounted for 54.5–97.4% of the total enzyme activities in model reactors, with LIP being the most active enzyme. Highest activities of L-AMP, β-GLC and APA were found in the dairy wastewater reactor. Kinetic parameters of the studied enzymes varied notably, high Vmax followed high aKm, suggesting that inhibition of enzymes took place in the activated sludge systems. There were no significant relationships between enzymatic activities and dissolved organic carbon (DOC) concentrations in the three aerobic reactors during the experiments.

Keywords
Enzymatic activity; Activated sludge; Enzyme kinetics
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Microbial enzymatic activities in aerobic activated sludge model reactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 39, Issue 4, 2 August 2006, Pages 568–572
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
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