Microbial community related to lysozyme digestion process for boosting waste activated sludge biodegradability

Waste activated sludge from a lab-scale sequencing batch reactor was used to investigate the potential relation of microbial community with lysozyme digestion process for sludge solubilization. The results showed the microbial community shifted conspicuously as sludge suffered lysozyme digestion. So...

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Bibliographic Details
Published in:Bioresource technology 2015-01, Vol.175, p.112-119
Main Authors: Xin, Xiao-Dong, He, Jun-Guo, Qiu, Wei, Tang, Jian, Liu, Tian-Tian
Format: Article
Language:English
Subjects:
Activated sludge
Biodegradability
Biodegradation, Environmental
Communities
Community relations
Digestion
Lysozyme
Microbial Consortia
Microorganisms
Muramidase - metabolism
Sewage - microbiology
Sludge
Waste Disposal, Fluid - methods
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Summary:Waste activated sludge from a lab-scale sequencing batch reactor was used to investigate the potential relation of microbial community with lysozyme digestion process for sludge solubilization. The results showed the microbial community shifted conspicuously as sludge suffered lysozyme digestion. Soluble protein and polysaccharide kept an increasing trend in solution followed with succession of microbial community. The rise of lysozyme dosage augmented the dissimilarity among communities in various digested sludge. A negative relationship presented between community diversity and lysozyme digestion process under various lysozyme/TS from 0 to 240min (correlation coefficient R(2) exceeded 0.9). Pareto-Lorenz curves demonstrated that microbial community tended to be even with sludge disintegration process by lysozyme. Finally, with diversity (H) decrease and community distribution getting even, the SCOD/TCOD increased steadily in solution which suggested the sludge with high community diversity and uneven population distribution might have tremendous potential for improving their biodegradability by lysozyme digestion.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.10.042