Bioaugmentation and enhanced formation of microbial granules used in aerobic wastewater treatment

被引：83

作者：

Ivanov V. ^{[1
]}

Wang X.-H. ^{[1
]}

Tay S.T.-L. ^{[1
]}

Tay J.-H. ^{[1
]}

机构：

[1] School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798

来源：

Applied Microbiology and Biotechnology | 2006年 / 70卷 / 3期

关键词：

Chemical Oxygen Demand; Activate Sludge; Enrichment Culture; Aerobic Granule; Chemical Oxygen Demand Removal Efficiency;

D O I：

10.1007/s00253-005-0088-5

中图分类号：

学科分类号：

摘要：

Microbial aggregates of an aerobic granular sludge can be used for the treatment of industrial or municipal wastewater, but their formation from a microbial activated sludge requires several weeks. Therefore, the aim of this research was the selection of microbial cultures to shorten the granule-forming period from several weeks to a few days. An enrichment culture with the ability to accelerate granulation was obtained by repeating the selection and batch cultivation of fast-settling microbial aggregates isolated from the aerobic granular sludge. Bacterial cultures of Klebsiella pneumoniae strain B and Pseudomonas veronii strain F, with self-aggregation indexes of 65 and 51%, respectively, and a coaggregation index of 58%, were isolated from the enrichment culture. A mixture of these strains with the activated sludge was used as an inocolum in an experimental sequencing batch reactor to start up an aerobic granulation process. Aerobic granules with a mean diameter of 446±76 μm were formed in an experiment after 8 days of cultivation, but microbial granules were absent in controls. Considering biosafety issues, K. pneumoniae strain B was excluded from further studies, but P. veronii strain F was selected for larger-scale testing. © Springer-Verlag 2005.

引用

页码：374 / 381

页数：7

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