期刊
JOURNAL OF BIOTECHNOLOGY
卷 157, 期 4, 页码 505-511出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2011.09.024
关键词
Acinetobacter Johnsonii S35; Coaggregation; Floc-formation; Activated sludge; FISH
The coaggregation behavior of Acinetobacter johnsonii S35 isolate with sewage bacteria was assessed by a spectrophotometric assay using different samples from a municipal wastewater treatment plant and a community plant. A. johnsonii S35 coaggregated well with other free bacteria and microflocs at the mixing ratios of 0.2:1-0.6:1 of A. johnsonii S35 and sewage samples. In addition, the size of coaggregates became larger (100 pm or more) under the same conditions. A. johnsonii S35 cells were highly adsorbed (adsorption = 93-99%) onto sludge samples. Microbial adhesion to hydrocarbon (MATH) test and adsorption to octyl-Sepharose CL-4B showed that A. johnsonii S35 cells and sludge samples had a hydrophobic character. The population of Acinetobacter spp. in sewage treatment plants was 2-7% and its role in bioflocculation was discussed. The present study revealed that A. johnsonii S35 isolate can play as a bridging organism and contribute in floc-formation in activated sludge process. (C) 2011 Elsevier B.V. All rights reserved.
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