Involvement of Acinetobacter sp. in the floc-formation in activated sludge process
| Autor: | Toshiyuki Nikata, Shohei Hanazaki, Kimchhayarasy Phuong, Kazuo Kakii |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Flocculation
Time Factors Population Sewage Bioengineering Applied Microbiology and Biotechnology Water Purification Microbiology Japan Microscopy Phase-Contrast Food science Cities education In Situ Hybridization Fluorescence education.field_of_study Acinetobacter biology business.industry food and beverages General Medicine Biodegradation biology.organism_classification Biodegradation Environmental Activated sludge Wastewater Sewage treatment Adsorption business Hydrophobic and Hydrophilic Interactions Biotechnology |
| Zdroj: | Journal of Biotechnology. 157:505-511 |
| ISSN: | 0168-1656 |
| DOI: | 10.1016/j.jbiotec.2011.09.024 |
| Popis: | 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 μm 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. |
| Databáze: | OpenAIRE |
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