Phosphorus accumulation by bacteria isolated from a ontinuous-flow two-sludge system |
| |
Authors: | BAO Lin-lin LI Dong LI Xiang-kun HUANG Rong-xin ZHANG Jie LV Yang XIA Guang-qing |
| |
Affiliation: | 1. School of Municipal and Engineering,Harbin Institute of Technology,Harbin 150090,China 2. School of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100022,China 3. School of Municipal and Engineering,Harbin Institute of Technology,Harbin 150090,China;School of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100022,China 4. Institute of Geology and Geophysics of Jilin Province,Changchun 130021,China |
| |
Abstract: | In this article, polyphosphate-accumulating organisms (PAOs) from a lab-scale continuous-flow two-sludge system was isolated and identified, the different phosphorus accumulation characteristics of the isolates under anoxic and aerobic conditions were investigated. Results showed that two kinds of PAOs were both found in the anoxic zones of the two-sludge system, one of them utilized only oxygen as electron acceptor, and the other kind utilized either nitrate or oxygen as electron acceptor. Of the total eight isolates, five isolates were capable of both utilizing nitrate and oxygen as electron acceptors to uptake phosphorus to some extent. And three of the five isolates showed good phosphorus accumulation capacities both under anoxic or aerobic conditions, two identified as Alcaligenes and one identified as Pseudomonas. Strcptococcus was observed weak anoxic phosphorus accumulation because of its weak denitrification capacity, but it showed good phosphorus accumulation capacity under aerobic conditions. One isolates identified as Enterobacteriaceae was proved to be a special species of PAOs, which could only uptake small amounts of phosphorus under anoxic conditions, although its denitrification capacity and aerobic phosphorus accumulation capacity were excellent. |
| |
Keywords: | aerobic phosphorus accumulation anoxic phosphorus accumulation continuous-flow two-sludge system polyphosphate-accumulating organisms (PAOs) system isolated bacteria accumulation small anoxic conditions special species weak denitrification capacity Pseudomonas good electron acceptor uptake extent total kind nitrate oxygen |
本文献已被 CNKI 维普 万方数据 ScienceDirect PubMed 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《环境科学学报(英文版)》下载全文 |
|