| Related citation: | PENG Zhao-xu,PENG Yong-zhen,LIU Xu-liang,YU Zhen-bo,CHAI Tong-zhi.Effects of low temperature on sludge settleability and nutrients removal performance treating domestic wastewater[J].Journal of Harbin Institute Of Technology(New Series),2011,18(5):55-60.DOI:10.11916/j.issn.1005-9113.2011.05.010. |
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| Author Name | Affiliation | | PENG Zhao-xu | State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China | | PENG Yong-zhen | State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China
College of Environment and Energy Engineering,Beijing Institute of Technology,Beijing 100022,China | | LIU Xu-liang | State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China | | YU Zhen-bo | State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China | | CHAI Tong-zhi | State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China |
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| Abstract: |
| In order to investigate the effect of temperature on activated sludge systems,sludge settleability,nitrogen and phosphorus removal processes were investigated by changing temperature variation patterns using 4 sequencing batch reactors (SBR).The results showed that no matter temperature changes in the range of 15-22 ℃ (decrease or increase) gradually or sharply,it has little effect on nitrogen and phosphorus removal processes.But when temperature decreases to 12 ℃,biochemical reactions will be inhibitted obviously.At least 1 sludge retention time (SRT) is needed for nitrification adapt to new temperature envirionment,and more time is necessary for phosphorus removal process.When temperature increases from 12 ℃ to 22 ℃ sharply,nitrification process deteriorates seriously,but phosphorus removal process shows no change.In addition,sludge settleability deteriorates when temperature changes sharply (decrease or increase),but the reasons are different.Under temperature decrease condition,it is mainly caused by the increase of accumulated extracellular polymeric substances (EPS).Under temperature increase condition,the loosing sludge flocs’ configuration is the main reason.It should be pointed out that the filamentous bacteria content during the entire experiment keeps almost constant,and the sludge settleability variations are the reflection of the change of sludge physicochemical characteristics. |
| Key words: low temperature activated sludge SBR nitrogen and phosphorus removal sludge settleability |
| DOI：10.11916/j.issn.1005-9113.2011.05.010 |
| Clc Number:X703.1 |
| Fund: |
