Phosphorus Removal Performance During the Recovery Process of Residual Sludge
[1]PENG Zhaoxu,HAN Wei,LOU Tianyu,et al.Phosphorus Removal Performance During the Recovery Process of Residual Sludge[J].Journal of Zhengzhou University (Engineering Science),2020,41(05):72-75.[doi:10.13705/j.issn.1671-6833.2020.05.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 05
Page number:
72-75
Column:
Public date:
2020-10-01
- Title:
- Phosphorus Removal Performance During the Recovery Process of Residual Sludge
- Keywords:
- idle sludge; activity recovery; phosphorus release amount; phosphorus uptake amount; phosphorus removal performance
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.05.010
- Abstract:
- In order to investigate phosphorus removal performance during the recovery process of residual sludge, an anaerobic-aerobic alternating sequencing batch reactor (SBR) was used for domestication, and the changes of specific phosphorus release (uptake) amount, specific phosphorus release (uptake) rate, MLSS and the ratio of phosphorus uptake to phosphorus release (uptake-release) were investigated. It was found that when the sludge retention time was controlled at 12.5 d, specific phosphorus release amount and specific phosphorus uptake amount were increased synchronously, the correlation coefficient was 0.927. Phosphorus removal performance began to recover when the activated sludge was regenerated by 16.7%, and improved obviously after 45.8%. At this time, the ratio of uptake-release was stable at 1.5～2. When activated sludge was regenerated by 58.3%, phosphorus removal performance almost recovered completely. The decrease of pH during anaerobic stage could indirectly indicate the performance of phosphorus release. The correlation coefficient between the variation of pH after the nitrate knee and the phosphorus release amount was 0.675, while the oxidation and reduction potential (ORP) could not indicate phosphorus removal performance either in the anaerobic stage or aerobic stage. A stable structure of activated sludge was the prerequisite for biological phosphorus removal. When the sludge concentration was stable during domestication process, the phosphorus removal performance began to improve significantly.
- References:
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Last Update:
2020-10-23