ZHOU Peng,LI Peng-fei,YANG Li-ya,et al.Influences and Control Strategies of Sludge Bulking with Foam in Improved A2O Process[J].China Water & Wastewater,2021,37(10 10):105-110.
Influences and Control Strategies of Sludge Bulking with Foam in Improved A2O Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
10 10
Page:
105-110
Column:
Date of publication:
2021-05-17
- Keywords:
- improved A2O process; sludge bulking; foam; composite chemicals; sludge replacement; sodium hypochlorite
- Abstract:
- The sludge bulking and its foam problem in the biological tank have always been the control difficulties of improved A2O process. In the second phase of a wastewater treatment plant (WWTP) in Zhengzhou, filamentous bacteria increased and a large number of foam appeared and gathered on the surface of the tank in August and September 2019. The WWTP was controlled in turn by adding composite chemicals to rapidly eliminate the foam, rapidly replacing the sludge in the biological tank, and adding sodium hypochlorite to kill filamentous bacteria. The sludge index of the bioreactor began to decrease and stabilized at about 115 mL/g by early November, which effectively achieves the purpose of controlling sludge bulking and its foam.
Last Update:
2021-05-17