JIANGFu-hai,ZHANG Xian-zhong.Design and Operation of Upgrading and Reconstruction Project of a WWTP Using Biolak Process[J].China Water & Wastewater,2022,38(6):86-92.
Design and Operation of Upgrading and Reconstruction Project of a WWTP Using Biolak Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第6期
Page:
86-92
Column:
Date of publication:
2022-03-17
- Keywords:
- Biolak; modified Bardenpho process; sand adding clarifier
- Abstract:
- In order to meet the enhanced treatment requirements of level quasi-Ⅳ discharge standard, an urban wastewater treatment plant with Biolak tank as its main process, takes coordinal measures of WWTP and drainage network for quality and efficiency improvement, such as improving the efficiency of inner carbon source from upstream sewage into the influent and implementing the sludge sewage upgrading, through systematically sorting out the shortcomings of the original facilities and indicators to reach the standard. The modified Bardenpho process was adopted as the new treatment unit of the WWTP, namely, the anaerobic zone and anoxic zone of the traditional five-stage Bardenpho was spatially inverted, with multipoint distribution of influent, the addition of deaeration zone and other benefit to improve nitrification, denitrification, carbon reduction and phosphorus removal was designed. It introduces energy-saving frequency variable blower, new efficient aerator without water cut-off for maintenance, as well as operation strategy of low oxygen aeration to save energy, and is also supplemented by sand adding clarifier with intensive footprint. Thus the actual effluent pollutant concentration is stably below 65% of the new discharge limits and the sludge is reduced by 48%. The energy and chemical consumptions are saved by 16% and 28% respectively. The recycle rate of reclaimed water exceeds 30%.
Last Update:
2022-03-17