LI Su,ZHANG Yong-mei,WU Hao,et al.Application of Total Nitrogen Pre-regulation Method in a WWTP[J].China Water & Wastewater,2024,40(20):89-94.
Application of Total Nitrogen Pre-regulation Method in a WWTP
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第20期
Page:
89-94
Column:
Date of publication:
2024-10-17
- Keywords:
- wastewater treatment plant; fine management; anoxic zone; nitrate nitrogen; ammonia nitrogen; total nitrogen; internal reflux; pre-regulation
- Abstract:
- The stable and up-to-standard discharge of total nitrogen is a challenge for effluent quality control in many wastewater treatment plants (WWTPs). Currently, it is mainly achieved through the regulation of system process parameters based on the experience of management personnel, e.g., controlling dissolved oxygen and adding carbon sources. However, these methods are relatively inaccurate and have delayed reactions, which no longer meet the requirements of refined management in WWTPs. By analyzing the data relationship between total nitrogen, nitrate nitrogen, and ammonia nitrogen contents in each treatment section, it is found that controlling the dissolved nitrate nitrogen and ammonia nitrogen contents in the mixed liquor at the end of the anoxic zone within a certain range (the sum of nitrate nitrogen and ammonia nitrogen contents less than 10 mg/L), then the total effluent nitrogen content can be stably discharged up to standard (less than 10 mg/L), i.e. achieving pre?regulation of total effluent nitrogen.
Last Update:
2024-10-17