XIAONing,TANG Guo-qing,ZHOUJia-zhong,et al.Application of Pure MBBR and A/O Double Sludge System in Pharmaceutical Wastewater Denitrification Project[J].China Water & Wastewater,2022,38(14):93-98.
Application of Pure MBBR and A/O Double Sludge System in Pharmaceutical Wastewater Denitrification Project
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第14期
Page:
93-98
Column:
Date of publication:
2022-07-17
- Keywords:
- pure MBBR; high concentration ammonia nitrogen; pharmaceutical wastewater; pH impact; industrial wastewater; toxic shock
- Abstract:
- In view of the problems faced by a pharmaceutical sewage treatment plant during expansion and upgrading, including high ammonia nitrogen removal rate, high concentration of toxic and harmful substances in the influent, no new land use, large fluctuation of water quality and quantity, and difficulties in project construction, the pure MBBR process is used to innovate the original biochemical tank. The existing A/O activated sludge denitrification process is transformed into a double sludge system of pure MBBR and A/O denitrification. The actual operation results show that the pure MBBR can effectively reduce the influent ammonia nitrogen load, the nitrification capacity reaches 0.45 kgN/(m3·d), and the effluent ammonia nitrogen is less than 5 mg/L during normal operation, which realizes the goal of improving quality and production of the pharmaceutical factory and ensures the stability of the actual effluent quality. Faced with the impact of influent pH, dichloromethane, and surge of influent load after long-term low substrate operation, the pure MBBR system is less affected and exhibits strong anti?toxicity and rapid recovery capabilities. The pure MBBR tank can realize the oxygenation of the system and good fluidization of suspended carrier only through aeration. The power consumption of the blower is 1.0-1.8 kW·h/m3, accounting for 20%-35% of the total power consumption of the whole plant. The pure MBBR process has the advantages of high load and strong impact resistance, which is suitable for the treatment of high concentration ammonia nitrogen industrial wastewater.
Last Update:
2022-07-17