田海成 1王磊 1沙涛 2梁瑜海 3徐跃 1焦文海1
作者信息
- 1. 济南市市政工程设计研究院<集团>有限责任公司,山东济南 250001
- 2. 济南市先行区首创水务发展有限公司,山东济南 250000
- 3. 华南农业大学资源环境学院,广东 广州 510642
- 折叠
摘要
Abstract
[Objective]To meet high standard effluent quality requirements,[Methods]anaerobic/anoxic/aerobic/post-anoxic method combining membrane bioreactor(AAOA+MBR)process with high sludge concentration,short hydraulic residence time and high total nitrogen removal efficiency is adopted by an all-underground wastewater treatment plant(WWTP)in Shandong Province.In this paper,the sludge reflux mode and reflux ratio of AAOA+MBR process,the actual sludge concentration of each tank,the actual flow of each tank and the concentration of matrix are simulated and analyzed.[Results]The results show that the sludge concentration in aerobic zone and the anoxic zone is 2.08 times and 1.67 times of that in the anaerobic/anoxic/aerobic/post-anoxic/post-aerobic method(AAOAO)+settling tank process,respectively.The concentration of ammonia nitrogen matrix in aerobic tank and nitrate nitrogen matrix in anoxic tank are 0.54 times and 0.73 times respectively in AAOAO+sedimentation tank.[Conclusion]Compared with conventional AAOAO+settling tank,the residence time of each tank in AAOA+MBR process should consider the difference of sludge concentration in each tank and the influence of reduced substrate concentration on microbial degradation rate.After nearly a year of operation,the actual effluent BOD5,COD,ammonia nitrogen and TP are better than the Class Ⅳ standards of Environmental Quality Standards for Surface Water(GB 3838-2002).The AAOA system is equipped with an intelligent inspection robot that integrates the functions of network photography,temperature and humidity detection,toxic and harmful gas detection,etc.,the inspection difficulty of the whole underground WWTP is effectively reduced and the intelligent management level is improved.The MBR membrane tank adopts the relay transportation mode of single rail S-type hoist and electric flat car,which overcomes the problems of long running distance of single rail S-type hoist and frequent faults of electric hoist,the speed of installation and off-line cleaning of the membrane box is greatly improved.In response to the layout challenge of the sludge dewatering room in the fully underground WWTP under the requirement of low sludge moisture content,the high-pressure belt continuous sludge deep dewatering machine process with smaller size and height is adopted which is easy to be arranged in the underground box.Meanwhile,the safe operation of the fully underground WWTP is achieved through the enhanced anti-flooding design,deodorization design,fire protection and ventilation smoke exhaust design.This design could provide guidance for other underground WWTPs.关键词
全地下式污水处理厂(WWTP)/厌氧/缺氧/好氧/后置缺氧法+膜生物反应器(AAOA+MBR)/高压带式污泥深度脱水机/智能巡检机器人Key words
underground wastewater treatment plant(WWTP)/anaerobic/anoxic/aerobic/post-anoxic method combining membrane bioreactor(AAOA+MBR)/high-pressure belt sludge deep dehydrator/intelligent inspection robot分类
建筑与水利
