摘要
研究了移动床生物膜反应器(MBBR)同步硝化反硝化生物脱氮城市污水处理工艺.试验结果表明,当溶解氧(DO)质量浓度为2 mg.L-1、水力停留时间为8 h、悬浮填料填充率为50%时,MBBR工艺可通过同步硝化反硝化实现90%以上的脱氮效果.生物膜内DO质量浓度梯度造成好氧和缺氧区是实现同步硝化和反硝化的关键.该工艺能在同一个反应器中实现同时硝化和反硝化,并达到两个过程的动力学平衡,大大简化了生物法脱氮的工艺流程,提高了生物脱氮的效率,并节省投资.
The moving bed biofilm reactor （MBBR）, where the biomass is attached to small plastic carrier elements that move freely along with the water in the reactor, has been tested for simultaneous nitrification and denitrification （SND） for municipal wastewater. The SND can be successfully established at dissolved oxygen （DO） of about 2 mg·L^-1, and above 90% of total nitrogen （TN） removal efficiency through SND has been found in the system. It seems that a physical phenomenon is responsible for SND in the MBBR, in particular the oxygen diffusion limitation. The system＇s performance indicates that a single stage aerobic biofilm can be developed to meet the increasingly stringent regulations on effluent nitrogen discharges, which affords several advantages over the conventional systems.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期514-517,538,共5页
Journal of Tongji University:Natural Science
基金
国家"八六三"高技术研究发展计划资助项目(2002AA601320)
污染控制与资源化研究国家重点实验室开放课题(PCRRF04008)
湖北省废物地质处置与环境保护重点实验室开放课题(HBWDEP-2003-06)
关键词
生物处理
悬浮填料
生物膜
脱氮
biological treatment
suspended carrier
biofilm
denitrification
