摘要
针对低碳源生活污水(COD/TN<5,COD<180 mg/L)的脱氮尤其是除磷效果差的问题,通过控制污泥外循环侧流除磷、分段进水、好氧/缺氧交替运行的SBR工艺的曝气量,实现了碳源的合理分配,获得了良好的脱氮除磷效果。控制曝气量为3.57 m3/(h.m3),在进水COD、氨氮、TN、TP平均浓度分别为121、29、31.4、4.6 mg/L的条件下,对各污染物的去除率分别为86%、98.6%、61.7%、93.6%。研究还发现,通过污泥外循环强化厌氧释磷可破坏聚磷菌的贮磷平衡,1次/d的污泥外循环侧流除磷不但保障了系统的除磷效果,还简化了侧流除磷工艺的运行过程。
In order to solve the issue of poor efficiency of nitrogen removal especially phosphorus removal from low-carbon source wastewater （COD/TN 〈5, COD 〈 180 mg/L） , the aeration rate of SBR operated under external sludge recycle for side-stream phosphorus removal, step feed and alternating aer- obic-anoxic conditions was controlled to achieve a rational distribution of carbon source and good nitrogen and phosphorus removal effect. When the aeration rate is controlled at a level of 3.57 ma/（h · m3） , and the average concentrations of COD, ammonia nitrogen, TN and TP are 121 mg/L, 29 mg/L, 31.4 mg/L and 4.6 mg/L respectively, the removal efficiencies of the pollutants are 86%, 98.6%, 61.7% and 93.6% respectively. The phosphorus storage balance in PAOs is broken by enhancing anaerobic phos- phorus release with external sludge recycle. The once-a-day external sludge recycle for side-stream phos- phorus removal can ensure the phosphorus removal effect and simplify the operation course of side-stream phosphorus removal process.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第19期5-9,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2008ZX07315)
重庆市重大科技专项(CSTC
2008AB7133)
关键词
曝气量
污泥外循环
侧流除磷
分段进水SBR
低碳源污水
脱氮除磷
aeration rate
external sludge recycle
side-stream phosphorus removal
stepfeed SBR
low-carbon source wastewater
nitrogen and phosphorus removal
