摘要
针对污水处理厂目前普遍存在碳源不足和剩余污泥量过大的问题,以某小区低ρ(C)/ρ(N)比生活污水为研究对象,构建了多级好氧缺氧生物膜反应器,考察了反应器脱氮、污泥减量效果及运行工况.试验表明反应器最优运行工况:流量分配比为3∶4∶3,HRT为11 h,ρ(DO)为4.0 mg/L,温度为25℃,回流比R=1.0.在上述工况下,当进水ρ(TN)、ρ(NH4+-N)、ρ(COD)分别为80～130、75～100、260～400 mg/L时,ρ(TN)出水约20 mg/L,ρ(NH4+-N)、ρ(COD)出水分别降至5.0、30 mg/L以下,TN、NH4+-N、COD平均去除率分别达到80%、95%、91%.多级好氧缺氧试验同时表明:反应器中的污泥产率仅为0.10,优于其他生物膜工艺,具有良好的污泥减量效果.
In order to solve problems of insufficient carbon sources during biological denitrification and too much surplus sludge in wastewater treatment plant, a multi-aerobic-anoxic bio-film reactor was built to treat low ρ（C）/ρ（N） ratio wastewater in a community. The reactor could achieve its optimal results when flow distribution ratio was 3：4： 3, HRT was 11 h, ρ（DO） was 4.0 mg/L, temperature was at 25 ℃, and reflux ratio R=1.0. Under above conditions, whenρ（TN）,ρ（NH4-N） andρ（COD） in raw water was 80 - 130, 75 - 100 and 260 -400 mg/L, respectively, removal efficiency of TN, NH4^＋ -N and COD reached 80% ,95% and 91% , respectively, ρ（TN） in effluent was about 20 mg/L, ρ（NH4-N） and ρ（COD） in effluent was dropped to below 5.0 mg/L and 30 mg/L, respectively. The results also showed that the sludge production rate was only 0.10, which was superior to other bio-film processes. So the effect sludge reduction was significant.
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2013年第9期1405-1412,共8页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(51078008)
北京市科技创新平台资助项目(004000546612010)
北京市自然科学基金资助项目(8122005)
北京市教委重点基金资助项目(KZ201110005008)
关键词
好氧
缺氧
生物膜
生物脱氮
污泥减量
aerobic
anoxic
bio-film
nitrogen removal
sludge reduction
