摘要
采用后置反硝化曝气生物滤池处理模拟生活污水,在保证出水COD达标排放的前提下,分别向二级缺氧滤柱中投加20 mg/L的甲醇和引入0.2Q(Q为试验中系统进水的流量)的原水作为外碳源,考察了投加外碳源对系统脱氮及去除COD的影响。试验结果表明,在二级缺氧滤柱中投加20 mg/L的甲醇作为外碳源时,系统出水的NH4+-N、TN、COD平均浓度分别为5.6、8、35.8 mg/L,其去除率分别为83.6%、81%、83.5%;在二级缺氧滤柱中引入0.2Q的原水作为外碳源时,系统出水的NH4+-N、TN、COD平均浓度分别为13.9、18.3、47.7 mg/L,去除率分别为59%、56.6%、78.1%。系统采用甲醇比引入原水作为外碳源的脱氮效果好且出水的COD浓度较低。
Post-denitrification biological aerated filter was used to treat simulated domestic wastewater. Under the premise of ensuring the effluent COD to meet the discharge standard, 20 mg/L methanol and 0.2Q （ Q was the influent flow of the system） raw wastewater were added into two secondary anoxic filtration columns respectively. The influence of additional carbon source on the nitrogen and COD removal was investigated. The results indicate that when 20 mg/L methanol is used as the external carbon source, the average concentrations of NH4^＋ - N, TN and COD in the effluent are 5.6 rag/L, 8 mg/L and 35.8 mg/L, and their removal rates are 83.6% , 81% and 83.5% respectively. When 0.2Q raw wastewater is used as the external carbon source, the average concentrations of NH4 - N, TN and COD in the effluent are 13.9 mg/L, 18.3 mg/L and 47.7 mg/L, and their removal rates are 59% , 56.6% and 78.1% respectively. Compared with the raw wastewater, methanol, as the external carbon source has better removal efficieneies of nitrogen and COD.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第19期45-47,共3页
China Water & Wastewater
关键词
后置反硝化曝气生物滤池
脱氮
外碳源
甲醇
post-denitrification biological aerated filter
nitrogen removal
external carbon source
methanol
