化工进展2012，Vol.31Issue(3)：693-698,6.
进水负荷与硝化液回流比对低污泥浓度A~2/O工艺脱氮效果的影响
Effect of influent loading and reflux ratio on de-nitrification under low sludge concentration
摘要
Abstract
A long-term continuous experiment of simulated wastewater was carried out using A2/O process and effect of influent loading and reflux ratio on the removal efficiency of nitrification was investigated at low MLSS of（1500±200） mg/L.The results show that the influent loading increases gradually from 5.03 gCOD/（gMLSS.d）to 10.05 gCOD/（gMLSS·d）and removal efficiency of COD is higher than 95% when influent loading is changed by adjusting influent flow rate.Removal efficiency of NH4＋-N increases from 69.59% to 95% and removal efficiency of TN increases from 53.53% to 80%,respectively.Furthermore,when influent loading is enhanced to 20.31 gCOD/（gMLSS.d）,removal efficiencies of NH4＋-N and TN decrease to 50% and 40%,respectively. The influent loading increases from 10.05 gCOD/（gMLSS.d） to 124.11 gCOD/（gMLSS·d） when influent loading is changed by adjusting influent COD.Removal efficiencies of COD and NH4＋-N are all higher than 90% and removal efficiency of TN increases gradually from 70% to 80%,respectively.When the reflux ratio of mixture is 300%,200% and 100%,respectively,removal efficiencies of COD and NH4＋-N are less affected by reflux ratio.Removal efficiencies of COD and NH4＋-N are higher than 90% and 95%,respectively.And meantime,removal efficiency of TN drops with the increasing reflux ratio,which is greatly influenced by reflux ratio.When the internal reflux ratio is 100%,removal efficiency of TN reaches the highest and it is higher than 80%.关键词
A2/O/污泥浓度/进水负荷/混合液回流比Key words
A2/O/sludge concentration/influent loading/reflux ratio of mixture分类
资源环境引用本文复制引用
张兰河,王璐瑶,张万友,王旭明..进水负荷与硝化液回流比对低污泥浓度A~2/O工艺脱氮效果的影响[J].化工进展,2012,31(3):693-698,6.基金项目
城市水资源与水环境国家重点实验室开放基金 （）
吉林省科技发展计划社会发展重点项目 （）
