摘要
常温连续流条件下,分别在两个反应器中投加悬浮填料和接种好氧颗粒污泥,通过控制工艺条件,两个反应器中均实现了同步硝化反硝化(SND)。改变进水溶解氧DO浓度、碳氮比(C/N)、有机负荷和NH4+-N负荷,分析比较了两个反应器脱氮的重要工艺条件。试验结果表明,在相同的工艺条件下,悬浮填料脱氮最佳DO浓度为1.0mg/L左右,最佳C/N为12;好氧颗粒污泥脱氮最佳DO浓度为1.5mg/L,最佳C/N为5。提高进水有机负荷,两个反应器COD去除率均稳定在较高的水平。NH4+-N浓度升高时,反应器脱氮效率均降低,好氧颗粒污泥比悬浮填料更耐冲击负荷。
Effect on nitrogen removal in a suspended carrier reactor and an aerobic granule reactor with continuous flow was discussed.Under the temperature 23～24℃,simultaneous nitrification and denitrification occurred in two reactors.Influence of some operation parameters including DO concentration,ratio of C/N,COD and NH4^＋-N concentration was analyzed.Results showed for the suspended carrier,the optimum value of DO concentration was about 1.0mg/L and ratio of C/N was 12 while for the aerobic granule,the optimum value of DO concentration was about 1.5mg/L and ratio of C/N was 5.Organic carbon concentration had little effect on COD removal.Improving NH4^＋-N concentration could lower nitrogen removal efficiency.Aerobic granule was appropriate to treat wastewater with high NH4＋-N concentration.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第8期160-163,共4页
Environmental Science & Technology
关键词
连续流
悬浮填料
好氧颗粒污泥
脱氮
continuous flow
suspended carrier
aerobic granular sludge
nitrogen removal
