生物膜反应器组合工艺对COD、氮类物质去除研究

针对北方冬季寒冷低温条件下,废水中COD、氮类物质降解效果低下的缺点,采用生物膜反应器脱氮组合工艺,投加一定比例悬浮性填料,在温度12℃以下进行小试研究,结果显示,HRT=18h,污泥回流比Qr=200%,混合液回流比Qr=80%,控制填料填充率在35%,曝气溶解氧控制在2~3mg/L,能够使出水中的COD、NH_3-N和TN达到国家一级A标准。

Study on removal of COD and nitrogen compounds by combined process of biofilm reactor

In the cold northern winter low temperature conditions,COD in wastewater,nitrogen compounds degradation inferior by biofilm reactor nitrogen removalprocess,adding a certain proportion of suspended filler for laboratory study,at a temperature of 12,results showed that HRT=18 h,the sludge reflux ratio Qr=200%,reflux ratio Qr=80%,control the filling ratein 35%,aeration dissolved oxygen control in 2-3 mg/L,can make the effluent COD,NH_3-N and TN meet the national standard A.