摘要
以实际生活污水为处理对象,利用两个SBR反应器(分别标记为1#和2#反应器)控制不同运行条件进行好氧亚硝化对比试验,研究了低氨氮生活污水的好氧亚硝化特性。其中,1#反应器恒温加热浓缩污泥,加热温度为36℃、加热时间为40 min;2#反应器延长曝气时间及污泥龄,但不加热浓缩污泥。结果表明,1#反应器出水亚硝态氮浓度最终稳定在30～35 mg/L,占三氮总和的75%～80%,平均亚硝化率为88.08%;2#反应器自第2天起亚硝化率就降为零,平均出水硝态氮浓度为30.68 mg/L,表现为全程硝化。可见,通过控制反应器中浓缩污泥的运行条件可实现低氨氮污水的好氧亚硝化。此外,维持系统中适当的COD水平也有助于低氨氮生活污水好氧亚硝化的实现。
Taking actual domestic sewage as treatment object, a comparative test was done by controlling different operation conditions of two SBR reactors （ 1# and 2#） to study the characteristics of aerobic nitrosation of domestic sewage with low ammonia nitrogen. The thickened sludge was heated at a constant temperature of 36℃ for 40 min in 1# reactor while the aeration time and sludge age were prolonged and the thickened sludge was not heated in 2# reactor. The results show that the nitrite concentration in the effluent from 1# reactor is stabilized at 30 to 35 mg/L, accounting for 75% to 80% of total of three nitrogens, and the average nitrosation rate is 88.08%. The nitrosation rate of 2# reactor is decreased to 0 from the 2nd day and the effluent nitrate concentration is 30.68 mg/L. The reaction type of this reactor is complete nitrification. It is concluded that the aerobic nitrosation in low ammonia nitrogen sewage can be achieved by controlling the thickened sludge condition in reactor. In addition, maintaining a proper COD concentration also helps to achieve the aerobic nitrosation in low ammonia nitrogen sewage.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第11期63-65,68,共4页
China Water & Wastewater
关键词
低氨氮生活污水
好氧亚硝化
SBR反应器
domestic sewage with low ammonia nitrogen
aerobic nitrosation
SBR
