摘要
为研究不同缺氧好氧比对半亚硝化稳定性的影响,采用连续流反应器,在常温(22~25℃),DO(0.3~0.5mg/L)和FA协同作用下实现了全亚硝化后,转变进水为AO除磷二级出水,并逐步向半亚硝化过渡.在此过程中考察了不同缺氧好氧比(0:1、1:1、2:1和3:1)对半亚硝化稳定性的影响.结果表明,缺氧好氧比为0:1时,很难维持低NH_4^+-N(40~70mg/L)亚硝化的稳定,缺氧好氧比为1:1、2:1、3:1时均能维持稳定的半亚硝化效果,相比之下缺氧好氧比为3:1时更加节能;在缺氧好氧比0:1,1:1,2:1,和3:1的过程中,氨利用速率分别提高了29.57%、44.27%、45.23%、49.63%.在整个过程中污泥沉降性能良好,SVI在65~130m L/g.
In order to investigate different anoxic/aerobic ratio on stability of partial nitritation（PN）, continuous flow reactor was used at room temperature（22~25℃）. After complete nitritation（CN） was achieved through controlling FA and DO（0.3~0.5mg/L）, the effluent of Anaerobic/Oxic（A/O） process removing phosphorous wastewater was used as influent to CN. Then, CN turned to PN gradually. The influence of different anoxic/aerobic volume ratios（0：1,1：1,2：1,3：1） on stability of PN was investigated. It demonstrated that PN was difficult to mantain when treating domestic sewage containing low ammonia nitrogen（40~70mg/L） at the ratio of 0：1.However, stable PN could be maintained when the ratios were 1：1, 2：1 and 3：1. The ratio of 3：1 was more efficient than the others. In the process of 0：1, 1：1, 2：1 and 3：1, ammonia utilization rate increased by 29.57%、44.27%、45.23%、49.63%, respectively. During the whole operating period, the settleability of sludge was good with volume Index（SVI） being 65~130m L/g.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2016年第6期1724-1731,共8页
China Environmental Science
基金
北京市青年拔尖团队项目
关键词
生活污水
半亚硝化
缺氧好氧比
氨利用速率
domestic sewage
partial nitritation
anoxic/aerobic ratio
ammonia utilization rate
