曝停时间比对间歇曝气SBR短程硝化的影响  

Effects of different ratios of aeration time and anaerobic time on shortcut nitrification in the intermittent aeration SBR

作　　者：苏东霞[1] 李冬[1] 张肖静[2] 张功良[1] 周元正[1] 张杰[1,2] 

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《中国环境科学》2014年第5期1152-1158,共7页China Environmental Science

基　　金：新世纪优秀人才支持计划(NCET-10-0008);国家水体污染控制与治理科技重大专项(2012ZX07202-005)

摘　　要：常温条件下（20--25℃）,以生活污水为研究对象,采用间歇曝气序批式反应器1#、2#、3#,研究了不同曝停时间比（3：1、3：2、3：3）对亚硝酸盐氮积累、亚硝化稳定性、污染物去除效果及污泥沉降性能的影响.结果表明,在一定范围内,单元停曝时间所占比例越大,即曝停时间比越小越有利于亚硝酸盐氮的积累,启动速度越快,三者分别经35,30,29d 实现了亚硝化的启动；稳定运行阶段,三者的氨氮容积去除负荷分别为0.57,0.48,0.40d-1,曝停时间比越小,则氨氮去除负荷越小,COD去除效果没有明显区别；1#运行至第82d时,亚硝化率呈现逐渐下降的趋势,2#、3#仍能稳定运行,因此曝停时间比越小,越有利于抑制NOB的增殖,维持亚硝化的稳定,且污泥沉降性能越好,越有利于抑制丝状菌污泥膨胀.Under room temperature （20--25℃）, in intermittent aeration sequencing batch reactors 1 #, 2 #, 3 #, it was studied that effects of different ratios of aeration time and anaerobic time （3：1, 3：2, 3：3） on the nitrite accumulation, the stability of nitrosation, the pollutants removal efficiency and sludge settling performance with domestic wastewater. The smaller the ratio of aeration time and anaerobic time within a certain rangeis,the more beneficial to the accumulation of nitriteis.It realized the start-up of nitrosation by 35d, 30d, 29d respectively.In stable operation stage, the removal of ammonia nitrogen volume of load were 0.57, 0.48, 0.40kgN/m3 drespectively.The smaller the ratio of aeration time and anaerobic timeis,the smaller ammonia nitrogen removal load was. The differences of COD removal effect were not obvious.At 82d the nitrosation rate of 1# showed a trend of gradual decline, but it had a stable operation in 2 #, 3 #.So the smaller the ratio of aeration time and anaerobic timeis , the more conducive to maintain the stability of nitrosation, and the better sludge settling performance was.

关 键 词：曝停时间比 间歇曝气 短程硝化 

分 类 号：X703.1[环境科学与工程—环境工程]