氯酸钾对部分亚硝化反应影响的试验研究  

Effect of KClO_3 on partial nitrosification reaction

作　　者：李亚峰[1] 于佳辉 张文文[1] 叶友林[1] Li Yafeng;Yu Jiahui;Zhang Wenwen;Ye Youlin(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《供水技术》2018年第3期9-12,17,共5页Water Technology

基　　金：辽宁省教育厅科学研究项目(LJZ2016004)

摘　　要：研究了KClO_3对亚硝化反应和脱氮效果的影响,确定了实现亚硝酸盐累积的适宜抑制浓度。采用人工配水,控制反应温度为30℃、p H值为7~8、曝气强度为200 m L/min,匀速慢速搅拌,进水NH_4^+-N为50 mg/L,通过动态试验考察了KClO_3浓度对NH_4^+-N去除和NO-2-N累积效果的影响,并确定了NOB菌群的最佳抑制浓度。结果表明,NH_4^+-N去除率随KClO_3浓度的升高显著降低,但8 h后6组试验的NH_4^+-N去除率均在80%以上,无明显差异;当KClO_3浓度为2 mmol/L时,NO-2-N累积浓度高达15.73 mg/L。KClO_3的抑制作用具有选择性,可实现NO-2-N的快速累积,但浓度过高会导致AOB细菌受到毒害,影响系统整体脱氮效果。The effects of KClO3 on nitrosification and denitrification were investigated,and the suitable inhibitory concentration for nitrite accumulation was determined. Using synthetic wastewater,the effect of KClO3 dose on NH4^＋-N removal and NO-2-N accumulation was investigated by dynamic test,and the optimal inhibitory concentration of NOB microflora was identified under the condition of temperature at30 ℃,p H at 7-8,aeration intensity at 200 m L/min,constant speed and slow stirring and the influent NH4^＋-N of 50 mg/L. The results showed that the removal rate of NH4^＋-N decreased significantly with the increase of KClO3 dose,but the removal rate of NH4^＋-N in all 6 groups was all above 80%,and there was no obvious difference after 8 h. When the concentration of KClO3 was 2 mmol/L,the cumulative concentration of NO-2-N reached 15. 73 mg/L. The inhibitory effect of KClO3 was selective,and the rapid accumulation of NO-2-N could be realized,but the high concentration of AOB could have toxic action on the bacteria and influence the overall denitrification effect in the system.

关 键 词：氯酸钾 部分亚硝化 抑制剂 脱氮 去除 积累 

分 类 号：X703.1[环境科学与工程—环境工程]