喷射环流反应器处理垃圾渗滤液的硝化特性研究  

Characteristics of nitrification in jet loop reactor system for landfill leachate treatment

作　　者：张雄军 张保山 ZHANG Xiongjun;ZHANG Baoshan(Changsha Zoomlion Environmental Industry Co.,Ltd.,Changsha 410221,China)

机构地区：[1]长沙中联重科环境产业有限公司,湖南长沙410221

出　　处：《工业水处理》2023年第2期154-160,共7页Industrial Water Treatment

摘　　要：采用喷射环流反应器处理实际垃圾渗滤液,重点研究了系统的氨氮硝化性能,分别考察了游离氨(FA)和游离亚硝酸(FNA)对氨氧化菌(AOB)和亚硝态氮氧化菌(NOB)活性的影响。结果表明,AOB菌群活性在FA质量浓度<6.5 mg/L、FNA质量浓度<0.1 mg/L时不受影响;在FNA质量浓度>0.1 mg/L时受到一定抑制但仍有较大活性。NOB菌群活性在FA质量浓度<3 mg/L且FNA质量浓度<0.01 mg/L时基本不受影响;在FA质量浓度>3 mg/L或FNA质量浓度>0.01 mg/L时受到明显抑制,且抑制作用随FA、FNA浓度升高呈增大趋势。碱度(碱度/氨氮需>7 g/g)对AOB有较大影响,而对NOB基本无影响。喷射环流反应器的氧转移效率可达45%,硝化速率可达0.06 g/(g·d),相较于传统MBR硝化单元具有氧转移效率和硝化效率高、水力停留时间短、占地面积小、能耗低的优点。The biological system of jet loop reactor was used to treat the actual landfill leachate.The ammonia nitrogen nitrification performance of the system was emphatically studied.The effects of free ammonia(FA)and free nitrite(FNA)on the activity of ammonia oxidizing bacteria(AOB)and nitrite oxidizing bacteria(NOB)were investigated respectively.The results indicated that the activity of AOB flora was not affected when FA mass concentration was less than 6.5 mg/L and FNA mass concentration was less than 0.1 mg/L.When the mass concentration of FNA was greater than 0.1 mg/L,it was inhibited to some extent but still had greater activity.The activity of NOB flora was not affected when FA mass concentration was less than 3 mg/L and FNA mass concentration was less than 0.01 mg/L.When FA mass concentration was more than 3 mg/L or FNA mass concentration was more than 0.01 mg/L,its activity was significantly inhibited,and the inhibition increased with the increase of FA and FNA concentration.Alkalinity(alkalinity/ammonia nitrogen should be more than 7 g/g)had a great influence on AOB,but had little influence on NOB.The oxygen transfer efficiency of the jet loop reactor could reach 45%,and the nitrification rate could reach 0.06 g/(g·d).Compared with the traditional MBR nitrification unit,the jet loop reactor had the advantages of high oxygen transfer efficiency and nitrification efficiency,short hydraulic retention time,small floor area and low energy consumption.

关 键 词：喷射环流反应器 游离氨 游离亚硝酸 氧转移效率 硝化速率 

分 类 号：X703[环境科学与工程—环境工程]