垃圾渗滤液短程硝化反硝化脱氮试验研究  

Short-term nitrification and de-nitrification test for landfill leachate

作　　者：张周[1,2,3] 江臣礼 张炜 萧壮波 黄兴 华天予 施万胜 ZHANG Zhou;JIANG Chen-li;ZHANG Wei;XIAO Zhuang-bo;HUANG Xing;HUA Tian-yu;SHI Wan-sheng(School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,Jiangsu,China;Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology,Wuxi 214122,Jiangsu,China;Wuxi Tsingda Biotech Environmental Engineering Co.,Ltd.,Wuxi 214072,Jiangsu,China;Wuxi City Environmental Technology Co.,Ltd.,Wuxi 214026,Jiangsu,China)

机构地区：[1]江南大学环境与土木工程学院,江苏无锡214122 [2]江苏省厌氧生物技术重点实验室,江苏无锡214122 [3]江苏省生物质能与减碳技术工程实验室,江苏无锡214122 [4]无锡轻大百特环保工程有限公司,江苏无锡214072 [5]无锡城市环境科技有限公司,江苏无锡214026

出　　处：《安全与环境学报》2020年第3期1083-1089,共7页Journal of Safety and Environment

基　　金：水体污染控制与治理科技重大专项(2017ZX07204-002)。

摘　　要：为了研究厌氧-微氧-好氧系统对垃圾渗滤液厌氧出水高效生物脱氮性能,基于短程硝化反硝化技术,设置5个阶段分析DO质量浓度(0. 2~1. 5 mg/L)、进水C/N(4~8)和亚硝化液回流比(300%~1 500%)对系统的影响,同时,通过快速提高进水NH4+-N负荷进一步研究反应器抗负荷冲击能力。结果表明,微氧区添加5 mmol/L KClO3,能够快速提升系统亚硝化率;微氧区DO质量浓度保持0. 5~1. 0mg/L,亚硝化率高于90%。提高进水C/N和亚硝化液回流比(R)有利于反硝化过程充分进行,好氧池的设置能够使系统保持较高的COD和NH4+-N去除率,整个过程系统COD、NH4+-N和TN的平均去除率分别达89. 2%、98. 6%和82. 3%。此外,系统在短期负荷冲击下污染物去除率降低,当进水NH4+-N负荷快速提升时,TN去除率由90%下降到76%。然而,经过10 d的恢复期,系统可以恢复到原来的状态,并具有较高的性能。The paper is inclined to examine and determine the biological denitrification efficiency of the anaerobic leachate effluent through the anaerobic-microaerobic-aerobic system and the nitrosation process control by adding KClO3 based on the shortterm nitrification and denitrification technology. To trace and examine the effect of DO concentration rate (0. 2-1. 5 mg/L),the influent C/N ratio (4-8) and the internal nitrosation reflux ratio (300%-1 500%) on the system performance,the operation can be divided into and indicated by 5 stages. At the same time,the loading shock resistance capacity of the reactor should be further investigated by the quick increase of the NH4+-N loading rate. Thus,the results prove that the above said system can help to effectively distribute and utilize the influent of denitrification of the carbon source to get rid of the inefficiency of the carbon source attending the given process. On the other hand,it is also possible to keep the entire process stable under the condition of the balance of alkalinity due to the fact that the p H value can be kept balanced,too. What is more,the activity of the nitrite-oxidizing bacteria can be effectively inhibited by adding 5 mmol/L of KClO3 to the micro-aerobic stage to promote the accumulation of nitrite and the fast increase of the NO2--N accumulation ratio in the system. However,since the DO concentration is a key parameter for the stable nitrosation reaction,the NO2--N accumulation ratio should be kept higher than 90% in the microaerobic stage when the DO concentration rate remains at 0. 5-1. 0 mg/L. What is more,the influent C/N ratio and the nitrosation reflux ratio are important for COD removal of NH4+-N and TN,and the influent C/N ratio increase and that of the nitrosation reflux are beneficial for denitrification process and TN removal. And,in the 5 operation stages,the average removal rates of COD,NH4+-N,and TN can be increased to reach the percentages of 89. 2%,98. 6%,and 82. 3%,respectively,which indicate that the anaerobic-micro-aerobic-a

关 键 词：环境工程学 生物脱氮 短程硝化反硝化 垃圾渗滤液 

分 类 号：X703.1[环境科学与工程—环境工程]