中南大学学报（自然科学版）2011，Vol.42Issue(8)：2520-2525,6.
两级UASB-A/O-SBR工艺深度处理晚期垃圾渗滤液
Advanced treatment of mature landfill leachate by two-stage UASB-A/O-SBR process
摘要
Abstract
A combined process of a two-stage up-flow anaerobic sludge blanket (UASB), an anoxic/aerobic (A/O) reactor and a sequencing batch reactor (SBR) was used to treat mature landfill leachate, and the influencing factors on short-cut nitrification in A/O reactor were also researched. The operational mode of the process was as follows: Denitrification took place in the first stage UASB (UASB1). The residual nitrite and nitrate of UASB 1 by using the residual chemical oxygen demand (COD) was further removed in the second stage UASB (UASB2). The ammonia nitrogen was removed by short-cut nitrification in the aerobic zone of A/O reactor. The nitrite and nitrate produced from the nitrification were removed in SBR. The experiment results show that the COD and ammonia nitrogen mass concentrations of raw leachate are about 3.0 g/L and 2.0 g/L, respectively. The influent leachate is mixed by raw leachate as well as domestic wastewater in a ratio of 1. The external carbon source (sodium acetate anhydrous) is added in order to enhance the p(C)/p(N) ratio from 1.7 to 3.0. Through the cooperative inhibition of the free ammonia (FA) and free nitrite acid (FNA), the short-cut nitrification is achieved stably in the A/O reactor with more than 70% of the nitrite accumulation ratio. The nitrite and nitrate produced from the nitrification could be removed completely in SBR. The ammonia mass concentration of final effluent is less than 2 mg/L, and its removal efficiency is 99%. The total nitrogen mass concentration of final effluent is about 26 mg/L, and its removal efficiency is about 98%.关键词
晚期垃圾渗滤液/生活污水/短程硝化/UASB/A/O/SBR/FA/FNAKey words
mature landfill leachate/ domestic wastewater/ short-cut nitrification/ UASB/ A/O/ SBR/ FA/ FNA分类
资源环境引用本文复制引用
吴莉娜,宋燕杰,刘牡,张树军,彭永臻..两级UASB-A/O-SBR工艺深度处理晚期垃圾渗滤液[J].中南大学学报（自然科学版）,2011,42(8):2520-2525,6.基金项目
北京市自然科学基金重点项目(8091001) （8091001）
国家自然科学基金资助项目(50978003) （50978003）
