氨氮浓度对马铃薯加工废水厌氧消化的影响  

Effects of ammonia nitrogen concentration on anaerobic digestion of potato processing wastewater

作　　者：王红艳[1,2,3] 郁达伟 孟晓山[1,2] 张俊亚 魏源送 钟慧[1,2,3] WANG Hongyan;YU Dawei;MENG Xiaoshan;ZHANG Junya;WEI Yuansong;ZHONG Hui(State Key Joint Laboratory of Environmental Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Laboratory of Water Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Energy,Jiangxi Academy of Sciences,Nanchang 330029,China)

机构地区：[1]中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京100085 [2]中国科学院生态环境研究中心,水污染控制实验室,北京100085 [3]中国科学院大学,北京100049 [4]江西省科学院能源研究所,南昌330029

出　　处：《环境工程学报》2020年第10期2677-2688,共12页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07106003-002);国家自然科学基金资助项目(2167070464);江西省重点研发计划项目(20171ACG70018)。

摘　　要：为考察氨氮浓度对中温厌氧消化处理马铃薯加工废水的影响,通过批式实验,探究该类废水厌氧消化处理的氨氮抑制阈值。结果表明:氨氮浓度为3000 mg·L^-1(TAN≈3659 mg·L^-1)时,累积产甲烷量降低至276.1 mL·g-1且出现产甲烷迟滞期;氨氮浓度为4000 mg·L^-1(TAN≈4468 mg·L^-1)时,累积产甲烷量仅为对照组的39.2%,迟滞期明显延长了7.2 d;高浓度氨氮抑制造成了以丙酸为主的VFAs积累和有机物(蛋白质等)降解不完全,这是COD去除率下降的主要原因;VFAs作为氨氮抑制发生时COD的主要组分,其积累可作为马铃薯加工废水厌氧消化过程发生氨氮抑制的指示因子;马铃薯加工废水中温厌氧消化的氨氮阈值约为3000 mg·L^-1。该结果可为马铃薯加工废水的高效处理与资源化利用提供参考。To investigate the effects of ammonia concentration on mesophilic anaerobic digestion of potato processing wastewater,the batch tests of biochemical methane potential(BMP)were applied to quantify its threshold value of the ammonia inhibition.Results showed that the cumulative methane production decreased to276.1 mL·g-1 at 3000 mg·L^-1 of ammonia nitrogen(TAN≈3659 mg·L^-1),and the lag period of methane production appeared.At 4000 mg·L^-1(TAN≈4468 mg·L^-1)of ammonia nitrogen,the cumulative methane production was only 39.2%of that of the control group,and the lag period was prolonged by 7.2 d.The inhibition of high ammonia nitrogen concentration caused the accumulation of VFAs dominated by propionate and the incomplete degradation of organic matters i.e.protein,which also could be main reasons for the decrease of COD removal efficiency.The accumulation of VFAs could be used as an indicator for ammonia inhibition in the anaerobic digestion of potato processing wastewater because VFAs are the main components of COD when ammonia inhibition occurs.The threshold value of ammonia inhibition during the mesophilic anaerobic digestion of potato processing wastewater was around 3000 mg·L^-1.The study provides a reference for the high efficient treatment and comprehensive utilization of potato processing wastewater.

关 键 词：马铃薯加工废水 厌氧消化 氨氮抑制 丙酸 

分 类 号：X703[环境科学与工程—环境工程]