AO-MBR工艺短程硝化反硝化处理垃圾渗滤液中试研究
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摘要
为了解决垃圾渗滤液在无外加碳源的条件下难以实现高效生物脱氮的问题,采用中试规模的A/O-MBR反应器,通过实现短程硝化反硝化去除垃圾渗滤液中的高浓度有机物和氮化物,并考察反应器系统对水质变化的适应能力以及不同进水碳氮比时的去除效果.实验结果表明:在进水氨氮质量浓度为1 500 mg/L、碳氮比为2∶1、水力停留时间(HRT)为4.21 d的条件下,COD和TN去除率均达到80%以上,说明系统实现了低碳氮比垃圾渗滤液高效生物脱氮.
For the landfill leachate treatment,it is hard to achieve nitrogen removal effectively without external addition of organic carbon source. To solve this engineering problem,a pilot-scale AO-MBR process was developed in this study to remove the high loading organics and nitrogen by nitritationdenitritation in raw municipal landfill leachate. The stability and performance of the pilot-scale AO-MBR process under different influent ρ( C)/ρ( N) mass ratios were investigated. The results of this study showed that the removal efficiencies of COD and TN were above 80% with influent ammonia concentration of 1 500 mg/L,ρ( C)/ρ( N) mass ratio of above 2,and hydraulic retention time( HRT) of 4. 21 d. It indicates that the pilot-scale AO-MBR process successfully achieves efficient biological removal of ammonia from raw landfill leachate with low ρ( C)/ρ( N) mass ratio.
For the landfill leachate treatment,it is hard to achieve nitrogen removal effectively without external addition of organic carbon source. To solve this engineering problem,a pilot-scale AO-MBR process was developed in this study to remove the high loading organics and nitrogen by nitritationdenitritation in raw municipal landfill leachate. The stability and performance of the pilot-scale AO-MBR process under different influent ρ( C)/ρ( N) mass ratios were investigated. The results of this study showed that the removal efficiencies of COD and TN were above 80% with influent ammonia concentration of 1 500 mg/L,ρ( C)/ρ( N) mass ratio of above 2,and hydraulic retention time( HRT) of 4. 21 d. It indicates that the pilot-scale AO-MBR process successfully achieves efficient biological removal of ammonia from raw landfill leachate with low ρ( C)/ρ( N) mass ratio.
引文
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[9]黄志聪.A/O/N-Fenton-BAF组合工艺处理垃圾焚烧厂渗滤液的研究[D].广州:华南理工大学,2013.HUANG Z C.Study of the leachate treatment for waste incineration plant by A/O/N-Fenton-BAF process[D].Guangzhou:South China University of Technology,2013(in Chinese)
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[2]杨学志,王一了,夏晓虹,等.溶解氧对晚期垃圾渗滤液短程硝化及微生物群落结构变化的影响[J].环境污染与防治,2012,34(11):14-19.YANG X Z,WANG Y L,XIA X H,et al.Effect of dissolved oxygen on the shortcut nitrification of aged landfill leachate and microbial community structure[J].Environmental Pollution&Control,2012,34(11):14-19.(in Chinese)
[3]MASSE A,SPERANDIO M,CABASSUD C.Comparison of sludge characteristics and performance of a submerged membrane bioreactor and an activated sludge process at high solids retention time[J].Water Research,2006,40(12):2405-2415.
[4]HU S W,YANG F L,SUN C.Simultaneous removal of COD and nitrogen using a novel carbon-membrane aerated biofilm reactor[J].Journal of Environmental Sciences,2008,20:142-148.
[5]吴丽娜.厌氧-好养处理垃圾渗滤液与短程深度脱氮[D].北京:北京工业大学,2011.WU L N.Advanced nitrogen removal via nitrite from landfill leachate by the anaerobic-aerobic combined process[D].Beijing:Beijing University of Technology,2011.(in Chinese)
[6]FUX C,VELTEN S,CAROZZI V,et al.Efficient and stable nitritation and denitritation of ammonium-rich sludge dewatering liquor using an SBR with continuous loading[J].Water Research,2006,40(14):2765-2775.
[7]范美霖,张云霞,张劲松,等.生物强化MBR-AF工艺短程硝化反硝化研究[J].环境科学学报,2012,32(8):1814-1821.FAN M L,ZHANG Y X,ZHANG J S,et al.The performance of bioaugmented MBR-AF process for nitritation and denitritation[J].Acta Scientiae Circumstantiae,2012,32(8):1814-1821.(in Chinese)
[8]高峰.MBR+NF+RO工艺处理垃圾渗滤液生产性试验研究[D].武汉:武汉理工大学,2014.GAO F.The productive study of landfill leachate treatment by MBR+NF+RO processes[D].Wuhan:Wuhan University of Technology,2014.(in Chinese)
[9]黄志聪.A/O/N-Fenton-BAF组合工艺处理垃圾焚烧厂渗滤液的研究[D].广州:华南理工大学,2013.HUANG Z C.Study of the leachate treatment for waste incineration plant by A/O/N-Fenton-BAF process[D].Guangzhou:South China University of Technology,2013(in Chinese)
[10]国家环境保护局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002:258-285.
[11]ANTHONISEN A C,LOEHR R C,PRAKASAM T B S,et al.Inhibition of nitrification by ammonia and nitrous acid[J].Journal of Water Pollution Control Federation,1976,48:835-852.
[12]VADIVELU V M,KELLER J,YUAN Z G.Free ammonia and free nitrous acid inhibition on the anabolic and catabolic processes of Nitrosomonas and Nitrobacter[J].Water Science Technology,2007,56(7):153-160.