盐度负荷冲击对厌氧-好氧组合工艺处理晚期垃圾渗滤液短程脱氮的影响  

Effect of salinity shocks on nitrogen removal via nitrite of old landfill leachate using combination of anaerobic-aerobic process

作　　者：刘牡[1] 刘甜甜[1] 彭永臻[1] 王淑莹[1] 肖寒[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《东南大学学报（自然科学版）》2014年第3期610-615,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA063406);北京市科技计划资助项目(D121100000112001)

摘　　要：采用基于短程硝化的UASB-A/O 组合工艺处理含盐晚期垃圾渗滤液，在不同盐度水平（10～35 g/L）研究了盐度负荷冲击对系统处理性能的综合影响．结果表明，组合系统在盐度为10～20 g/L范围内具有一定的抗盐度冲击能力，当盐度升高到35 g/L时，氨氮和总氮去除率分别下降至83．9％和68．4％，而有机物的去除率依然能够维持在90．1％．好氧污泥MLSS从4129 mg/L下降至3836 mg/L，SVI变化范围为91～119 mL/g，而同步反硝化产甲烷UASB 中的厌氧污泥具有较强的抗盐度冲击能力．与DO相比，A/O采用p H值作为模糊控制参数具有更高的抗盐度负荷冲击能力．在盐度与游离氨的双重选择性抑制作用下，A/O 出水亚硝酸积累率从94．3％提升到97．2％．Saline old landfill leachate was treated via nitrite using an up-flow anaerobic sludge blan-ket （UASB）combining with an anoxic/aerobic （A/O）reactor.The influence of salinity shocks from 10 to 35 g/L on the performance of the system and the characteristics of the activated sludge were studied.Results indicate that the combined system exhibits certain resistance to the salinity shocks when salinity ranges from 10 to 20 g/L.With the further increase of salinity load to 35g/L, the ammonia and total nitrogen removal rates reduce to 83.9%and 68.4%,respectively,while the removal rate of organic matter still remains at 90.1%.MLSS （mixed liquid suspended solids）of aerobic sludge decrease from 4 129 to 3 836 mg/L and the SVI（sludge volume index）of aerobic sludge varies from 91 to 119 mL/g,while anaerobic sludge in UASB presents strong salinity shock resistance.Compared to dissolved oxygen,taking pH value as the fuzzy-control parameter in A/O reactor treating landfill leachate containing saline is a better choice.The nitrite accumulation rate of the effluent exhibits small range of ascension under the dual inhibitions of salinity and free ammonia.

关 键 词：晚期垃圾渗滤液 短程脱氮 盐度负荷冲击 

分 类 号：X703.1[环境科学与工程—环境工程]