低碳氮比污水对同步硝化反硝化脱氮的影响  

EFFECT OF LOW C/N ON NITROGEN REMOVAL VIA SIMULTANEOUS NITRIFICATION AND DENITRIFICATION

作　　者：肖静[1] 许国仁[1] 

机构地区：[1]哈尔滨工业大学,城市水资源国家重点实验室,黑龙江哈尔滨150090

出　　处：《水处理技术》2012年第11期77-80,共4页Technology of Water Treatment

基　　金：国家高技术研究发展计划(863)项目(2009AA064704);国家自然科学基金重点项目(51038003);新世纪优秀人才项目(NCET-08-161)

摘　　要：试验考察了低溶解氧含量连续曝气的序批式反应器内,低C/N污水对氮去除的影响,评价了氮的去除效率。结果表明,m(C)/m(N)为2.95和3.94的条件下,COD的去除并未受到影响,去除率高于95%。最高的TN和NH4+-N的去除率在m(C)/m(N)为2.95时达到,分别为47.4%和54.7%。当m(C)/m(N)降至1.98和1.05时,TN去除率下降为13.66%和16.26%。TN去除率低的原因是反硝化反应受到了C/N的影响,尤其是较低的C/N;并且,不平衡的硝化和反硝化反应导致了低的同步硝化反硝化效率。系统内,最高的同步硝化反硝化效率为94.72%,发生在m(C)/m(N)为3.94时,出水中的NOx--N量很少。The effect of sewage with low chemical oxygen demand and nitrogen（C/N） on nitrogen removal was investigated in a sequencing batch reactor system operated in continuous aeration mode at low dissolved oxygen concentration.The efficiency of nitrogen removal was evaluated.Results demonstrated that above 95.0% removal efficiencies of organic matter was achieved while the influentm（C）/m（N） were adjusted to 2.95 and 3.94.The removal efficiencies of TN and ammonia（NH4＋-N） removal with am（C）/m（N） of 2.95 were the max value at 47.4% and 54.7%.Decreasedm（C）/m（N） to 1.98 and 1.05,TN removal efficiencies were 13.66% and 16.26% respectively.By analyzing the data,denitrification was indeed influenced by C/N,especially lower influent C/N,causing low TN removal efficiency.Moreover,an unbalanced nitrification and denitrification resulted in low efficiency of simultaneous nitrification and denitrification（SND）.The highest simultaneous nitrification and denitrification efficiency were achieved atm（C）/m（N） of 3.94 leaving small amount NOx--N in the effluent.

关 键 词：低C N COD去除 脱氮 同步硝化反硝化 

分 类 号：X703.1[环境科学与工程—环境工程]