甲醇为碳源短程反硝化亚硝酸盐积累特性  

Nitrite accumulation properties of partial denitrificationwith methanolas carbon source

作　　者：牛萌[1] 王淑莹[1] 杜睿[1] 操沈彬 彭永臻[1] NIU Meng;WANG Shu-ying;DU Rui;CAO Shen-bin;PENG Yong-zhen(National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology,Beijing 100124, China)

机构地区：[1]北京工业大学国家工程实验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124

出　　处：《中国环境科学》2017年第9期3301-3308,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(51478013);北京市教委资助项目

摘　　要：接种反硝化过程中亚硝态氮(NO_2^--N)积累效果稳定的短程反硝化污泥,以甲醇为碳源,通过批次试验研究了不同碳氮比(C/N)、硝态氮(NO_3^--N)浓度及p H条件下短程反硝化过程中NO_2^--N积累特性.实验结果表明:当C/N为2.5时,NO_2^--N积累率最高为89%,且NO_2^--N不会被还原;当C/N为3~5时,NO_2^--N积累到最大值后开始降低,但NO_2^--N最大积累量和比反硝化速率没有明显差异.当NO_3^--N浓度在14.91~82.58mg/L范围内,NO_3^--N浓度越高,达到NO_2^--N最大积累率理论所需C/N越低.且当NO_3^--N浓度小于58.71mg/L时,比NO_3^--N还原速率、比NO_2^--N积累速率随NO_3^--N浓度增加而上升.当p H=7时,NO_2^--N积累量、比NO_3^--N还原速率和比NO_2^--N积累速率最高,分别为24.49mg/L、18.96(mg/(g VSS·h))、18.91(mg/(g VSS·h)),然后依次是p H=6、8、9.p H=5和10时,短程反硝化基本不能进行.本研究可以为短程反硝化的实现及应用提供理论依据.Taking partial denitrification sludge as seeding sludge,which could reduce nitrate(NO-3-N)to nitrite(NO-2-N)with stable NO-2-N accumulation.NO-2-N accumulation properties of partial denitrification with different carbon nitrogenratio(C/N),NO-3-N and pH were studied by batch experiments with methanol as carbon source.The results showed thatC/N had no significant effect on the maximum accumulation of NO-2-Nor specific denitrification rate when C/N was2.5~5.When C/N was2.5,NO-2-N accumulation rate was89%and NO-2-N was not reduced.But when C/N>3,NO-2-Nwould be reduced after NO-2-N accumulated to the maximum value.In the case of C/N was2.5and NO-3-Nwas14.96~58.71mg/L,specific denitrification rate increased with the increase of NO-3-N.Continue to improve NO-3-N,thechange of specific denitrification rate was very small.On the other hand,when NO-3-N>29.01mg/L,the higher NO-3-Nwas,the lower C/N required.PH had a significant effect on the maximum accumulation of NO-2-N and the specificdenitrification rate in the partial denitrification process.When pH=7,NO-2-Naccumulated rate、specific NO-3-N reductionrateand specific NO-2-N accumulation rate was24.49mg/L、18.96(mg/(gVSS?h))、18.91(mg/(gVSS?h)).And thenfollowed byp H=6、8、9.When pH=5and10,the partial denitrification process could not be carried out.This study couldprovide a theoretical basis for the realization and application of partial denitrification.

关 键 词：短程反硝化 亚硝积累 甲醇 C/N PH值 

分 类 号：X703.1[环境科学与工程—环境工程]