生物活性炭对SBR生物脱氮过程中N_(2)O产生的影响  

Effects of BAC on N_(2)O Production during Biological Nitrogen Removal Process in SBR under Different C/N Ratios

作　　者：吴青 贾炎[1,2,3] 崔延瑞 鲍林林 马凯丽[1,2,3] 康威 张恒涛[4] 邹旭艳 WU Qing;JIA Yan;CUI Yan-rui;BAO Lin-lin;MA Kai-li;KANG Wei;ZHANG Heng-tao;ZOU Xu-yan(Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control,School of Environment,Henan Normal University,Xinxiang 453007,China;Henan Key Laboratory of Environmental Pollution Control,Henan Normal University,Xinxiang 453007,China;Henan Province International Joint Laboratory on Key Techniques in Water Treatment,Henan Normal University,Xinxiang 453007,China;China Petroleum Pipeline Engineering Corporation,Langfang 065000,China)

机构地区：[1]河南师范大学环境学院黄淮水环境与污染防治教育部重点实验室,河南新乡453007 [2]河南师范大学河南省环境污染控制重点实验室,河南新乡453007 [3]河南师范大学河南省水处理关键技术国际联合实验室,河南新乡453007 [4]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《中国给水排水》2021年第9期33-39,45,共8页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51908199);河南省自然科学基金资助项目(182300410154);河南师范大学国家级项目培育基金资助项目(2017PL14);中国博士后科学基金资助项目(2019M652547)。

摘　　要：为考察生物活性炭(BAC)对不同C/N值废水脱氮过程中N_(2)O产生的影响,在序批式活性污泥反应器(SBR)中加入活性炭形成SBR_(BAC),并与活性污泥SBR(SBR_(AS))进行了比较。以甲醇为碳源配制人工废水,控制进水C/N值分别为3、6和9,在室温(15~27℃)条件下同步运行两个反应器,并测定N_(2)O、NH_(4)^(+)-N、NO_(3)^(-)-N、NO_(2)^(-)-N和TN浓度变化,分析BAC影响N_(2)O产生的机制。在控制混合液DO为2.0~3.0 mg/L条件下,C/N值为3时BAC对N_(2)O的产生没有影响,C/N值为6时BAC可以减少N_(2)O产生,C/N值为9时BAC导致N_(2)O浓度增加;BAC的存在促进了同步硝化反硝化(SND)的进行,进而影响N_(2)O的产生;C/N值是影响脱氮效果和N_(2)O产生的重要因素,COD下降拐点处复杂的反应环境为SND提供了必要条件,BAC能够强化该拐点处的反应条件。In order to investigate the effects of biological activated carbon(BAC)on N_(2)O production in biological nitrogen removal process for different C/N ratio wastewater,activated carbon was added to sequencing batch reactor(SBR)to form BAC-SBR(SBR_(BAC)),and compared with activated sludge SBR(SBR_(AS)).At room temperature of 15-27℃,methanol was used as the carbon source to prepare artificial wastewater,the influent C/N ratio was adjusted to be 3,6 and 9 respectively,and the two reactors were operated simultaneously.The concentrations of N_(2)O,NH_(4)^(+)-N,NO_(3)^(-)-N,NO_(2)^(-)-N and TN were measured.And also the mechanism of BAC affecting N_(2)O production was analyzed.The experimental results showed that when DO in mixed liquid was controlled at 2.0-3.0 mg/L,and C/N ratio was 3,BAC had no effect on N_(2)O production;when the C/N ratio was 6,BAC could reduce N_(2)O production;and when the C/N ratio was 9,BAC led to an increase in N_(2)O concentration.The presence of BAC promoted simultaneous nitrification and denitrification(SND),which affected the production of N_(2)O;C/N ratio of wastewater was an important factor that affected the effect of denitrification and N_(2)O.The complex reaction environment at the inflection point of COD decline provided the necessary conditions for SND,and BAC could strengthen the reaction conditions at this inflection point.

关 键 词：生物活性炭 序批式活性污泥反应器 同步硝化反硝化 N2O C/N值 

分 类 号：TU992[建筑科学—市政工程]