全过程除臭工艺在北京某再生水厂的应用及其中气液两相污染物的削减过程  

Application of the whole process deodorization process in a reclaimed water plant in Beijing and the reduction of gas-liquid two-phase pollutants

作　　者：王婧瑶 方皓 吴银彪 孙建伶 葛晓颖 王启镔 杨永强 WANG Jingyao;FANG Hao;WU Yinbiao;SUN Jianling;GE Xiaoying;WANG Qibin;YANG Yongqiang(Beijing Municipal Research Institute of Eco-environment Protection,Beijing 100037,China;National Engineering Research Center for Urban Environmental Pollution Control,Beijing 100037,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京市生态环境保护科学研究院,北京100037 [2]国家城市环境污染控制工程技术研究中心,北京100037 [3]清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《环境工程学报》2023年第9期2820-2826,共7页Chinese Journal of Environmental Engineering

摘　　要：全过程除臭是一种以微生物法为核心的低碳除臭方式。为评估其应用效果,分析了北京市某再生水厂的产排污关键环节中的气液两相污染物削减情况。结果表明:初始污水中[NH_(4)^(+)-N]高于H_(2)S的质量浓度,分别为55 mg·L^(−1)和6 mg·L^(−1),二者随污水反应进程呈逐渐降低的趋势,分别在生化段和粗格栅处去除效果最好;气相污染物主要为NH_(3)和H_(2)S,其中NH_(3)在粗格栅处排放通量较高,质量浓度为0.4 mg·m^(−3),化学浓度贡献率为71%~91%,H_(2)S在污泥储池处质量浓度较高,为0.16 mg·m^(−3);对粗格栅处进行模拟换气实验,H_(2)S、NH_(3)和臭气的浓度分别为0.027~0.036 mg·m^(−3)、0.023~0.031 mg·m^(−3)和10~15;厂界的NH_(3)和H_(2)S质量浓度在上风向的检测值均低于下风向,最高值为0.100和0.007 mg·m^(−3),臭气(无量纲),甲烷体积分数为1.7×10^(−6),粗格栅模拟换气和厂界排放浓度均达到北京市《大气污染物综合排放标准》(DB11/501-2017)和《城镇污水处理厂污染物排放标准》(GB18918-2002)。该研究结果对北京某再生水厂进行气液两相污染物削减分析,证明了全过程除臭工艺应用的有效性,可为同类水厂的除臭问题提供参考。Aiming at the demand for reducing pollution and carbon in the deodorization process of a reclaimed water plant,the whole process deodorization process was adopted,which was a relatively low carbon deodorization method based on microbial method.In order to evaluate its application effect,the reduction of liquid and gas phase pollutants in the key point of production and sewage of a reclaimed water plant in Beijing was analyzed in this study.The results showed that the concentration of NH_(4)^(+)-N in the initial sewage was higher than H_(2)S,which was 55 mg·L^(−1)and 6 mg·L^(−1),respectively.The concentration of NH_(4)^(+)-N and H_(2)S decreased gradually with the process of sewage reaction,and the removal effect was the best at the biochemical section and coarse grid.The main gaseous pollutants were NH_(3)and H_(2)S,among which NH_(3)had the highest emission flux of 0.4 mg·m^(−3)at the coarse grid and the contribution rate of chemical concentration was 71%~91%,while H_(2)S had the highest concentration of 0.16 mg·m^(−3)at the sludge storage tank.The simulated air exchange experiments were carried out at the coarse grille,and the concentrations of H_(2)S,NH_(3)and odor were 0.027~0.036 mg·m^(−3),0.023~0.031 mg·m^(−3)and 10~15,respectively.The concentration of NH_(3)and H_(2)S in the factory boundary in the upwind direction was lower than that in the downwind direction,the highest values were 0.100 and 0.007 mg·m^(−3),odor(dimensionless),methane concentration was 1.7×10^(−6).The simulated ventilation of coarse grille and the emission concentration of plant boundary reached the comprehensive emission Standard of Air Pollutants of Beijing(DB11/501-2017)and Pollutant Emission Standard of Urban Sewage Treatment Plant(GB18918-2002).In this study,the gas-liquid two-phase pollutant reduction analysis of a Beijing recycled water plant proved the effectiveness of the whole process deodorization process,and provided a technical reference for the deodorization problem of similar water plants.

关 键 词：全过程除臭 氨氮 硫化氢 污水 厂界 

分 类 号：X703[环境科学与工程—环境工程]