曝气沉砂池H2S排放浓度的时间变化与影响因子  

Temporal Variation Characteristics and Influencing Factors of H2S Emission Concentration in Aerated Grit Chamber

作　　者：韩彩云 张晶宇 丁永伟 陈鹏 朱强 席劲瑛 HAN Cai-yun;ZHANG Jing-yu;DING Yong-wei;CHEN Peng;ZHU Qiang;XI Jin-ying(State Key Laboratory of Environmental Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China;Research Institute for Environmental InnovationTsinghua,Suzhou 215163,China;Suzhou Water Group Company Limited,Suzhou 215131,China;Suzhou Drainage Company Limited,Suzhou 215006,China)

机构地区：[1]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 [2]清华苏州环境创新研究院,江苏苏州215163 [3]苏州水务集团有限公司,江苏苏州215131 [4]苏州市排水有限公司,江苏苏州215006

出　　处：《中国给水排水》2020年第7期74-77,83,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07301-003)。

摘　　要：为了解污水构筑物中H2S排放浓度的时间变化特征与影响因子,选取恶臭污染较重的8月—10月,分别于2014年和2015年对苏州某污水处理厂曝气沉砂池内H2S浓度进行了实时在线监测(采样间隔为30 s)。结果表明,污水厂的H2S排放浓度波动较大,具有明显的变化特征,一天中11:00—14:00、17:00—19:00、22:00—02:00是H2S排放的3个高峰期,05:00—09:00、15:00—16:00是H2S排放的低谷期。进一步考察了污水流量、污水中硫化物浓度、pH值和水温的变化对H2S排放浓度的影响,发现H2S排放浓度与污水流量(1180~2360 m^3/h)、污水中硫化物浓度(0.36~0.71 mg/L)和水温(26.8~27.1℃)呈显著正相关性,其中污水中硫化物浓度和水温与H2S排放浓度的Pearson相关系数分别为0.84和0.62。在一天的变化范围内,pH值波动范围(7.07~7.23)小,与H2S排放浓度未表现出显著的相关性。In order to understand temporal variation characteristics and influencing factors of H2 S emission concentration in wastewater treatment structures,real-time online monitoring of H2 S concentration in an aerated grit chamber of a wastewater treatment plant(WWTP)in Suzhou was carried out from August to October with heavy odor pollution in 2014 and 2015 respectively(the sampling interval was 30 s).The H2 S emission concentration of WWTP fluctuated greatly and had obvious variation characteristics,which was the highest at 11:00-14:00,17:00-19:00 and 22:00-02:00 and the lowest at 05:00-09:00 and 15:00-16:00 in a day.The effects of wastewater flow rate,sulfide concentration,pH value and water temperature on H2 S emission concentration were further investigated.The emission concentration of H2 S had significant positive correlations with wastewater flow rate(1180-2360 m^3/h),sulfide concentration(0.36-0.71 mg/L)and water temperature(26.8-27.1℃).The Pearson correlation coefficients of sulfide concentration and water temperature with H2 S concentration were 0.84 and 0.62,respectively.Within a day,pH value fluctuated within a small range(7.07-7.23),showing no significant correlation with H2 S concentration.

关 键 词：曝气沉砂池 H2S 时间变化特征 影响因子 

分 类 号：TU992[建筑科学—市政工程]