摘要
污水处理厂运行中会产生大量恶臭气体,其不同构筑物中排放气体的组成和浓度不尽相同。采用不同工艺(生物法、水洗-生物法、酸洗-生物法和生物-碱洗法)对北京市某污水处理厂产生的恶臭气体进行了处理,并在1 a内开展了共计12次现场监测,以评估除臭设施对氨(NH_(3))和挥发性硫化物(VSCs,包括硫化氢(H_(2)S)、甲硫醇(MT)、甲硫醚(DMS)、二甲二硫醚(DMDS)、二硫化碳(CS_(2))和羰基硫(COS))的处理效果。结果表明:污水预处理段、A^(2)/O生物池、二沉池和污泥脱水机房的主要恶臭物质为NH_(3)和H_(2)S;NH_(3)平均质量浓度依次为0.250、0.442、0.151和0.469 mg·m^(-3),H_(2)S平均质量浓度依次为0.171、0.071、0.033和0.041 mg·m^(-3);污泥接收间和污泥热水解系统的主要恶臭物质为NH_(3)、H_(2)S、DMS和DMDS;污泥接收间各类恶臭物质的平均质量浓度依次为0.494、0.134、0.034和0.047 mg·m^(-3),污泥热水解系统中的各类恶臭物质的平均质量浓度依次为4.649、0.188、0.086和0.056 mg·m^(-3);污泥上清液厌氧氨氧化池的主要恶臭物质为NH_(3),平均质量浓度为2.315 mg·m^(-3)。污水预处理段、A^(2)/O生物池和污泥脱水机房采用水洗+生物法工艺,其对NH_(3)和H_(2)S的去除率最高可达94%和92%;二沉池除臭工艺为生物法,其对NH_(3)和H_(2)S的去除率为78%和67%;污泥接收间和污泥热水解系统采用生物+碱洗法,其对H_(2)S、MT、DMS、DMDS和CS_(2)的去除率最高分别为96%、89%、80%、84%和81%;污泥上清液厌氧氨氧化池除臭工艺为酸洗+生物法,其对NH_(3)的去除率高达95%。该污水处理厂各工艺段产生的恶臭气体经处理后可同时满足《恶臭污染物排放标准》(GB 14554征求意见稿)和《北京市大气污染物综合排放标准》(DB11/501-2017)。本研究可为采用类似工艺的污水处理厂解决恶臭气体问题提供参考。
During the operation of wastewater treatment plant(WWTP),a large amount of odor gas will be produced.The odor gas produced by a WWTP in Beijing is treated by different treatment processes(biological method,water washing-biological method,acid pickling-biological method and biological-alkali washing method),and a total of 12 on-site monitoring was carried out within 1 year to evaluate the effect of deodorization facilities on ammonia(NH_(3))and volatile sulfide compounds(VSCs,including hydrogen sulfide(H_(2)S),methyl mercaptan(MT),methyl sulfide(DMS),dimethyl disulfide(DMDS),carbon disulfide(CS_(2))and carbonyl sulfur(COS)).The results show that the main odorous substances in wastewater pretreatment section,A^(2)/O biological tank,secondary sedimentation tank and sludge dewatering room are NH_(3)and H_(2)S;The average mass concentration of NH_(3)is 0.250,0.442,0.151 and 0.469 mg·m^(-3);and the average mass concentration of H_(2)S is 0.171,0.071,0.033 and 0.041 mg·m^(-3).The main odorous substances in sludge receiving room and sludge thermal hydrolysis system are NH_(3),H_(2)S,DMS and DMDS;The average mass concentration of odor gas in sludge receiving room is 0.494,0.134,0.034 and 0.047 mg·m^(-3),and the average mass concentration of odor gas in sludge thermal hydrolysis system is 4.649,0.188,0.086 and 0.056 mg·m^(-3).The main odorous substance in the anammox tank is NH_(3),with an average mass concentration of 2.315 mg·m^(-3).The deodorization process of wastewater pretreatment section,A^(2)/O biological tank and sludge dewatering room is water washing-biological method,and the maximum removal efficiencies of NH_(3)and H_(2)S are 94%and 92%respectively.The deodorization process of secondary sedimentation tank is biological method,and the removal efficiencies of NH_(3)and H_(2)S are 78%and 67%respectively.The deodorization process of sludge receiving room and sludge thermal hydrolysis system is biological-alkali washing method,and the maximum removal efficiencies of H_(2)S,MT,DMS,DMDS and CS_(2)are 96%,89%,80%
作者
崔环宇
李若愚
齐飞
常江
赵珊
沈秀娥
孙德智
CUI Huanyu;LI Ruoyu;QI Fei;CHANG Jiang;ZHAO Shan;SHEN Xiue;SUN Dezhi(Beiing Key Lab for Source Control Technology of Water Pollution,Bejing Forestry University,Bejing 100083,China;Pollution Water Source Control and Ecological Restoration Technology Beijing University Engineering Research Center,Beiing 100083,China;College of Environmental Science and Engineering,Bejing Forestry University,Bejjing 100083,China;Science and Technology R&D Center of Beijing Drainage Group Co.,LTD,Beijing 100044,China;Beijing Municipal Ecological and Environmental Monitoring Center,Beijing 100048,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2022年第4期1102-1110,共9页
Chinese Journal of Environmental Engineering
基金
北京市科技计划项目(Z181100005518008)。
关键词
恶臭气体
污水处理厂
A^(2)/O工艺
生物滴滤
除臭设施
性能评估
odor gas
wastewater treatment plant
A^(2)/O process
bio-trickling filter
deodorization facilities
performance evaluation
