摘要
合流制溢流(CSO)污水具有水质水量波动大、非连续产生的特点,采用臭氧气浮技术对CSO污水进行处理,研究该技术对化学需氧量(COD)、总磷(TP)、悬浮固体(SS)等污染指标的控制效果。实验室小试结果表明,在最适工艺条件下,混凝-臭氧同步处理对CSO实际污水SS、TP、COD去除率分别为77.8%、73.6%和57.9%,显著削弱了腐殖质类有机物荧光强度,混凝与臭氧氧化之间表现出良好的协同作用,能够实现CSO污染的有效控制。进一步设计了臭氧气浮撬装式设备,并在武汉市开展了CSO处理现场实验研究,运行结果表明,臭氧气浮工艺系统对SS、TP、COD的平均去除率分别为81.8%、75.4%和61.7%,净化效果良好,实现了对CSO典型污染物的协同治理。通过实验室研究和工程实验结果,证实了臭氧气浮工艺用于CSO污水治理的工程可行性,上述研究结果可为CSO污水的多水质目标协同控制提供理论指导和技术参考。
Combined sewer overflow(CSO)sewage has the characteristics of large fluctuations of water quality and quantity along with discontinuous generation.Ozone air flotation technology was used to treat CSO wastewater,and its effect on the control of chemical oxygen demand(COD),total phosphorus(TP),suspended solids(SS)and other pollution indicators is studied.Laboratory tests reveal that under the optimal process conditions,the coagulation-ozone simultaneous treatment could remove 77.8%of SS,73.6%of TP,and 57.9%of COD in actual CSO sewage,respectively,as well as significantly decreased the fluorescence intensity of humus organic matter.A strong synergy effect occurred between coagulation and ozonation in this process and could achieve an effective control of CSO pollution.Furthermore,the skid-mounted ozone flotation equipment was designed,and a field test was conducted for CSO treatment in Wuhan City.The operation results demonstrate that the ozone air flotation process system showed the average removal rates of 81.8%,75.4%and61.7%for SS,TP,and COD,respectively,indicating effective purification effects.Through laboratory research and engineering trials,the engineering feasibility of ozone air flotation process for CSO sewage treatment was proved.This study provides both theoretical guidance and technical support for the collaborative control of CSO sewage with diverse water quality targets.
作者
姜永祯
汤丁丁
周艳
夏云峰
何东恺
张诗雄
郑碧娟
李进
毛旭辉
JIANG Yongzhen;TANG Dingding;ZHOU Yan;XIA Yunfeng;HE Dongkai;ZHANG Shixiong;ZHENG Bijuan;LI Jin;MAO Xuhui(School of Resources and Environmental Sciences,Wuhan University,Wuhan 430079,China;China Construction Third Bureau Green Industry Investment Co.Ltd.,Wuhan 430064,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第11期3534-3542,共9页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金面上项目(52170169)
中国建筑股份有限公司资助项目(CSCEC-2021-Z-2)。
关键词
合流制溢流
臭氧气浮
混凝
工程实验
Combined Sewer Overflow(CSO)
dissolved ozone flotation
coagulation
engineering test
