长流程四级处理工艺用于准Ⅳ类排放标准大型污水厂  

Application of Four-stage Treatment Long Process in a Large-scale Municipal Wastewater Treatment Plant to Meet Quasi Class Ⅳ Discharge Standard

作　　者：杨祝平 YANG Zhu-ping(Tianjin Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300392,China;Tianjin Enterprise Key Laboralory of Infrastrucure Durability,Tianjin 300392,China)

机构地区：[1]天津市政工程设计研究总院有限公司,天津300392 [2]天津市基础设施耐久性企业重点实验室,天津300392

出　　处：《中国给水排水》2022年第24期58-58,59-63,共6页China Water & Wastewater

摘　　要：对规模为45×10^(4)m^(3)/d的某污水厂进行异地新建,出水标准由一级B提高至准Ⅳ类标准。新厂选用污泥浓度高、出水水质优、运行稳定的“速沉池+多级AO+矩形周进周出二沉池+DN生物滤池+高效澄清池+V型滤池+臭氧催化氧化+紫外消毒”处理工艺。工程设计总规模为60×10^(4)m^(3)/d(其中一期为45×10^(4)m^(3)/d),占地面积33 hm^(2),一期工程费16.79亿元。实际运行结果表明,各出水指标可稳定达到天津市地标A标准(准Ⅳ类标准)。该工艺可有效应对北方地区污水的高排放标准处理,该污水厂实际吨水电耗0.27 kW·h/m^(3),运行成本约1.31元/m^(3),属低能耗环境友好型污水厂。A wastewater treatment plant with a scale of 45×10^(4) m^(3)/d was rebuilt in a different place,and the discharge standard was raised from first level B limit to quasi class Ⅳ limit.The treatment process of the new plant was characterized by high sludge concentration,high effluent quality and reliability,which consisted of rapid sedimentation tank,multi-stage AO,rectangular peripheral-feed peripheral-overflow secondary clarifier,DN biofilter,high-efficiency clarifier,V-type filter,ozone catalytic oxidation and UV disinfection.The total design scale of the project was 60×10^(4) m^(3)/d (phaseⅠproject was 45×10^(4) m^(3)/d),the footprint area was 33 hm^(2),and the investment of phaseⅠproject was 1.679billion yuan.The actual operational results showed that each index in effluent stably met the A limit specified in the Tianjin local discharge standard (quasi class Ⅳ standard).The process was effective in treating wastewater to meet a high discharge standard in northern China.The actual unit power consumption was 0.27 kW·h/m^(3),and the operating cost was approximately 1.31 yuan/m^(3),indicating that the wastewater treatment plant was energy consumption and environmentally friendly.

关 键 词：准Ⅳ类标准 大型污水处理厂 多级AO工艺 矩形周进周出沉淀池 DN生物滤池 V型滤池 臭氧催化氧化 

分 类 号：TU992.3[建筑科学—市政工程]