中国湖南某县城污水厂提标改造工程设计  

Design of the Upgrading and Renovation Project for a County Sewage Plant in Hunan Province,China

作　　者：余明达 李敏 Mingda Yu;Min Li(Hunan Xiangxin Water Environmental Protection Investment and Construction Co.,Ltd.,Changsha,Hunan,410082,China;Hunan Modern Environmental Technology Co.,Ltd.,Changsha,Hunan,410000,China)

机构地区：[1]湖南湘新水务环保投资建设有限公司,中国湖南长沙410082 [2]湖南现代环境科技股份有限公司,中国湖南长沙410000

出　　处：《工程设计与施工》2023年第10期34-36,共3页Engineering Design and Construction

摘　　要：湖南某县城污水处理厂设计规模为3.0万吨/日,原有工艺采用改良氧化沟+二沉池+转盘滤池+接触消毒,出水水质执行GB18918—2002《城镇污水处理厂污染物排放标准》一级B标准。按照当地环保要求,需要将出水水质提升至GB18918—2002《城镇污水处理厂污染物排放标准》一级A标准,基于工程现状,对改良型氧化沟曝气、推流、回流形式改造,提高水力停留时间,优化二沉池的不均匀沉降进行找平,改造滤布滤池,新增高效沉淀池和接触消毒池,总投资约3000万元,改造后电费降低约85万/年,药剂增加87.6万/年,提标后直接运营成本提高了2.6万/年。The design scale of a sewage treatment plant in a certain county in Hunan is 30000 t/d.The original process used improved oxidation ditch,secondary sedimentation tank,rotary disc filter tank,and contact disinfection.The effluent quality complies with the Class I B standard of GB18918-2002 Pollutant Discharge Standard for Urban Sewage Treatment Plants.According to local environmental protection requirements,it is necessary to improve the effluent quality to the first level A standard of GB18918-2002 Pollutant Discharge Standard for Urban Wastewater Treatment Plants.Based on the current situation of the project,the aeration,push flow,and reflux forms of the improved oxidation ditch are modified to increase the hydraulic retention time,optimize the uneven settlement of the secondary sedimentation tank,and level it.The filter cloth filter tank is renovated,and a high-efficiency sedimentation tank and contact disinfection tank are added,with a total investment of about 30 million yuan,After the renovation,the electricity cost decreased by about 850000 yuan per year,and the pharmaceutical cost increased by 876000 yuan per year.After the standard was raised,the direct operating cost increased by 26000 yuan per year.

关 键 词：污水处理厂 提标改造 改良氧化沟 曝气 回流 

分 类 号：X70[环境科学与工程—环境工程]