生活污水脱氮除磷工程设计[ 摘 要 ] 某 小 区 每 天 生 活 污 水 的 最 大 排 放 量 为28000t ， 污 水 水 质 为 ：BOD=130mg/L，COD=280mg/L，SS=280mg/L，TP=4.5mg/L，TN=30mg/L；根据进水水质特征与出水水质要求，拟采纳 CAST 作为该小区生活污水脱氮除磷的工艺，其处理流程为：进水→中格栅→提升泵房→细格栅→平流沉砂池→CAST 反应池→接触池→出水，污水经处理后达到 GB18918-2024 一级 A 标准，且整个处理自动化程度高，噪音小；经预算整个工程初期投资较低，运行成本 0.41 元/(m3污水)，适用于城市小区生活污水的处理，其设计过程可为类似污水处理厂设计提供借鉴和参考。[关键词]小区生活污水；CAST；脱氮除磷Engineering design of denitrification and phosphorus removal of sewageAbstract: A district sewage of maximum emissions is 28000 t every day,the designed water quality for BOD,COD,SS,TP and TN is 130mg/L,280mg/L,280mg/L,4.5mg/L,30mg/L respectively. According to the characters of influent water quality and effluent water quality requirements,the proposed CAST can be taken as a technology of plot sewage denitrification and phosphorus. The process is as follows:wastewater→medium grille→boost pump room→Fine screen→horizontal flow grit chamber→CAST reaction pool→contact chamber→water purification. The sewage after treatment reach GB18918-2024 grade Astandard and the whole deal with a high degree of automation, low noise. After the initial investment of theproject ,budget is low, operation cost is 0.41 yuan/ (m3) wastewater, it is suitable for urban residential sewage treatment, The design process can provide a reference for the similar wastewater treatment plant design.Key words:Community wastewater;Cyclic Activated Sludge System; Nitrogen and phosphorus removal目 录引言 11 设计任务与资料 11.1 设计原始资料 11.1.1 设计任务 11.1.2 水质情况 11.2 设计要求 11.2.1 污水处理厂设计原则 11.2.2 污水处理工程运行过程中应遵循...
