污水厂污泥产量计算和常规处理设计  

Sludge Yield Calculation and Conventional Sludge Treatment Process Design of SewageTreatmentPlant

作　　者：韩佩君 张明 吴艳华 钱勍 曹孟禹 郑佳慧 刘凯 HAN Pei-jun;ZHANG Ming;WU Yan-hua;QIAN Qing;CAO Meng-yu;ZHENG Jia-hui;LIU Kai(Central&Southern China Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430019,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430019

出　　处：《中国给水排水》2024年第4期71-77,共7页China Water & Wastewater

摘　　要：合理确定污水厂污泥产量是设计污泥处理系统的基础,从设计角度对预处理污泥、剩余污泥和化学污泥产量现有计算公式进行讨论,对重要参数如预处理污泥产量公式中系数α、出水SS,剩余污泥产量公式中污泥产率系数Y、污泥转换率f,化学污泥产量公式中药剂转化泥量系数K、进出水溶解性总磷的取值进行了分析。针对剩余污泥计算公式中污泥龄θc取值较宽泛的问题,提出了以磷平衡法进行校核。此外,还提出了当θc>20 d时,Y应以可生物降解COD(BCOD)为计算基础;同时建议《室外排水设计标准》在修订剩余污泥计算公式时,应考虑活性污泥内源呼吸过程中的惰性残余物。建议重力浓缩进泥含水率取99.2%,水力停留时间取12~16 h以免厌氧释磷;进泥管路上投加聚合氯化铝(PAC)或池底曝气以降低上清液TP浓度。常规污泥浓缩、调理及超高压板框压滤脱水工艺能将污泥含水率降至55%左右,进一步降低含水率需在脱水后增加干化环节。Reasonable calculation of sludge yield is the basis of sludge treatment system design.This paper discussed the existing calculation formulas for calculating the yields of pretreated sludge,excess sludge and chemical sludge from the design point of view,and analyzed the determination of important parameters such as coefficientαand effluent SS in the pretreated sludge yield formula,sludge yield coefficient Y and sludge conversion rate f in the excess sludge yield formula,coefficient K of sludge converted by agent and dissolved total phosphorus in influent and effluent in the chemical sludge yield formula.The phosphorus balance method was proposed to check the excess sludge calculation formula,so as to solve the problem of wide range of sludge age 9..It was also proposed that Y should be calculated based on biodegradable COD(BCOD)when§.was greater than 20 days.In addition,it was suggested that the inert residues in the endogenous respiration process of activated sludge should be considered in the revision of the excess sludge calculation formula specified in Standard for Design of Outdoor Wastewater Engineering.It was recommended that the moisture content and hydraulic retention time of gravity concentrated sludge should be 99.2%and 12-16 h to avoid anaerobic phosphorus release.Adding polymeric aluminum chloride(PAC)to the sludge inlet pipe or bottom aeration was employed to reduce the TP in supernatant.Conventional sludge concentration,conditioning and ultra-high plate and frame pressure filtration and dehydration process can reduce the moisture content of the sludge to approximately 55%,and further reducing the moisture content requires additional drying process after dehydration.

关 键 词：污泥产量 污泥产率系数 预处理污泥 剩余污泥 化学污泥 含水率 

分 类 号：TU992[建筑科学—市政工程]