摘要
针对传统活性污泥法脱氮除磷效率低、污泥产量高的缺点，提出了水解酸化／缺氧-厌氧-好氧（HAAO）污水、污泥一体化处理工艺，研究了该工艺去除COD、氮、磷和污泥减量的效果及其主要影响因素。试验结果表明，在进水COD为286-425mg／L、NH4^＋ -N为36-58mg／L、PO4^3- -P为4-12mg／L、总水力停留时间为11．5h及无外加碳源和碱度的条件下，系统对COD、NH4^＋ -N、TN、PO4^3- -P的去除率分别可达95％、98％、84％、87％。好氧段的DO浓度、固体停留时间（SRT）和剩余污泥回流比对系统的运行效果有重要影响。将污水和剩余污泥同时进行水解酸化，既可有效地改善污水的可生化性，提高系统对碳源的利用效率，又可实现污泥的减量化，试验条件下系统的污泥减量率达56．5％。
Aimed at the disadvantages of low nitrogen and phosphorus removal efficiency and high sludge production in conventional activated sludge processes, the integrated treatment process ol wastewater and excess sludge by hydrolysis acidification/anoxic -anaerobic -aerobic （AAO） process was put forward. The efficiencies of COD, nitrogen and phosphorus removal and sludge reduction by this process and the main influencing factors were investigated. The results show that when the influent COD, NH4^＋ - N and PO4^3- - P are 286 to 425 mg/L, 36 to 58 mg/L and 4 to 12 mg/L, as well as the hydraulic retention time is 11.5 h and no external carbon source or alkalinity is added, the removal rates of COD, NH4^＋ - N, TN and PO4^3- - P are 95% , 98% , 84% and 87% respectively. The DO concentration, SRT in aerobic stage and reflux ratio of excess sludge significantly affect the operation results. The simultane- ous hydrolysis of wastewater and excess activated sludge can improve the biodegradability of raw wastewater, the utilization rate of carbon source, and reduction of excess activated sludge. The reduction rate reaches 56.5% in the experiment.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第23期1-5,共5页
China Water & Wastewater
基金
北京市属市管高等学校人才强教"创新团队"项目(05005013200504)
高等学校博士学科点专项科研基金资助项目(200600050002)
北京市自然科学基金资助项目(8042004)
关键词
脱氮
除磷
污泥减量
水解酸化
AAO工艺
nitrogen removal
phosphorus removal
reduction of excess activated sludge
hydrolysis acidification
anoxic/anaerobic/aerobic process
