摘要
结合某氧化沟工艺污水厂对主要污染物的去除效果,对其活性污泥特性进行了分析。结果表明:系统中活性污泥在厌氧搅拌前0.5 h的平均比厌氧释磷速率为1.10 mg PO_4^(3-)-P/(g MLVSS·h),厌氧释磷效果较差;平均比好氧吸磷速率为6.30 mg PO_4^(3-)-P/(g MLVSS·h),比缺氧吸磷速率为2.83 mg PO_4^(3-)-P/(g MLVSS·h),反硝化聚磷菌占总聚磷菌的比例为44.9%;比硝化速率为7.55 mg NH_4^+-N/(g MLVSS·h),硝化效果良好;比反硝化速率存在明显的3个变化阶段,其中第1阶段比反硝化速率最大,为5.79 mg NO_3^--N/(g MLVSS·h),第2阶段比反硝化速率次之,为2.23 mg NO_3^--N/(g MLVSS·h),第3阶段的最小,为0.82 mg NO_3^--N/(g MLVSS·h),活性污泥的比反硝化速率总体较低。为此,建议将原连续非限制曝气运行方式改为间歇曝气方式,并在缺氧区投加适量碳源,以提高系统的脱氮除磷效果。
Based on the major pollutants removal performances in a wastewater treatment plant （WWTP） with oxidation ditch process, a characteristic analysis on the activated sludge was performed. Results showed a poor performance in phosphorus release, with a specific phosphorus release rate in the first 0.5 hour （ SPRR0.5 ） of 1.10 mgPO3/4- - P/（ gMLVSS · h） ; the average specific phosphorus uptake rates under aerobic （ASPUR） and anoxic （NSPUR） conditions were 6.30 mgPO3/4- - P/（ gMLVSS · h） and 2.83 mgPO3/4- - P/（ gMLVSS · h）, respectively ; the proportion of the denitrifying phosphorus accu- mulating bacteria （DNPAO） to the phosphorus accumulating bacteria （PAO） was 44.9% ; the specific nitrification rate （SNR） was 7.55 mgNH4＋ - N/（ gMLVSS · h）, indicating a good nitrification perform- ance ; the specific denitrification rate （SDR） could be divided into three stages, i.e. 5.79 mgNO-3 - N/ （gMLVSS · h）, 2.23 mgNO-3 -N/（gMLVSS · h）, and 0.82 mgNO-3 -N/（gMLVSS · h）, generally showing a low denitrification rate. It was suggested that the original continuous non-limiting aeration oper-ation should be changed to an intermittent aeration operation, and an appropriate amount of carbon source should be added into the anoxic zone to improve the removal of nitrogen and phosphorus.
作者
吴代顺
方燕蓝
WU Dai-shun;FANG Yan-lan(School of Oceanographic and Biochemical Engineering, Fuqing Branch, Fujian Normal University, Fuqing 350300, Chin)
出处
《中国给水排水》
CAS
CSCD
北大核心
2018年第11期109-113,共5页
China Water & Wastewater
基金
福建省科技计划项目(2016H0014)
工业引导性(重点)项目
关键词
氧化沟
活性污泥
比厌氧释磷速率
比好氧/缺氧吸磷速率
比硝化速率
比反硝化速率
oxidation ditch
activated sludge
specific phosphorus release rate
specific aer-obic/anoxic phosphorus uptake rate
specific nitrification rate
specific denitrification rate
