温度对SBR强化生物除磷工艺除磷性能的影响  

Effects of temperature on performance of enhanced biological phosphorous removal in activated sludge

作　　者：彭党聪[1] 张晓霞[1] 樊香妮 侯艳红[1] PENG Dangcong ZHANG Xiaoxia FAN Xiangni HOU Yanhong(School of Environmental and Municipal Engineering,Xi＇ an University of Architecture and Technology,Xi＇ an 710055 ,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境工程学报》2016年第11期6106-6110,共5页Chinese Journal of Environmental Engineering

基　　金：陕西省科技统筹创新重大项目(2011KTZB-03-03-03)

摘　　要：以厌氧/好氧交替运行的序批式反应器(SBR)为对象,利用荧光原位杂交技术(FISH),研究了温度(20、25和30℃)对强化生物除磷(EBPR)的影响。结果表明,温度为20℃时,系统的磷去除率高于98%,厌氧释磷速率和好氧吸磷速率分别为55.70 mg P·(gVSS·h)^(-1)和45.16 mg P·(gVSS·h)^(-1),聚磷菌(PAOs)占总细菌(EUB)的比例达到90%,而聚糖菌(GAO)的比例只有1%;温度升高到25℃后,除磷效果不断降低,释磷速率和吸磷速率逐渐下降,PAOs的比例下降,而聚糖菌(GAOs)的比例不断增加;温度为30℃时,出水水质恶化,磷去除率仅为67%,释磷速率和吸磷速率分别为33.66 mg P·(gVSS·h)^(-1)和17.55 mg P·(gVSS·h)^(-1),GAOs的比例高达87%,而PAOs的比例仅为5%,在与PAOs的竞争中,GAOs处于优势,导致除磷效果降低。Fluorescence in situ hybridization（ FISH） was used to study the influence of water temperature（ 20 ℃,25℃,and 30℃） on the performance of enhanced biological phosphorus removal（ EBPR） in an anaerobic / aerobic sequencing batch reactor（ SBR）. At 20℃,phosphorus removal efficiency could surpass 98%,and phosphorus release and uptake rates were 55. 70 mg P·（gVSS·h）^（-1）and 45. 16 mg P·（gVSS·h）^（-1）,respectively. Furthermore,phosphorus accumulating organisms（ PAOs） accounted for 90% of microorganisms present in the activated sludge. At 25℃,phosphorus removal efficiency,phosphorus release and uptake rates,and the percentage of PAOs declined,but the proportion of glycogen accumulating organisms（ GAOs） increased.At 30℃,phosphorus removal efficiency decreased by 67%,and phosphorus release and uptake rates were 33. 66 mg P·（gVSS·h）^（-1）and 17. 55 mg P·（gVSS·h）^（-1）,respectively. Moreover,GAOs accounted for 80%while PAOs represented 5% of all microorganisms. We conclude that GAOs have a competitive advantage over PAOs at high temperatures,leading to lower phosphorus removal efficiency.

关 键 词：荧光原位杂交 温度 强化生物除磷 聚磷菌 聚糖菌 

分 类 号：X703[环境科学与工程—环境工程]