强化除磷膜生物反应器的缺氧吸磷特性  

Study on Characterization of Anoxic Phosphorus Uptake in EBPR-MBR

作　　者：王朝朝[1] 李军[1] 陈瑜[1] 王昌稳[1] 高金华[2] 常江[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京城市排水集团有限公司,北京100176

出　　处：《中国给水排水》2011年第19期1-5,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07314-008);北京工业大学研究生科技基金资助项目(ykh-2011-4735)

摘　　要：采用强化除磷膜生物反应器处理合成生活污水,在进水有机负荷和总氮负荷分别为0.08 kgCOD/(kgMLSS·d)和0.015 kgN/(kgMLSS·d)的条件下,能够稳定取得92.6%、77%的去除率,出水平均浓度分别为20.8、12.41 mg/L。在HRT为15、5 h、硝化液回流比为400%的条件下运行时,PAOs的释磷速率由第21天的4.2 mgPO_~4^(3-)-P/(gMLSS·h)增长到第60天的9.49 mg-PO_4^(3-)-P/(gMLSS·h),DPAOs与PAOs的吸磷速率分别由1.95、6.29 mgPO_4^(3-)-P/(gMLSS·h)提高到5.47、11.13 mgPO_4^(3-)P/(gMLSS·h),DPAOs占PAOs的比例由31%增长到49%,缺氧吸磷量提高了约6.6 mg/L,缺氧段的除磷率也由46.8%提高到了85.3%。在工艺运行稳定阶段,虽然PAOs和DPAOs的吸磷速率均有所增加,但是增幅均小于DPAOs富集阶段的,并且DPAOs/PAOs值稳定于50%左右,膜组件对胶体磷的截留保证了出水TP平均浓度在0.26 mg/L左右。An enhanced biological phosphorus removal （EBPR） membrane bioreactor was utilized to treat the synthetic wastewater. 92.6% of COD and 77% of TN can be removed in the case of 0.08 kg- COD/（kgMLSS · d） and O. 015 kgN/（kgMLSS · d） , and the effluent concentrations of COD and TN are 20.8 mg/L and 12.41 mg/L respectively. When HRT is 15.5 h and the nitrification liquid reflux ratio is 400% , phosphorus release rate of PAOs is increased from 4.2 mgPO4^3- -P/（gMLSS 4^3- h） on 21st day to 9, 49 mgPO43^- -P/（gMLSS · h） on 60th day, and phosphorus uptake rates of DPAOs and PAOs are increased from 1.95 mgPO4^3- - P/（ gMLSS · h） and 6.29 mgPO4^3- - P/（ gMLSS · h ） to 5.47 mgPO4^3- - P/ （gMLSS · h） and 11. 13 mgPO4^ -P/（gMLSS · h） respectively. The ratio of DPAOs to PAOs is increased from 31% to 49% , the anoxic phosphorus uptake is increased by 6.6 mg/L and the anoxic phosphorus removal rate is increased from 46.8% to 85.3%. Although the phosphorus uptake rates of PAOsand DPAOs are increased in the steady operation stage, the increase rates are lower than those during DPAOs accumulation, DPAOs/PAOs ratio tends to stabilize at 50% or so, and membrane retention of colloid phosphorus ensures that the concentration of TP is 0.26 mg/L on average.

关 键 词：膜生物反应器 营养物去除 强化除磷 缺氧吸磷 

分 类 号：X703[环境科学与工程—环境工程]