全程低氧曝气SBMBBR系统除磷性能研究  

Phosphorus Removal Performance of SBMBBR System under Low DO All-time Aeration

作　　者：曹建平[1,2] 张朝升[1] 杨凤霞[1] 荣宏伟[1] 韦伟[1] 

机构地区：[1]广州大学省部共建教育部珠江三角洲水质安全与保护实验室,广东广州510006 [2]东华理工大学给排水科学与工程系,江西南昌330013

出　　处：《中国给水排水》2017年第17期98-102,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(21477027;51278133);广东省科技计划项目(2014A020216048);江西省教育厅科技项目(GJJ14482)

摘　　要：利用SBMBBR系统,在全程曝气条件下研究了不同DO工况对污染物去除效果的影响。结果表明,不同DO工况下系统对COD、N和P都能较好地去除,出水水质可达《城镇污水处理厂污染物排放标准》的一级A标准。在进水PO_4^(3-)-P浓度为42.3 mg/L的情况下,出水PO_4^(3-)-P<0.5 mg/L,说明全程曝气SBMBBR系统具有很好的除磷性能。不同DO工况下,释磷量及释磷速率随曝气量的减小而减小,平均吸磷速率随着曝气量的减小而降低,相应的吸磷时间变长,但是在反应周期内,磷均能得到去除。在全程DO浓度<0.30 mg/L的条件下,系统出水PO_4^(3-)-P浓度<0.5 mg/L,说明好氧段并不是SBMBBR除磷的必要条件,在全程低氧曝气条件下可稳定高效除磷。The effect of different DO conditions on the removal of pollutants by the SBMBBR sys- tem under the condition of all-time aeration was studied. The results showed that COD, N and P were all efficiently removed under different DO conditions, and the effluent reached grade A standards. When in- fluent phosphate concentration was as high as 42.3 mg/L, the effluent phosphate concentration was hess than 0.5 mg/L, indicating that the SBMBBR system under the condition of all-time aeration had good phosphorus removal performance. Under different DO conditions, with the decrease of the aeration rate, the rate and quantity of phosphorus release decreased, the average phosphorus uptake rate decreased, and the phosphorus uptake time was extended. However, all phosphorus was removed within the reaction cycle. When DO was less than O. 30 mg/L, the phosphate concentration in effluent was less than 0.5 mg/L, which indicated that the aerobic condition stage was unnecessary for the removal of phosphorus in SBMBBR, and phosphorus could be removed stably and efficiently under the condition of all-time low DOaeration.

关 键 词：SBMBBR 低氧曝气 除磷 污泥膨胀 

分 类 号：X703[环境科学与工程—环境工程]