温度、DO及C/N值对SBBR工艺脱氮除磷的影响  

Effects of Temperature,DO and C/N Ratio on Nitrogen and Phosphorus Removal in SBBR Process

作　　者：罗忆涵 陈莹[1] 解舒婷 赵剑强[1] LUO Yi-han;CHEN Ying;XIE Shu-ting;ZHAO Jian-qiang(School of Water and Environment,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710064

出　　处：《中国给水排水》2021年第9期82-89,共8页China Water & Wastewater

基　　金：宁夏回族自治区重点研发计划(重点)项目(2019BFG02031);国家自然科学基金资助项目(51778057)。

摘　　要：采用以An/O/A(厌氧/好氧/缺氧)模式运行的序批式生物膜反应器(SBBR)工艺对模拟宁夏农村生活污水进行处理,考察温度、DO及C/N值对SBBR工艺脱氮除磷效果的影响。结果表明,SBBR系统可以呈现良好的同步硝化反硝化(SND)效果,系统在C/N值为6、DO为1.4~1.6 mg/L、温度分别为30℃和20℃两种工况下,对氮、磷的平均去除率分别为98.25%、81.56%和91.63%、96.03%,出水水质满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准。该工艺在深度脱氮情况下后置缺氧段存在二次释磷现象,通过调整DO浓度,该工艺在温度为30℃、C/N值为6、DO为2.9~3.1 mg/L的条件下,出水水质可达到GB 18918—2002的一级A标准。Synthetic rural domestic sewage was treated by a laboratory scale sequencing batch biofilm reactor(SBBR)which was operated in An/O/A(anaerobic/oxic/anoxic)mode in Ningxia,and the effects of temperature,DO and C/N ratio on removal performances of nitrogen and phosphorus were investigated.The SBBR system showed a good simultaneous nitrification and denitrification(SND)performance.When the system was operated at temperature of 30℃and 20℃with C/N ratio of 6 and DO of 1.4-1.6 mg/L,the removal efficiencies of nitrogen and phosphorus were 98.25%,81.56%and 91.63%,96.03%,respectively,and the effluent quality could meet the first level B limitation of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).In the process of deep denitrification,there was a secondary phosphorus release phenomenon in the post-anoxic section.By adjusting the concentration of DO,the effluent quality met the first level A limitation of GB 18918-2002 when temperature,C/N ratio and DO were 30℃,6 and 2.9-3.1 mg/L.

关 键 词：农村生活污水 序批式生物膜反应器(SBBR) 脱氮除磷 同步硝化反硝化(SND) 

分 类 号：TU992[建筑科学—市政工程]