环境温度下SBR实现稳定部分亚硝化研究  

Achieving stable partial nitrification in SBR at ambient temperature

作　　者：张敏[1] 姜滢[1] 温婧玉 汪瑶琪 陈重军[1,2,3,4] 沈耀良 ZHANG Min;JIANG Ying;WEN Jing-yu;WANG Yao-qi;CHEN Chong-jun;SHEN Yao-liang(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou 215009,China;Jiangsu Key Laboratory of Environmental Science and Engineering,Suzhou 215009,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Jiangnan University,Wuxi 214122,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]江苏省水处理技术与材料协同创新中心,江苏苏州215009 [3]江苏省环境科学与工程重点实验室,江苏苏州215009 [4]江苏省厌氧生物技术重点实验室,江苏无锡214122

出　　处：《中国环境科学》2018年第12期4509-4515,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(51508366;51578353);江苏省厌氧生物技术重点实验开放基金资助项目(JKLAB201701)

摘　　要：采用SBR反应器建立了一套通过特定pH终值调控曝气停止点,以实现稳定部分亚硝化的策略,整个运行过程分为3个阶段,阶段Ⅰ启动亚硝化,阶段Ⅱ在稳定亚硝化的同时探索pH终值的设定规律,阶段Ⅲ采用pH终值设定规律实现稳定部分亚硝化,通过跨越夏、冬季(7～35℃)共148d的运行,考察SBR系统内有机物、氮素的转化规律,并分析不同温度(23、18、13℃)对部分亚硝化反应过程的影响.结果表明,在低DO(0.2～0.4mg/L)和MLSS为4000mg/L的条件下,控制pH终值为(7.73±0.02),使出水FA在0.5～1.2mg/L,可稳定部分亚硝化期间的出水NO_2^--N/NH_4^+-N值在1～1.4之间,出水亚硝积累率(NAR)维持在85%以上,有机物去除率在60%以上.比氨氧化速率、比亚硝态氮氧化速率、比COD去除速率均随温度下降而降低,但降低趋势较缓,且反应均能稳定完成.The SBR reactor was used to establish a strategy of stabilizing partial nitrification by controlling the stopping point of aeration through a specific pH final value.The whole operation process was divided into3phases,which were phase I starting nitrosation,phase II exploring the setting rule of the pH final value while stabilizing the nitrosation and phase III adopting the setting rule of pH final value to achieve stable partial nitrification.Across the summer and the winter(7~35℃)operation of a total of148days,the transformation of organic matter and nitrogen in the SBR system was investigated and the effects of different temperatures(23,18,13℃)on partial nitrosation were analyzed.The results showed that under low DO concentratin(0.2~0.4mg/L)and MLSS of4000mg/L,the NO2^--N/NH4^+-N value of the effluent was between1and1.4during stabilizing partial nitrification,and by controlling the pH final value which was(7.73±0.02),the effluent FA reached0.5~1.2mg/L,the accumulation rate of nitrosation(NAR)was maintained at85%and the removal rate of organic matter was above60%.Specific ammonia oxidation rate,specific nitrite oxidation rate and specific organic matter removal rate declined with the drop of temperature,but the decreasing trend was slow and the reaction could be completed stably.

关 键 词：环境温度 部分亚硝化 控制策略 pH终值 

分 类 号：X703[环境科学与工程—环境工程]