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作 者:张昭[1,2] 李冬[1] 曾辉平[1] 周利军[1] 曾涛涛[3] 张杰[1,3]
机构地区:[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]中国建筑科学研究院建筑设计院,北京100013 [3]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090
出 处:《中国给水排水》2013年第23期18-22,共5页China Water & Wastewater
基 金:国家自然科学基金资助项目(50878003);北京市自然科学基金资助项目(8092006);城市水资源与水环境国家重点实验室开放基金资助项目(QAK201005);教育部新世纪优秀人才支持计划项目(NCET-10-0008)
摘 要:在常温(16.4~25.5℃)及限氧(DO〈0.80mg/L)条件下,以处理城市污水的A/O除磷工艺出水为原水,采用中试规模(1.2m^3)的推流式反应器进行部分亚硝化试验。控制稀释率为2.26—3.37d~,调整4个格室的DO分别在(0.40~0.60)、(0.25~0.45)、(0.05—0.10)、(0.40—0.60)mg/L和(0.10~0.20)、(0.60-0.80)、(0—0.05)、(0~0.05)mg/L,均能实现部分亚硝化且效果稳定,亚硝化率超过95%,氨氧化率稳定在55%左右,出水NO2^-;-N/NH;-N平均值为1.08。交替好氧/缺氧条件下,在较长的运行时间(180d)内,反应器的总氮损失小于5mg/L,未有厌氧氨氧化现象发生。FISH定量分析表明,氨氧化菌(AOB)占总茵群的比例为44%,亚硝酸盐氧化菌(NOB)为7.8%,AOB在整个茵群中占主导优势。The effluent of an anaerobic/aerobic (A/O) process which removes phosphorus from municipal wastewater was used as influent of a partial nitritation process in pilot scale plug flow reactor ( 1.2 m3 ) with room temperature ( 16.4 to 25.5 ℃ ) and limited oxygen ( DO 〈0.80 mg/L). When the dilution rate was between 2.26 and 3.37 d-1, and the DO concentrations in four compartments were controlled at 0.40 -0.60, 0.25 -0.45, 0.05 -0.10, 0.40 - 0.60 mg/L, and 0.10 - 0.20, 0.60 - 0.80, 0 -0.05, 0 -0.05 mg/L respectively, stable partial nitritation was achieved with nitritation rate of over 95% , ammonia oxidation rate of around 55% and average effluent NO2- - N/NH4 - N of 1.08. Under alternating aerobic/anoxic conditions, during the 180 d operation, the loss of total nitrogen from the reactor was less than 5 mg/L and anaerobic ammonium oxidation (ANAMMOX) did not occur. Quantitative analysis by fluorescence in-situ hybridization (FISH) revealed that ammonia-oxidizing bacte- ria (AOB) and nitrite-oxidizing bacteria (NOB were 44% and 7.8% of the total bacterial population, suggesting that AOB were dominant bacteria.
关 键 词:低C N值污水 部分亚硝化 交替好氧 缺氧 推流式反应器 比氨氧化速率
分 类 号:X703[环境科学与工程—环境工程]
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