碳源投加方式对低C/N污水脱氮除磷性能及菌群结构影响  

EFFECTS OF CARBON RESOURCE ADDITON STRATEGIES ON PHOSPHORUS AND NITROGEN REMOVAL AND MICROBIAL COMMUNITY STRUCTURE IN AN A^(2)/O SYSTEM

作　　者：姚创 刘建新 赵子玲 林国颖 刘晖[3] YAO Chuang;LIU Jianxin;ZHAO Ziling;LIN Guoying;LIU Hui(Guangdong Wastewater Treatment Engineering Technology Center of Standard&Efficiency Increasing and Resource Recycling,Guangdong Research Institute of Engineering Technology Co.,Ltd,Guangzhou 510440,China;Guangdong Provincial Academy of Building Research Group Co.,Ltd,Guangzhou 510500,China;Department of Environmental Science and Engineering,Zhongkai University of Agricultural and Engineering,Guangzhou 510225,China)

机构地区：[1]广东省工程技术研究所有限公司广东省污水处理提标增效及资源化利用工程技术研究中心,广州510440 [2]广东省建筑科学研究院集团股份有限公司,广州510500 [3]仲恺农业工程学院资源与环境学院,广州510225

出　　处：《环境工程》2022年第1期21-26,223,共7页Environmental Engineering

基　　金：广东省科技计划项目(2017A070702021)。

摘　　要：为揭示碳源投加方式对低碳污水氮磷去除影响,采用A^(2)/O系统处理模拟低C/N(C/N为2.0-4.0)污水,分别在污泥回流池、进水端投加碳源,对比研究2种方式条件下的系统氮磷污染物去除效果及微生物菌群结构特点。结果表明:与传统进水端投加碳源方式(阶段Ⅳ)相比,在污泥回流池投加等量碳源(阶段Ⅲ),有利于实现更佳的脱氮除磷效果。阶段Ⅲ的TN、TP去除率分别为54.5%、63.9%,高于阶段Ⅳ的氮、磷去除率(TN和TP去除率分别为44.9%、21.7%)。高通量测序结果表明:2种碳源投加方式均改变了微生物菌群丰富度和多样性,且在污泥回流池投加碳源更有利于优势菌群的富集,该阶段红游动菌属(Rhodoplanes,2.3%)、脱氯单胞菌属(Dechloromonas,1.6%)及生丝菌属(Hyphomicrobium,1.4%)为优势菌属,其比例均高于阶段Ⅳ。To reveal the effect of carbon resource addition strategies on nitrogen and phosphorus removal in low carbon wastewater, an A^(2)/O system was employed to treat the simulated low C/N wastewater(C/N 2.0-4.0) with carbon resource addition respectively at the sludge return tank and the water inlet. The nitrogen and phosphorus removal efficiency and microbial community structure were comparatively investigated under different conditions. Results showed that higher removal efficiency of nitrogen and phosphorus was easily achieved by adding the same amount of carbon source to the sludge return tank(stage Ⅲ), compared with the traditional way of adding carbon source at the water inlet(stage Ⅳ). When the A^(2)/O system was stably operated at stage Ⅲ, the removal rate of TN and TP was 54.5% and 63.9% respectively, higher than that at stage Ⅳ(the removal rate of TN and TP was 44.9% and 21.7%, respectively). High-throughout sequencing results indicated that the microbial abundance and diversity changed with carbon resource addition strategies. Meanwhile, the way of adding carbon source to the sludge return tank was conducive to the enrichment of dominant flora. Rhodoplanes(2.3%), Dechloromonas(1.6%) and Hyphomicrobium(1.4%) was the dominant genus at stage Ⅲ, and the proportions of the above three genus were also higher than that in stage Ⅳ when the carbon resource was added to the inlet.

关 键 词：A^(2)/O工艺 碳源投加方式 脱氮除磷 菌群结构 

分 类 号：X703[环境科学与工程—环境工程]