A^2/O-MBBR反硝化除磷工艺中有机物的迁移转化及利用  

Migration and transformation and utilization of organic matter in A^2/O-MBBR denitrifying phosphorus removal process

作　　者：张淼[1] 张颖 黄棚兰 何成达[1] 彭永臻[3] 吴军[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]扬州市洁源排水有限公司,江苏扬州225002 [3]北京工业大学国家工程实验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124

出　　处：《中国环境科学》2017年第11期4132-4139,共8页China Environmental Science

基　　金：江苏省自然科学基金资助项目(BK20170506);扬州市横向科研项目(204032264);扬州大学科研启动项目(137011060)

摘　　要：采用厌氧/缺氧/好氧与移动床生物膜反应器(A^2/O-MBBR)组成的双污泥系统处理实际生活污水,通过投加乙酸钠调节进水碳氮比(C/N),考察系统中有机物的转化利用和代谢途径.试验结果表明:当进水C/N在3.11~6.09范围内波动时,系统均可实现COD的高效去除,最大去除率可达83.85%;但是从VFA和PHAs的转化利用角度,进水C/N不宜超过5.42.此外,碳平衡分析结果也表明,当进水C/N小于5.42时,A^2/O反应器去除的COD百分比最高可达70.10%,MBBR反应器氧化的COD仅占4.32%~5.89%,低C/N条件下碳源的高效利用是促进菌群优化以及提高脱氮除磷效率的关键所在.溶解性碳源组分分布及三维荧光特性的结果显示,尽管系统沿程COD浓度变化不大,但蛋白质和多糖之间存在着转化,且类蛋白物质占主导地位.A two-sludge system combined anaerobic/anoxic/oxic with moving bed biofilm reactor （A2/O-MBBR） was used to treat real domestic wastewater. By adding sodium acetate to adjust influent carbon/nitrogen ratio （C/N）, the transformation and utilization and metabolic pathways of organic matter in the system were investigated. When the influent C/N ratio varied from 3.11 to 6.09, the system all achieved efficient COD removal with the maximum removal of 83.85%. However, from the perspective of VFA and PHAs transformation, the influent C/N ratio should not exceed 5.42. Additionally, the material balance analysis of carbon also revealed that when the influent C/N ratio was below 5.42, COD removal percentage in the A2/O reactor was up to 70.10% and that in the MBBR reactor only accounted for 4.32%~5.89%, where the efficient utilization of carbon source was the key to improve microbial community optimization and enhance denitrification and phosphorus removals under the condition of low C/N ratio. The results of dissolved carbon source component distribution and three-dimensional fluorescence properties manifested that proteins and polysaccharides transformed although COD changed gently along the reactor, in which proteins-like substance was the dominant.

关 键 词：A2/O-MBBR工艺 迁移转化 代谢途径 溶解性有机物 三维荧光光谱 

分 类 号：X703.1[环境科学与工程—环境工程]