Ni^2+对好氧颗粒污泥系统性能的影响  

Effect of Ni^2+on the performance of aerobic granular sludge system.

作　　者：张春晖[1] 鲁文静 苏长罗 全炳旭 李彩璇 王文倩 孙桂容 唐佳伟[1] 唐元晖[1] ZHANG Chun-hui;LU Wen-jing;SU Chang-luo;QUAN Bing-xu;LI Cai-xuan;WANG Wen-qian;SUN Gui-rong;TANG Jia-wei;TANG Yuan-hui(School of Chemical and Environmental Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Shanxi Coal Industry Chemical Technology Research Institute,Xi′an 710000,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]陕西煤业化工技术研究院,陕西西安710000

出　　处：《中国环境科学》2020年第11期4721-4727,共7页China Environmental Science

基　　金：国家重点研发计划项目(2018YFC0406400);中央高校基本科研业务经费资助项目(2011QH01)。

摘　　要：以城镇污水处理厂A2/O工艺的回流污泥作为接种污泥,在序批式反应器(SBR)中培养好氧颗粒污泥(AGS),探究Ni^2+对AGS系统的影响.结果表明:在25℃的条件下,50d左右培养出成熟的AGS,其形态多呈球状或椭球状,外表分布着少量丝状菌,颗粒污泥粒径主要在2~4mm,MLSS达6000mg/L,SVI维持在40~50mL/g.将Ni^2+作用于培养出的成熟AGS,Ni^2+在0~2mg/L的浓度范围内会提高AGS的稳定性,使MLSS上升,SVI降低;同时会促进AGS分泌胞外多聚物(EPS),EPS组成成分中的蛋白质(PN)明显多于多糖(PS);Ni^2+对好氧颗粒污泥去除总氮(TN)的抑制程度要大于COD,最终COD去除率可维持在95%以上,TN去除率可维持在70%以上.The impact of Ni^2+on the aerobic granular sludge(AGS)system was explored by inoculating the return sludge from A2/O process of a municipal wastewater treatment plant in sequencing batch reactor(SBR).The mature AGS cultured at 25℃for about 50 days had a morphology of sphere or ellipsoid with a small number of filamentous bacteria on the surface,and a particle size of 2~4mm.The AGS system keeps a mixed liquid suspended solids(MLSS)of 6000mg/L and sludge volume index(SVI)at 40~50mL/g.Ni^2+in the concentration range of 0~2mg/L will improve the stability of AGS,increase MLSS,and decrease SVI.Meanwhile,the extracellular polymeric substances(EPS)in AGS increased with the addition of Ni^2+and contained significantly more protein(PN)than polysaccharide(PS).The inhibition of Ni^2+on removal of total nitrogen(TN)by AGS was greater than that of chemical oxygen demand(COD).Finally,the removal rate of COD and TN could be maintained above 95%and 70%,respectively.

关 键 词：好氧颗粒污泥 镍离子 胞外多聚物 去除率 

分 类 号：X703[环境科学与工程—环境工程]