异养硝化-好氧反硝化混合菌对尿素的去除及重金属和盐度的影响  

Removal of Urea by Heterotrophic Nitrification-Aerobic Denitrification Mixed Strains and Effects of Heavy Metals and Salinity

作　　者：王萌萌 曹刚 张迪 冯乃宪 潘涌璋 WANG Meng-meng;CAO Gang;ZHANG Di;FENG Nai-xian;PAN Yong-zhang(School of Environment,Jinan University,Guangzhou 511443,China;Guangdong Engineering Center for Environment Contamination Control and Restorative Materials,Guangzhou 510630,China)

机构地区：[1]暨南大学环境学院,广州511443 [2]广东省污染控制与修复材料工程技术中心,广州510630

出　　处：《环境科学》2020年第6期2787-2795,共9页Environmental Science

基　　金：广州市科技计划项目(201903010031);广东省自然科学基金研究团队项目(2016A030312009);广东省环境污染控制与修复材料工程技术研究中心建设项目(2015B090903070)。

摘　　要：为探究异养硝化-好氧反硝化混合菌对尿素的去除效果,本文考察了混合菌(DM01+YH01+YH02)对尿素的去除特性,以及重金属和盐度对其去除率的影响.结果表明,当废水中尿素质量浓度为200.0 mg·L^-1,碳源为柠檬酸三钠、C/N为10、温度为30℃、pH为7和转速为130 r·min^-1时,尿素在24 h可以得到高效降解,去除率为91.8%;重金属离子(Ni^2+、Cd^2+、Cu^2+和Zn^2+)会降低混合菌对尿素的去除效果,影响能力的大小顺序为Cd^2+>Cu^2+>Ni^2+>Zn^2+,然而,Fe^2+(<20.0 mg·L^-1)会增强混合菌对尿素的去除效果;盐度(>10.0 mg·L^-1)会抑制混合菌株对于尿素的去除.To explore the effect of heterotrophic nitrification-aerobic denitrification mixed strains on urea removal,the removal characteristics of urea and effects of heavy metals and salinity on urea removal by mixed strains(DM01+YH01+YH02)were investigated.The results showed that urea could be efficiently degraded by mixed strains at 24 h in 200.0 mg·L^-1 urea wastewater when the carbon source was sodium citrate,C/N was 10,temperature was 30℃,pH was 7,and rotation speed was 130 r·min^-1.Heavy metal ions(Ni2+,Cd2+,Cu2+,and Zn2+)can reduce the removal efficiency of urea by mixed strains,and the degree of influence was Cd2+>Cu2+>Ni2+>Zn2+.Fe2+(<20.0 mg·L^-1)in urea wastewater can enhance the removal efficiency of urea by mixed strains.Furthermore,a salinity of more than 10.0 mg·L^-1 in urea wastewater can reduce the removal efficiency of urea by mixed strains.

关 键 词：异养硝化-好氧反硝化 混合菌 尿素 重金属离子 盐度 

分 类 号：X703[环境科学与工程—环境工程]