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.
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)
出处
《环境科学》
EI
CAS
CSCD
北大核心
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)。
关键词
异养硝化-好氧反硝化
混合菌
尿素
重金属离子
盐度
heterotrophic nitrification-aerobic denitrification
mixed bacteria strains
urea
heavy metal ions
salinity
