中文关键词异养硝化-好氧反硝化混合菌尿素重金属离子盐度 英文关键词heterotrophic nitrification-aerobic denitrificationmixed bacteria strainsureaheavy metal ionssalinity

作者	单位	E-mail
王萌萌	暨南大学环境学院, 广州 511443	2545526118@qq.com
曹刚	暨南大学环境学院, 广州 511443	cao_g@163.com
张迪	暨南大学环境学院, 广州 511443
冯乃宪	广东省污染控制与修复材料工程技术中心, 广州 510630
潘涌璋	暨南大学环境学院, 广州 511443

中文摘要 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（Ni²⁺、Cd²⁺、Cu²⁺和Zn²⁺）会降低混合菌对尿素的去除效果，影响能力的大小顺序为 Cd²⁺ > Cu²⁺ > Ni²⁺>Zn²⁺，然而，Fe²⁺（< 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. 英文摘要 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.

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