| 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 |
| 摘要点击 1470 全文点击 522 投稿时间：2019-11-13 修订日期：2019-12-28 |
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| 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 denitrification mixed bacteria strains urea heavy metal ions salinity |
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| 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. |
