| 苯酚对氨氧化菌硝化和污泥性能冲击影响 |
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| 引用本文： | 路聪聪,葛士建,王淑莹,曹旭,彭永臻.苯酚对氨氧化菌硝化和污泥性能冲击影响[J].化工学报,2012,63(8):2576-2583. |
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| 作者姓名： | 路聪聪 葛士建 王淑莹 曹旭 彭永臻 |
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| 作者单位： | 北京工业大学北京市水质科学与水环境恢复工程重点实验室，北京市污水脱氮除磷处理与过程控制工程技术研究中心，北京 100124 |
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| 基金项目： | 国家自然科学基金，北京市教委科技创新平台项目，2012年学科与研究生教育-创新人才培养计划-博士生创新基金 |
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| 摘 要： | 以苯酚为毒性抑制剂，短程硝化污泥为对象，分析研究了不同苯酚浓度对氨氧化菌硝化过程的抑制特性和抑制动力学，以及对污泥胞外聚合物组分及呼吸速率的短期冲击影响。结果表明，55 mg·L-1苯酚的存在使硝化速率降低37%；低浓度苯酚条件下（< 80 mg·L-1）符合Monod单分子一级动力学方程，且为可逆性抑制，恢复后呼吸速率可达20～25 mg O2·L-1·h-1；且因接种污泥含大量异养菌使得抑制常数（52.871 mg·L-1）远大于纯硝化菌群系统。另外，苯酚的存在促使菌群启动自我保护机制产生更多的胞外聚合物(EPS)抵抗环境变化。苯酚浓度升至135 mg·L-1时，蛋白质和多糖分别增加87.4%和311.7%；而且EPS组分发生相应变化，蛋白质/多糖（P/C）与初始COD/氨氮（C/N）比呈负相关性，P/C从22.1降至3.80。
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| 关 键 词： | 短程硝化 氨氧化菌 抑制动力学 苯酚 胞外聚合物 耗氧呼吸速率 |
| 收稿时间： | 2011-11-28 |
| 修稿时间： | 2012-02-21 |
Shock effect of phenol on nitrification by ammonia oxidation bacteria and sludge performance |
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| LU Congcong
,
GE Shijian
,
WANG Shuying
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CAO Xu
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PENG Yongzhen.Shock effect of phenol on nitrification by ammonia oxidation bacteria and sludge performance[J].Journal of Chemical Industry and Engineering(China),2012,63(8):2576-2583. |
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| Authors: | LU Congcong GE Shijian WANG Shuying CAO Xu PENG Yongzhen |
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| Affiliation: | (Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | The kinetics of nitrification inhibition,the components of polymeric substances on extracellular and oxygen uptake rate(OUR)of partial nitrification sludge were studied at various concentrations of phenol that was served as short-term toxic inhibitor.The results showed that rate of ammonia nitrification reduced by 37% due to inhibition effect of phenol on the ammonia oxidation bacteria.Under low phenol concentrations(<80 mg·L-1),it followed Monod’s kinetics for single molecule inhibition,indicating that was a kind of reversible inhibition,and OUR achieved at 20—25 mg O2·L-1·h-1 after the rescission of inhibition.The inhibition constant(52.871 mg·L-1)of mixed sludge system used in this study was far larger than that of an enrichment nitrifier culture.In addition,the phenol promoted the starting of microbial self protection mechanism that could produce more extracellular polymeric substances(EPS)to resist environment change.With the phenol concentrations up to 135 mg·L-1,proteins and carbohydrate in EPS increased up to 87.4% and 311.7% respectively.The ratio of proteins to carbohydrates fell from 22.1 to 3.80 with the increasing initial COD/N. |
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| Keywords: | partial nitrification ammonia oxidation bacteria inhibition kinetics phenol extracellular polymeric substance oxygen uptake rate |
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