| 高亚硝态氮钝化清洗废水的生物处理及过程控制 |
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| 引用本文： | 董怡君,王淑莹,张宇坤,彭永臻.高亚硝态氮钝化清洗废水的生物处理及过程控制[J].化工学报,2014,65(8):3164-3169. |
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| 作者姓名： | 董怡君 王淑莹 张宇坤 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： | 国家高技术研究发展计划项目（2012AA063406）；北京市教委科技创新平台项目。 |
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| 摘 要： | 钝化清洗废水含有高浓度亚硝态氮，采用普通活性污泥难以进行生物处理。采用亚硝态氮废水富集亚硝态氮氧化菌（NOB），以富含NOB污泥的SBR装置处理模拟化学清洗钝化废水，并提出了该处理工艺的过程控制策略。结果表明：该工艺可以在300 min内完全氧化亚硝态氮浓度高达2000 mg·L-1的钝化废水，高浓度亚硝态氮没有对生物降解过程产生明显抑制；反应过程中DO浓度的变化与亚硝态氮氧化过程存在相关性，溶解氧浓度的移动斜率变化（DO-MSC）可作为亚硝态氮氧化过程控制参数；当DO-MSC >0.02时，亚硝态氮氧化过程结束，此时可停止曝气。批次试验结果显示在不同曝气量（0.02～0.125 m3·h-1）和不同温度条件（15～30℃）下，DO-MSC指数均可有效指示亚硝态氮氧化终点。
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| 关 键 词： | 废水 亚硝态氮 SBR DO-MSC 过程控制 曝气 温度 |
| 收稿时间： | 2013-10-28 |
| 修稿时间： | 2014-02-17 |
Biological treatment of high concentration NO2--N in passivation washing wastewater and process control strategy |
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| DONG Yijun,WANG Shuying,ZHANG Yukun,PENG Yongzhen.Biological treatment of high concentration NO2--N in passivation washing wastewater and process control strategy[J].Journal of Chemical Industry and Engineering(China),2014,65(8):3164-3169. |
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| Authors: | DONG Yijun WANG Shuying ZHANG Yukun PENG Yongzhen |
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| Affiliation: | Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | Biological treatment of high concentration NO2--N in passivation washing wastewater is difficult. In this paper nitrite oxidizing bacteria (NOB) was enriched by feeding NO2--N wastewater, NOB-rich activated sludge was used in an SBR system to treat simulated passivation washing wastewater, and a process control strategy was put forward. The results showed that using the process passivation washing wastewater with NO2--N concentration 2000 mg·L-1 could be totally oxidized within 300 min. The nitrite oxidation process was not inhibited by the high NO2--N concentration. Furthermore, this process had a correlation with the variation of DO concentration during reaction. DO-MSC, a parameter of the process control strategy, indicated the end of the reaction when it was more than 0.02. The results of batch tests showed that the DO-MSC could indicate the end of the nitrite oxidation process both in different aeration rates(0.02-0.125 m3·h-1) and different temperature(15-30℃). |
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| Keywords: | wastewater nitrite SBR DO-MSC process control aeration temperature |
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