Biological treatment of high concentration NO<sub>2</sub><sup>-</sup>-N in passivation washing wastewater and process control strategy

DONG Yijun; WANG Shuying; ZHANG Yukun; PENG Yongzhen

doi:10.3969/j.issn.0438-1157.2014.08.043

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Biological treatment of high concentration NO₂^--N in passivation washing wastewater and process control strategy

更新时间：2025-12-10

- Biological treatment of high concentration NO₂^--N in passivation washing wastewater and process control strategy
- CIESC Journal Issue 8, Pages: 3164-3169(2014)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.08.043
  CLC： 703
- Online First：05 August 2014，
  
  Published：05 August 2014
- 稿件说明：
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DONG Yijun, WANG Shuying, ZHANG Yukun, et al. Biological treatment of high concentration NO₂^--N in passivation washing wastewater and process control strategy[J]. CIESC Journal, 2014, (8): 3164-3169. DOI: 10.3969/j.issn.0438-1157.2014.08.043.
DOI：

DONG Yijun, WANG Shuying, ZHANG Yukun, et al. Biological treatment of high concentration NO₂^--N in passivation washing wastewater and process control strategy[J]. CIESC Journal, 2014, (8): 3164-3169. DOI: 10.3969/j.issn.0438-1157.2014.08.043. DOI：

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。

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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Biological treatment of high concentration NO2--N in passivation washing wastewater and process control strategy

DOI：10.3969/j.issn.0438-1157.2014.08.043

摘要

Abstract

关键词

Keywords

references

Biological treatment of high concentration NO₂^--N in passivation washing wastewater and process control strategy