Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO<sub>x</sub> removal

LIN Tianming; ZHOU Zuoming; JING Guohua College of Chemical Engineering

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Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO_x removal

更新时间：2025-09-28

- Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO_x removal
- Thermal Power Generation Vol. 42, Issue 8, Pages: 49-54(2013)
- 作者机构：
  
  华侨大学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X511
- Published：2013
- 稿件说明：
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LIN Tianming, ZHOU Zuoming, JING Guohua College of Chemical Engineering. Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO_x removal[J]. Thermal power generation, 2013, 42(8): 49-54.
DOI：

LIN Tianming, ZHOU Zuoming, JING Guohua College of Chemical Engineering. Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO_x removal[J]. Thermal power generation, 2013, 42(8): 49-54. DOI：

摘要

分析了固定化微生物两级还原耦合络合吸收工艺脱除NOx的动力学过程

建立了生物反应器内固定化微生物还原Fe(Ⅱ)EDTA-NO和Fe(Ⅲ)EDTA的生化反应模型以及固定化生物小球的扩散-反应模型。分析结果表明:固定化反硝化菌还原Fe(Ⅱ)EDTA-NO的最大反应速度γmax为6.97×10-6 mmol/(m3·s-1)

半饱和常数Km为0.001 6mmol/m3;固定化铁还原菌还原Fe(Ⅲ)EDTA的最大反应速度γ′max为6.805×10-5 mmol/(m3·s-1)

半饱和速率常数K′m为0.013 73mmol/m3;Fe(Ⅱ)EDTA-NO和Fe(Ⅲ)EDTA的微生物还原过程均由内扩散控制

后期设计运用中应着力提高小球内反应物的扩散速率。

Abstract

The kinetic process of NOxremoval by employing an integrated process of metal chelate absorption coupled with two-stage bio-reduction using immobilized microorganisms was investigated.Several models were developed such as the bio-reduction of Fe(Ⅱ)EDTA-NO and Fe(Ⅲ)EDTA in immobilized microorganisms reactor and diffusion-reaction in immobilized beads.The results indicated that the maximum reaction rate of Fe(Ⅱ)EDTA-NO reduction by immobilized bacteria in bio-reactor was 6.97×10-6 mmol/(m3.s-1)and the half-saturation constant was 0.001 6mmol/m3.The maximum reaction rate of Fe(Ⅲ)EDTA reduction by immobilized bacteria in bio-reactor was 6.805×10-5 mmol/(m3.s-1)and the half-saturation constant was 0.013 73 mmol/m3.Furthermore

the bioreduction of Fe(Ⅱ)EDTA-NO and Fe(Ⅲ)EDTA were both controlled by interior diffusion.

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Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NOx removal

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Kinetics study on chelate absorption coupled with two-stage bio-reduction by immobilized microorganisms in NO_x removal