Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction

Desheng LI; Chao ZHANG; Shihai DENG; Zhifeng HU; Jinlong LI; Yuanhui LIU

doi:10.11949/j.issn.0438-1157.20181059

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Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction

Energy and environmental engineering | 更新时间：2026-07-24

- Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction
- CIESC Journal Vol. 70, Issue 3, Pages: 1065-1074(2019)
- 作者机构：
  
  1.北京交通大学土木建筑工程学院，北京 100044
  2.水中典型污染物控制与水质保障北京市重点实验室，北京 100044
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181059
  CLC： X 703
- Received：25 September 2018，
  
  Revised：2018-10-29，
  
  Online First：24 July 2026，
  
  Published：05 March 2019
- 稿件说明：
移动端阅览
李德生, 张超, 邓时海, 胡智丰, 李金龙, 刘元辉. 基于铁基质高效催化还原污水中硝酸盐氮的实验研究[J]. 化工学报, 2019, 70(3): 1065-1074

LI Desheng, ZHANG Chao, DENG Shihai, HU Zhifeng, LI Jinlong, LIU Yuanhui. Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction[J]. CIESC Journal, 2019, 70(3): 1065-1074
李德生, 张超, 邓时海, 胡智丰, 李金龙, 刘元辉. 基于铁基质高效催化还原污水中硝酸盐氮的实验研究[J]. 化工学报, 2019, 70(3): 1065-1074 DOI： 10.11949/j.issn.0438-1157.20181059.

LI Desheng, ZHANG Chao, DENG Shihai, HU Zhifeng, LI Jinlong, LIU Yuanhui. Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction[J]. CIESC Journal, 2019, 70(3): 1065-1074 DOI： 10.11949/j.issn.0438-1157.20181059.

摘要

污水厂排水中硝酸盐氮(

-N)浓度偏高，难利用常规生物脱氮工艺实现

-N的深度脱除。以铁基质高效催化脱氮载体为污水中

-N的脱除材料

，探究不同铁基质催化活性、pH和

-N浓度等对污水中

-N去除的影响及机制。研究结果表明：添加催化剂D的铁基质高效催化脱氮载体可脱除92.23%的

-N，调节污水为酸性至中性条件时，其

-N去除率均可达到92.09%以上，且氨氮(

-N)积累量先升高后降低；当污水为碱性条件时，

-N的去除率亦可达86.13%以上，且在碱性条件时无

-N积累；原水中

-N的浓度变化(20~70 mg·L

-1

)对铁基质高效催化脱氮载体的脱氮性能影响较小，

-N去除率均达到96.11%以上。与催化剂A、B和C相比，添加催化剂D的铁基质高效催化脱氮载体脱氮速率最快，

-N降解反应过程符合一级反应动力学方程，反应速率常数

=0.0170 min

–1

。

Abstract

It remains difficult to achieve effective nitrate removal with conventional biological nitrogen removal processes

for the high

-N concentration and low organic carbon in tail water from WWTP. Thus

ZVI-based catalyzed reduction was developed and applied in this study. The influence of catalytic activity of the catalysts

pH and

-N concentration on nitrate reduction by ZVI-based catalyzed reduction was studied

and the reaction mechanisms was investigated. The results show that the high-catalytic catalytic denitrification carrier with catalyst D can remove 92.23% of

-N

and the

-N removal rate can reach 92.09% when the wastewater is acidic to neutral. The

-N removal efficiency of above 86.13% was also achieved even under alkaline conditions

and no

-N accumulation was found. Increasing in

-N concentration (20—70 mg·L

–1

) showed little impact on nitrate reduction efficiency (remaining ≥96.11%). The nitrogen removal efficiency by ZVI-based catalyzed reduction in the presence of catalyst D obtained the highest speed when compared to catalysts A

B and C

and the reduction reaction was in keeping with the first-order kinetics equation with a calculated reaction rate constant of

=0.0170 min

–1

关键词

Keywords

references

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