Study on treatment of biological catalytic filter and membrane fouling with bimetallic catalyst as filter media

Songze HAO; Hongwei ZHANG; Yun WU; Jie WANG

doi:10.11949/0438-1157.20190390

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Study on treatment of biological catalytic filter and membrane fouling with bimetallic catalyst as filter media

Energy and environmental engineering | 更新时间：2020-06-24

- Study on treatment of biological catalytic filter and membrane fouling with bimetallic catalyst as filter media
- CIESC Journal Vol. 70, Issue 11, Pages: 4377-4386(2019)
- 作者机构：
  
  1.省部共建分离膜与膜过程国家重点实验室，天津 300387
  2.天津工业大学材料科学与工程学院，天津 300387
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190390
  CLC： TQ 028.8
- Received：16 April 2019，
  
  Revised：2019-07-26，
  
  Published：05 November 2019
- 稿件说明：
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郝松泽, 张宏伟, 吴云, 王捷. 双金属催化滤料生物滤池处理效果及对膜污染影响研究[J]. 化工学报, 2019, 70(11): 4377-4386

HAO Songze, ZHANG Hongwei, WU Yun, WANG Jie. Study on treatment of biological catalytic filter and membrane fouling with bimetallic catalyst as filter media[J]. CIESC Journal, 2019, 70(11): 4377-4386
郝松泽, 张宏伟, 吴云, 王捷. 双金属催化滤料生物滤池处理效果及对膜污染影响研究[J]. 化工学报, 2019, 70(11): 4377-4386 DOI： 10.11949/0438-1157.20190390.

HAO Songze, ZHANG Hongwei, WU Yun, WANG Jie. Study on treatment of biological catalytic filter and membrane fouling with bimetallic catalyst as filter media[J]. CIESC Journal, 2019, 70(11): 4377-4386 DOI： 10.11949/0438-1157.20190390.

摘要

双金属催化滤料生物滤池替代传统生物滤池，作为超滤膜系统的预处理工艺，可提高三氮的去除效率，保证产水水质稳定，显著减缓超滤膜污染，延长膜使用寿命。生物催化滤池内催化还原反应促进反硝化系统的进行，保证了水中硝酸氮和亚硝酸氮的分解去除；研究表明，生物催化滤池预处理较常规生物滤池可将TOC的去除率由73.2%提高到81.5%，其增加部分的主要成分为可引起膜污染的芳香蛋白类和富里酸类有机污染物。此外，双金属催化滤料增加了滤池的过滤精度，其出水胶体平均粒径明显小于常规生物滤池。催化还原反应产生的铁离子在过滤紊流的环境中微絮凝，进一步去除了微污染水源水中的胶体和悬浮物，减轻了胶体颗粒对超滤膜的污染。除具有常规滤池的生物降解、过滤作用外，双金属催化滤料生物滤池还具有催化还原和微絮凝的协同作用，显著提高了水中有机污染物和胶体颗粒的去除率，超滤膜污染得到有效减缓。

Abstract

As a pretreatment process of the ultrafiltration membrane system

the bimetal catalyst biological filter replaces the traditional biological filter

can improve the removal efficiency of tri-nitrogen

ensure the stability of water quality

significantly mitigate the ultrafiltration membrane foulling and extend the service life of the membrane. The catalytic reduction reaction in the biocatalytic filter promotes the denitrification system and ensures the decomposition and removal of nitrogen nitrate and nitrite in the water. The results showed that the removal rate of TOC was increased from 73.2% to 81.5% by the pretreatment of the biological catalytic filter compared with the conventional biological filter. In addition

the modified bimetal catalytic filter material increased the filtration accuracy of the filter

and the average particle size of the effluent colloid was significantly smaller than that of the conventional biological filter. The iron ions produced by catalytic reduction reaction flocculate in the environment of filtering turbulent flow

further remove the colloid and suspended matter in the micro-polluted water source

and mitigate ultrafiltration membrane foulling by the colloid particles . In addition to the biodegradation and filtration effects of conventional filters

the biological catalytic filter also has a combined effect of catalytic reduction and microflocculation

significantly improving the removal rate of organic pollutants and colloidal particles in water

and effectively reducing the pollution of ultrafiltration membrane.

关键词

Keywords

references

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