逆向-同向流气浮工艺构建与运行特性

doi:10.11949/j.issn.0438-1157.20160917

化工学报 ›› 2016, Vol. 67 ›› Issue (12): 5252-5258.DOI: 10.11949/j.issn.0438-1157.20160917

逆向-同向流气浮工艺构建与运行特性

王永磊^1,2, 刘宝震^1,2, 张克峰^1,2, 李梅^1,2, 贾瑞宝³, 宋武昌³, 李军⁴

1 山东建筑大学市政与环境工程学院, 山东济南 250100;
2 山东省绿色建筑协同创新中心, 山东济南 250100;
3 山东省城市供排水水质监测中心, 山东济南 250021;
4 北京工业大学建筑工程学院北京市水质科学与水环境恢复工程重点实验室, 北京 100124

收稿日期:2016-07-04 修回日期:2016-08-28 出版日期:2016-12-05 发布日期:2016-12-05
通讯作者: 王永磊(1977-),男,博士,副教授。wyl1016@sina.com
基金资助:
山东省科技发展计划项目（2014GSF120003）；住房和城乡建设部科学技术项目计划项目（2014-K5-026）；山东省自然科学基金项目（ZR2016EEM32）；山东建筑大学博士基金项目（XNBS1511）。

Construction and operation characteristics of countercurrent-cocurrent dissolved air flotation

WANG Yonglei^1,2, LIU Baozhen^1,2, ZHANG Kefeng^1,2, LI Mei^1,2, JIA Ruibao³, SONG Wuchang³, LI Jun⁴

1 College of Environmental and Municipal Engineering, Shandong Jianzhu University, Jinan 250100, Shandong, China;
2 Shandong Province Co-Innovation Center of Green Building, Jinan 250100, Shandong, China;
3 Shandong Province City Water Supply and Drainage Water Quality Monitoring Center, Jinan 250021, Shandong, China;
4 Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

Received:2016-07-04 Revised:2016-08-28 Online:2016-12-05 Published:2016-12-05
Supported by:
supported by the Shandong Province Science and Technology Development Projects(2014GSF120003), Ministry of Housing and Urban-Rural Development Technology Projects(2014-K5-026), the Natural Science Foundation of Shandong Province(ZR2016EEM32) the Doctoral Fund of Shandong Jianzhu University in 2015(XNBS1511).

摘要/Abstract

摘要：

针对传统溶气气浮（DAF）工艺中气泡对絮体颗粒捕集、黏附效率低，泡絮体黏附不稳定等问题，基于泡絮碰撞黏附理论，研发了集逆向流与同向流于一体的DAF工艺（CCDAF）。该工艺溶气水分两次投加，接触室分为碰撞接触室和黏附接触室。试验结果表明，CCDAF工艺显著提高了泡絮黏附效率和泡絮体稳定性，对浊度、藻类平均去除率达到96.4%、96.50%，出水颗粒物以2~7 μm粒径为主。工艺主要去除大分子、疏水性有机物，COD_Mn、UV₂₅₄、DOC平均去除率分别达到37.6%、46.3%和32.11%，CCDAF比同向流及逆向流DAF除污染效能更加显著。泡絮黏附机理分析表明，CCDAF工艺逆向流碰撞区主导作用机制为碰撞黏附及共聚作用，同向流接触区为碰撞黏附及网捕、包卷和架桥作用。

关键词: 混凝, 浮选, CCDAF, 吸附, 泡絮碰撞黏附, 溶气气浮

Abstract:

Conventional dissolved air flotation(DAF) has the problems of low efficiency for microbubble meshing and particle adhesion, and unstability of the adhesion between microbubbles and particles. In this work, a novel countercurrent-cocurrent dissolved air flotation(CCDAF) was developed, of which the contact room was consisted of collision and adhesion contact room, and each room was introduced dissolved air water. The results showed that the CCDAF significantly enhanced the adhesion efficiency of microbubbles-floc. The average removal efficiency of turbidity and algae were 96.4% and 96.50%, respectively. The diameter of particles for effluent was mainly ranged in 2-7 μm. Most of the removed substance was macromolecules and hydrophobic organic compounds. COD_Mn, UV₂₅₄, DOC had achieved 37.6%, 46.3% and 32.11%, respectively, indicating the significantly higher removal efficiency of CCDAF than the traditional DAF. The analysis of the removal mechanism between microbubbles and particles showed that the collision, adhesion and copolymerization in countercurrent room and collision, adhesion, wrapped, meshing and adsorption-bridging in cocurrent-contact room were probably the reasons to enhance the removal efficiency of this CCDAF.

Key words: coagulation, flotation, CCDAF, adsorption, microbubbles-floc collision and adhesion, DAF process

中图分类号:

TU991

王永磊, 刘宝震, 张克峰, 李梅, 贾瑞宝, 宋武昌, 李军. 逆向-同向流气浮工艺构建与运行特性[J]. 化工学报, 2016, 67(12): 5252-5258.

WANG Yonglei, LIU Baozhen, ZHANG Kefeng, LI Mei, JIA Ruibao, SONG Wuchang, LI Jun. Construction and operation characteristics of countercurrent-cocurrent dissolved air flotation[J]. CIESC Journal, 2016, 67(12): 5252-5258.

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逆向-同向流气浮工艺构建与运行特性

Construction and operation characteristics of countercurrent-cocurrent dissolved air flotation

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