化工学报2016，Vol.67Issue(12)：5252-5258,7.DOI:10.11949/j.issn.0438-1157.20160917
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
摘要
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—7μm. Most of the removed substance was macromolecules and hydrophobic organic compounds. CODMn, 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.关键词
混凝/浮选/CCDAF/吸附/泡絮碰撞黏附/溶气气浮Key words
coagulation/flotation/CCDAF/adsorption/microbubbles-floc collision and adhesion/DAF process分类
建筑与水利引用本文复制引用
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):5252-5258,7.基金项目
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）。@@@@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) （2014GSF120003）
