典型污染物对微气泡曝气中氧传质特性的影响
作者:
作者单位:

(1.中国人民解放军理工大学工程兵工程学院,江苏南京 210007;2.河北科技大学环境科学与工程学院,河北石家庄 050018;3.天津科技大学海洋科学与工程学院,天津 300457)

作者简介:

吕 越(1975-),男,河北石家庄人,工程师,硕士研究生,主要从事水环境治理方面的研究

通讯作者:

中图分类号:

基金项目:

河北省应用基础研究计划重点基础研究项目(11966726D)


Effect of typical contaminants on oxygen transfer in microbubble aeration
Author:
Affiliation:

(1.Engineering Institute of Engineering Corps, PLA University of Science and Technology, Nanjing Jiangsu 210007, China;2.College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang Hebei 050018, China;3.College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China)

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    微气泡曝气是一种新型的曝气方式,废水中的污染物对微气泡曝气中氧传质过程具有显著影响。采用气-水旋流微气泡发生装置进行空气微气泡曝气,考察了微气泡曝气中表面活性剂、油脂、苯酚、硝基苯、悬浮固体(高岭土)等典型污染物对氧传质的影响。结果表明,微气泡曝气和传统气泡曝气的表观状态具有明显差异,呈现乳浊状态。表面活性剂、豆油、苯酚、硝基苯等污染物均有助于微气泡的产生和稳定性,从而提高微气泡曝气的气含率和气泡平均停留时间。同时,这些污染物存在时,微气泡曝气氧传质系数为7.44~11.56h-1,α因子为0.77~1.20,显著高于传统气泡曝气。污染物对微气泡的形成和稳定性具有积极作用,可以克服其对氧传质过程的负面效应。气含率和污染物种类是影响微气泡曝气氧传质过程的重要因素。

    Abstract:

    Microbubble aeration is a new type of bubble aeration, and contaminants in waste water has great influence on oxygen transfer in microbubble aeration. The effects of different typical contaminants on oxygen transfer in microbubble aeration were investigated by using a gas-water circulation type microbubble generator, including surfactants, soybean oil, phenol and nitrobenzene as well as suspended solid (kaolin). The results indicate that different from traditional bubble aeration, microbubble aeration seems like milk-turbid due to very small bubble size. The soluble organic contaminants improve generation and stability of microbubbles, resulting in higher gas holdup and gas retention time. The range of oxygen transfer coefficient KLa is 7.44~11.56h-1, and the range of α-factors is 0.77~1.20in microbubble aeration with the typical contaminants under all test conditions, larger than those in traditional bubble aeration. The improvement of microbubble generation and stability in presence of the contaminants should be responsible for the reduction of negative effect of contaminants on oxygen transfer. The gas hold-up and contaminant type are the important influencing factors for oxygen transfer in microbubble aeration.

    参考文献
    相似文献
    引证文献
引用本文

吕 越,刘 春,杨 枭,吴克宏.典型污染物对微气泡曝气中氧传质特性的影响[J].河北科技大学学报,2012,33(5):469-474

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2012-05-16
  • 最后修改日期:2012-09-06
  • 录用日期:
  • 在线发布日期: 2013-08-29
  • 出版日期: