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扬水曝气器类型对分层水库藻类控制效果的影响

孙 昕 张梦丹 黄廷林 刘 伟 马卫星

孙 昕, 张梦丹, 黄廷林, 刘 伟, 马卫星. 扬水曝气器类型对分层水库藻类控制效果的影响[J]. 环境科学研究, 2014, 27(12): 1479-1485.
引用本文: 孙 昕, 张梦丹, 黄廷林, 刘 伟, 马卫星. 扬水曝气器类型对分层水库藻类控制效果的影响[J]. 环境科学研究, 2014, 27(12): 1479-1485.
SUN Xin, ZHANG Meng-dan, HUANG Ting-lin, LIU Wei, MA Wei-xing. Comparison of Water-Lifting Aerator Type for Algae Inhibition in Stratified Reservoirs[J]. Research of Environmental Sciences, 2014, 27(12): 1479-1485.
Citation: SUN Xin, ZHANG Meng-dan, HUANG Ting-lin, LIU Wei, MA Wei-xing. Comparison of Water-Lifting Aerator Type for Algae Inhibition in Stratified Reservoirs[J]. Research of Environmental Sciences, 2014, 27(12): 1479-1485.

扬水曝气器类型对分层水库藻类控制效果的影响

基金项目: 国家科技支撑计划项目(2012BAC04B02);陕西省科学技术社发攻关项目(2010K11-02-03);教育部高等学校博士点专项科研基金项目(20106120120012)

Comparison of Water-Lifting Aerator Type for Algae Inhibition in Stratified Reservoirs

  • 摘要: 为优选扬水曝气器的类型以更经济有效地原位控藻,建立了基于Fluent软件的水库水动力与水质数值模拟方法,在不同温度梯度和水深条件下,预测了淹没式和非淹没式扬水曝气器对分层水库中藻类控制的效果. 以金盆水库扬水曝气水质改善工程为案例,对扬水曝气器外围流场和藻类混合迁移过程进行数值模拟. 结果显示,垂向流速和藻密度的模拟结果与实测数据吻合较好. 在典型的扬水曝气器运行条件下,水深分别为77.25、87.25和97.25 m时,淹没式和非淹没式扬水曝气器的外围流场均以顺时针环流为特征;淹没式扬水曝气器的环流发展较远,表层藻密度分别被削减了86.8%、88.2%、90.6%;扬水曝气器类型对藻密度削减率的影响不大. 采用淹没式扬水曝气器时,77.25、87.25和97.25 m水深下核心控藻区占整个流场区域的比例分别为39.71%、41.14%和42.73%,分别比非淹没式的高14.81%、8.95%和2.69%;藻类完全混合的时间分别为10、12和14 d,分别比非淹没式的少8、7和6 d. 不同季节和水深条件下的模拟结果表明,采用淹没式扬水曝气器,核心控藻区域较大,藻类混合较快.

     

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出版历程
  • 收稿日期:  2014-02-27
  • 修回日期:  2014-08-01
  • 刊出日期:  2014-12-25

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