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生化池中不同粒径细微沙的悬浮特性

吉芳英 范剑平 王颖 许晓毅 徐璇 李东平 孙国胜

吉芳英, 范剑平, 王颖, 许晓毅, 徐璇, 李东平, 孙国胜. 生化池中不同粒径细微沙的悬浮特性[J]. 环境科学研究, 2016, 29(2): 234-239.
引用本文: 吉芳英, 范剑平, 王颖, 许晓毅, 徐璇, 李东平, 孙国胜. 生化池中不同粒径细微沙的悬浮特性[J]. 环境科学研究, 2016, 29(2): 234-239.
JI Fangying, FAN Jianping, WANG Ying, XU Xiaoyi, XU Xuan, LI Dongping, SUN Guosheng. Suspension Properties of Fine Grit with Different Particle Sizes in Bioreactors[J]. Research of Environmental Sciences, 2016, 29(2): 234-239.
Citation: JI Fangying, FAN Jianping, WANG Ying, XU Xiaoyi, XU Xuan, LI Dongping, SUN Guosheng. Suspension Properties of Fine Grit with Different Particle Sizes in Bioreactors[J]. Research of Environmental Sciences, 2016, 29(2): 234-239.

生化池中不同粒径细微沙的悬浮特性

基金项目: 国家水体污染控制与治理科技重大专项(2013ZX07314-001-002);高等学校学科创新引智计划资助项目(B13041)

Suspension Properties of Fine Grit with Different Particle Sizes in Bioreactors

  • 摘要: 进入生化池的沙粒受粒径影响,或沉积或悬浮在生化池,粒径≤73 μm的细微沙容易悬浮在污泥混合液中,导致活性污泥ρ(MLVSS)/ρ(MLSS)(生物有机质所占的比例)下降. 以粒径≤73 μm的沙粒为对象,研究生化池中不同粒径细微沙对活性污泥ρ(MLVSS)/ρ(MLSS)的影响,探讨细微沙的可悬浮性和悬浮态势,揭示细微沙对污泥活性的影响,以期为污水厂的运行管理提供理论基础. 通过显微观察发现,粒径>33 μm的细微沙不易被活性污泥卷捕,呈自由悬浮态势;粒径≤33 μm的细微沙容易被活性污泥絮体卷捕,呈卷捕附着态势. 细微沙粒径越小,悬浮比(悬浮在污泥混合液中的细微沙占生化池进水中细微沙总量的比例)越大,活性污泥ρ(MLVSS)/ρ(MLSS)越低,悬浮比与细微沙粒径呈显著线性相关(y=0.996-0.010x),活性污泥ρ(MLVSS)/ρ(MLSS)与悬浮比相关性显著〔y=2.84/(12.27x+3.06)〕. 研究显示,细微沙不影响污泥中微生物的活性,污水厂可结合活性污泥ρ(MLVSS)/ρ(MLSS)调控ρ(MLSS),保证ρ(MLVSS)的稳定,有利于实现污水处理系统的稳定运行.

     

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出版历程
  • 收稿日期:  2015-08-30
  • 修回日期:  2015-10-26
  • 刊出日期:  2016-02-25

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