优化曝气速率以最小化膜污染及其对移动床膜生物反应器中污泥特性的影响。
Optimizing aeration rates for minimizing membrane fouling and its effect on sludge characteristics in a moving bed membrane bioreactor.
机构信息
Department of Civil & Environmental Engineering, Graduate Faculty of Environment, University of Tehran, No. 25 Qods St., Enghelab Ave., Tehran, Iran.
出版信息
J Hazard Mater. 2011 Feb 28;186(2-3):1097-102. doi: 10.1016/j.jhazmat.2010.11.117. Epub 2010 Dec 4.
In MBR processes, sufficient aeration is necessary to maintain sustainable flux and to retard membrane fouling. Membrane permeability, sludge characteristics, nutrient removal and biomass growth at various air flow rates in the membrane and moving bed biofilm reactor (MBBR) compartments were studied in a pilot plant. The highest nitrogen and phosphorous removal rates were found at MBBR aeration rates of 151 and 85 L h(-1) and a specific aeration demand per membrane area (SAD(m)) of 1.2 and 0.4 m(air)(3) m(-2) h(-1), respectively. A linear correlation was found between the amount of attached biofilm and the nutrient removal rate. The aeration rate in the MBBR compartment and SAD(m) significantly influenced the sludge characteristics and membrane permeability. The optimum combination of the aeration rate in the MBBR compartment and SAD(m) were 151 L h(-1) and 0.8-1.2 m(air)(3) m(membrane)(-2) h(-1), respectively.
在 MBR 工艺中，需要充足的曝气来维持可持续的通量并延缓膜污染。在中试规模的膜生物反应器（MBBR）和移动床生物膜反应器（MBBR）中，研究了不同曝气流速下的膜透过率、污泥特性、营养物质去除率和生物量生长情况。在 MBBR 曝气率为 151 L/h 和 85 L/h，以及单位膜面积的特定曝气需求（SAD(m)）为 1.2 m³/（m²·h）和 0.4 m³/（m²·h）时，氮和磷的去除率最高。附着生物膜的量与营养物质去除率之间存在线性相关性。MBBR 区的曝气率和 SAD(m) 显著影响污泥特性和膜透过率。MBBR 区的曝气率和 SAD(m) 的最佳组合分别为 151 L/h 和 0.8-1.2 m³/（m²·膜·h）。
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