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OALib Journal期刊
ISSN: 2333-9721
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好氧颗粒污泥耐受高碳氮负荷过程中的群体感应
DOI: 10.3724/SP.J.1145.2014.00073, PP. 73-79
Keywords: 好氧颗粒污泥,高碳氮负荷,群体感应,ai-2,种间交流
Abstract:
为了探究好氧颗粒污泥耐受高负荷碳氮的生物学机制，对比分析了不同负荷条件下好氧颗粒对污染物的去除、形体结构和群体感应现象.结果表明，好氧颗粒污泥具有同时耐受高碳氮负荷的能力，当进水cod负荷为12.9kgm-3d-1时去除率为90%以上，nh4+-n负荷为0.455kgm-3d-1时去除率在80%以上.随着负荷的提高，颗粒的粒径不断减小，这可能增强颗粒的传质传氧作用.在进水负荷cod8.9-10.9kgm-3d-1、nh4+-n0.355-0.455kgm-3d-1时，ai-2活性较强，微生物之间相互交流比较活跃，并且保持较好的cod和nh4+-n去除效果.好氧颗粒污泥内部的ai-2活性高于出水溶液.研究表明，群体感应可能在好氧颗粒污泥同时耐受高碳氮负荷中发挥着重要的作用.
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