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OALib Journal期刊
ISSN: 2333-9721
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聚糖菌颗粒污泥的反硝化特性与微生物群落分布
DOI: 10.3724/SP.J.1145.2013.12047, PP. 551-557
Keywords: 聚糖菌,反硝化,颗粒污泥,微生物群落动态,生物脱氮,气态产物,四联球菌
Abstract:
为了解聚糖菌在污泥颗粒化中的脱氮能力及其微生物生态特性，采用反应器工艺、批式试验、显微技术和荧光原位杂交技术来评估其反硝化能力，揭示其微生物群落的微观结构，探索聚糖菌和聚磷菌在不同粒径污泥中的分布特征.结果表明，污泥对有机物的吸收率稳定在90%以上.颗粒污泥的沉降指数（svi10）稳定在30-50mlg-1，远低于接种污泥的108.2mlg-1.聚醣菌颗粒污泥对硝酸盐氮和亚硝酸盐氮的反硝化去除率分别达到了65%和70%，氮气为主要气态产物.聚糖菌颗粒污泥被大量的四联球菌结构所充斥，丝状菌在其中起到了重要的构架和搭桥的作用.荧光原位杂交结果表明聚糖菌可生存于各尺寸颗粒化污泥内；而聚磷菌受到严重抑制只能较少地分布在颗粒污泥的外围空间.上述结果表明，在sbr反应器中采用厌氧搅拌―排水―好氧曝气的处理模式成功培育出具有聚糖特性的颗粒化微生物聚集体，培育成功的颗粒污泥对硝酸盐氮和亚硝酸盐氮均具有良好的反硝化特性.在整体颗粒污泥微生物群落中聚糖菌为优势种群.图8表1参19
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