| 聚糖菌颗粒污泥基于胞内储存物质的同步硝化反硝化 |
| 摘要点击 1710 全文点击 1221 投稿时间：2005-04-23 修订日期：2005-07-11 |
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| 中文关键词 聚糖菌 反硝化聚糖菌 好氧颗粒污泥 胞内储存物质 同步硝化反硝化 |
| 英文关键词 glycogen accumulating organisms(GAOs) denitrifying glycogen accumulating organisms(DGAOs) aerobic granular sludge intracellular storage polymer simultaneous nitrification and denitrification(SND) |
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| 中文摘要 |
| 采用特殊运行方式的厌氧-好氧SBR系统(厌氧后排水),以乙酸钠为有机基质成功富集了聚糖菌颗粒污泥.聚糖菌颗粒污泥厌氧-好氧批式实验表明,聚糖菌颗粒污泥具有较强的SND能力,TOC/N分别为5.0,4.0,2.8时,SND效率分别96.4%、95.3%及96.2%,而周期总氮去除效率随着碳氮比降低而降低,分别为66.0%、61.2%及56.3%.通过对周期氨氮、亚硝酸盐氮、硝酸盐氮、TOC以及胞内糖原、PHB变化的测定分析,证明聚糖菌颗粒污泥SND过程中,污泥以厌氧阶段储存于胞内的多聚物PHB作为反硝化碳源,并且反硝化聚糖菌是系统中反硝化能力的来源.与溶解性基质相比,PHB的降解速率相对较低,因此在SND过程中,反硝化可以与硝化保持相近的速率,从而有助于获得良好的SND效果. |
| 英文摘要 |
| Glycogen accumulating organisms(GAOs) granular sludge was cultivated and stably existed in a sequencing batch reactor(SBR),fed with acetate as organic substrate,by means of special alternating anaerobic-aerobic operation mode, i.e.withdrawal after anaerobic period and sludge aeration during aerobic period to suppress the activity of phosphate accumulating organisms(PAOs).Anaerobicaerobic batch tests of GAOs granular sludge were carried out to investigate its simultaneous nitrification and denitrification(SND) performances under different TOC/N.The results showed GAOs granular sludge had high SND activity,SND efficiencies were 96.4%,95.3% and 96.2% respectively as TOC/N were 5.0,4.0 and 2.8,and the total nitrogen removal efficiencies,decreased with TOC/N decreased,were 66.0%,61.2% and 56.3% respectively.Measuring and analyzing the variation of ammonia,nitrite,nitrate,TOC,intracellular glycogen and PHB in batch tests,it was verified that intracellular PHB was used as carbon source of denitrification and denitrifying glycogen accumulating organisms(DGAOs) were responsible organisms for the denitrification activity.The degradation rate of PHB was slower than that of soluble substrate and therefore throughout the aerobic period the separate proceses of nitrification and denitrification can proceed at similar rates,which was help to improve SND efficiency. |
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