LIU Hui1,2,SUN Yanfu1, ZHOU Kangqun1,LI Jun2,CHEN Jiemei1,MAI Zhihong1,LI Yan2" />
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LIU Hui1,2,SUN Yanfu1, ZHOU Kangqun1,LI Jun2,CHEN Jiemei1,MAI Zhihong1,LI Yan2
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刘晖1,2,孙彦富1,周康群1,李军2,陈捷美1,麦志宏1,李研2
Abstract:
The A/A sequencing batch reactor(SBR)was used to enrich denitrifying and phosphorus accumulating bacteria(DPB).Denitrifying and phosphorus accumulating tests were performed by using acetic acid and glucose as substrate.The metabolic mechanism and change of phosphorus/nitrate/COD in water and polyhydroxyalkanoates(PHA)/glycogen in sludge were studied.The release of poly-phosphate would control the combination of PHA.At the anoxic stage breakdown of PHA was used as carbon source to denitrify nitrate, and the adenosine triphosphate(ATP)thus generated provided energy for accumulating phosphorus.So it is important to track the change of PHA, not COD when the denitrifying and phosphorus accumulating process was studied.When glucose was used as substrate, fermented bacteria broke down glucose into volatile organic acid of small molecules, then non-fermented bacteria could play a role fully.At the anaerobic stage, 85% energy came from the release of phosphorus, 15% energy came from the fermentation of glycogen.At the anoxic stage, 85% PHA breakdown was used to accumulate phosphorus, 15% was converted into glycogen.The metabolic mechanism could be simplified.
摘要:
利用A/ASBR富集反硝化聚磷菌,并利用乙酸和葡萄糖两种基质进行反硝化聚磷实验,跟踪实验过程水中的磷酸盐、硝酸盐、COD与泥中PHA和糖原的变化,研究代谢途径。结果表明:(1)厌氧时磷酸盐的释放将决定PHA的合成,缺氧时PHA的分解一方面作为碳源将NO-3-N还原成了N2,同时产生的ATP为聚磷过程提供能量,因此在研究反硝化聚磷效果时,应重点跟踪ΔPHA,而不是ΔCOD。(2)以葡萄糖为基质时只有先通过发酵型的菌将葡萄糖分解为小分子的挥发性有机酸,才能充分发挥非发酵菌的反硝化聚磷功能。(
LIU Hui1,2,SUN Yanfu1, ZHOU Kangqun1,LI Jun2,CHEN Jiemei1,MAI Zhihong1,LI Yan2. Substrate utilization and metabolic mechanism of denitrifying phosphorus accumulating sludge[J]. .
刘晖1,2,孙彦富1,周康群1,李军2,陈捷美1,麦志宏1,李研2. 反硝化聚磷污泥的基质利用及代谢途径 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2011/V62/I9/2623