化工学报2011，Vol.62Issue(9)：2623-2628,6.DOI:10.3969/j.issn.0438-1157.2011.09.035
反硝化聚磷污泥的基质利用及代谢途径
Substrate utilization and metabolic mechanism of denitrifying phosphorus accumulating sludge
摘要
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.关键词
反硝化聚磷/代谢途径/基质利用/PHA/非发酵菌Key words
denitrifying phosphorus accumulating process/ metabolic mechanism/ substrate utilization/ PHA/ non-fermented bacteria分类
资源环境引用本文复制引用
刘晖,孙彦富,周康群,李军,陈捷美,麦志宏,李研..反硝化聚磷污泥的基质利用及代谢途径[J].化工学报,2011,62(9):2623-2628,6.基金项目
国家自然科学基金项目(51078008) （51078008）
广东自然科学基金项目(06022869,07003251) （06022869,07003251）
广东省教育厅项目(LYM08067). （LYM08067）
