基于不同基质的强化生物除磷系统中生化反应机理研究进展

Research progress in biochemical reaction mechanism for enhanced biological phosphorus removal using different carbon sources

阐述了3种不同基质(乙酸盐、丙酸盐和葡萄糖)在强化生物除磷系统中的生化模型反应机理。重点介绍了聚磷菌(PAOs)、聚糖菌(GAOs)和产乳酸菌在厌氧/好氧条件下对能量及还原力(NADH2)的利用方式;聚-β-羟基链烷酸盐(PHA)的合成方式及存在形式,糖原、乳酸(L型)的代谢途径等。虽然控制基质条件可以实现稳定的强化生物除磷效果,但目前的生化模型并不能完全解释所有的代谢过程,今后要在分离纯种的PAOs及相关生化代谢过程中酶的活动等方面进行深入研究。

The mechanisms of biochemical reactions involved in the enhanced biological phosphorus removal （EBPR）, using three different substrates （acetate, propionate and glucose） as the carbon source, were presented fo cusing on： the energy and reducing power of phosphate accumulating organisms （PAOs）, glycogen accumulating or ganisms （GAOs） and latic acid producing organisms （LPOs） under anaerobic and aerobic conditions, formation and composition of PHA, metabolic pathways of glycogen and lactic acid （L-type）. Although stable and good EBPR performance may result by proper control of the substrate conditions, the present metabolism models can not represent all biochemical processes equally as well. Further research in pure culture of PAOs and relative activity of enzyme in the biochemical metabolism were recommended.