硫酸盐还原产物对EBPR系统影响的研究进展

Research Review on the Effects of Sulfate Reduction Products on Enhanced Biological Phosphorus Removal System

温暖沿海地区的污水中含有大量硫酸盐,而其在厌氧条件下的还原产物--硫化物及聚硫颗粒(polymeric sulfur compound, poly-S)会对强化生物除磷(enhanced biological phosphorus removal, EBPR)过程产生重要影响.综述了硫化物对传统强化生物除磷(conventional enhanced biological phosphorus removal, CEBPR)系统营养物去除、沉降性能和聚磷菌(polyphosphate accumulating organisms, PAO)的影响及作用机理,硫循环协同强化生物除磷(sulfur cycle-associated enhanced biological phosphorus removal, S-EBPR)系统的创建及特征(主要包括其生物转化过程、优势功能菌及除磷效果的影响因素),以及poly-S在S-EBPR系统中的功能作用.发现了硫化物和poly-S在硫循环参与的生物除磷过程中发挥着重要的积极作用,并且通过适当调控,或许能实现生物除磷系统对低ρ(C)/ρ(P)且含硫废水处理效果的强化;提出了当前研究存在的不足以及未来的研究方向,以期为EBPR系统的稳定高效运行及低ρ(C)/ρ(P)含硫污水的处理提供理论基础.

Due to the anthropogenic activities,such as industrial wastewater discharge and the direct use of sea and brackish water as secondary quality water,sewage with sulfate concentrations around 50-500 mg/L can be formed.Sulfide and polymeric sulfur compound(poly-S),as the main reduction products of sulfate under anaerobic conditions,have important effects on enhanced biological phosphorus removal(EBPR)system.This work aims to review the effects and act mechanisms of sulfide on the conventional enhanced biological phosphorus removal(CEBPR)process,the creation and characteristics of the sulfur cycle-associated enhanced biological phosphorus removal(S-EBPR)system,and the functions of poly-S in S-EBPR system.It is found that,sulfur compounds and poly-S are important for the biological phosphorus removal process with the synergistic participation of sulfur cycle,and proper regulation of operating conditions may further enhance the performance of EBPR for treating the sulfur-containing wastewater.The shortcomings of the current researches and the research directions in the future are also put forward.It is intended to provide theoretical foundations for securing satisfactory EBPR performance and the treatment of low ρ(C) / ρ(P) ratio and sulfur-containing wastewater.