污泥厌氧发酵产酸的研究进展及应用

Research Progress of Acid Production from Anaerobic Fermentation of Sludge and Its Application

随着人们用水量的增加,污泥量也急剧上升,为了实现污泥的减量化,厌氧发酵技术成为了目前广泛使用的方法.作为厌氧消化的中间产物,挥发性脂肪酸(VFAs)可以作为碳源用于污水脱氮除磷、合成生物塑料以及生产生物能源,也可以作为电子受体用于合成中链脂肪酸.本文介绍了污泥厌氧发酵产酸的机理,重点梳理了厌氧发酵产酸的影响因素(pH、温度、碳氮比)、污泥预处理技术(物理法、化学法、生物法)以及VFAs的应用前景,并对污泥厌氧发酵产酸未来的研究方向进行探讨.

The sludge production rises sharply with the increase of water consumption.In order to achieve the reduction of sludge,anaerobic fermentation technology has been widely used.As intermediate products of anaerobic digestion,volatile fatty acids(VFAs)can be used not only as a carbon source for nitrogen and phosphorus removal from sewage,synthesis of bioplastic and bioenergy production,but also as an electron acceptor for the synthesis of medium-chain fatty acids.In this article we first briefly introduce the mechanism of acid production from anaerobic fermentation of sludge,then mainly review the influencing factors of acid production from anaerobic fermentation(pH value,temperature,C/N ratio,pretreatment technology)and the application prospects of VFAs,and finally discuss future directions in the study of acid production from anaerobic fermentation.