为了研究单过硫酸氢钾复合盐（ PMS）对剩余污泥厌氧发酵的影响，将不同剂量的PMS投加至剩余污泥厌氧发酵系统中，分析污泥溶液化率、污泥分解率、可挥发性脂肪酸（ SCFAs）、蛋白质和多糖、水解酶、发酵污泥毛细吸水时间（ CST）及可挥发性悬浮固体浓度（ MVLSS）等指标．研究发现，在污泥中投入适量的PMS能够有效地促进污泥水解酸化，提高污泥减量率．结果表明，当PMS为0．04～0．08 mg／mg时污泥发酵性能最佳，水解酸化性能相近．当PMS大于0．08 mg／mg时，污泥发酵性能下降，且该条件下药剂消耗成本较高，不利于发酵系统运行．研究同时发现，PMS能够显著提高SCFAs中乙酸的比例，乙酸比例最高可达到75．55％，同时降低丙酸比例，丙酸比例最低可达到0．92％．%In order to investigate the effect of potassium peroxymonosulfate ( PMS) on the waste ac-tivated sludge ( WAS) anaerobic fermentation, the PMS of different dose was added into the fermen-tation systems.Different indicators, such as the WAS solubilization rate, disintegration degree rate, short chain fatty acids(SCFAs), protein, polysaccharide, hydrolase, capillary suction time(CST) of WAS and volatile suspended solid ( MLVSS) concentration were analyzed in the anaerobic fer-mentation process.It is found that the appropriate PMS effectively enhances the WAS hydrolysis a-cidification function and sludge reduction.The results show that when the PMS is 0.04 to 0.08 mg/mg, the fermentation performance of WAS is the best and they have a similar hydrolytic acidifi-cation performance.However, the fermentation performance of WAS is reduced and the reagent cost is increased when the PMS is higher than 0.08 mg/mg.It is not beneficial to the fermentation sys-tem operation.At the same time, it is found that the PMS can significantly increase the proportion of acetic acid to the maximum of 75.55%, and decline the proportion of propionic acid to the minimum of 0.92%in SCFAs.
展开▼
