内源淀粉酶对污泥性质及厌氧消化性能的影响  

Effect of endogenous amylase on characterization and anaerobic digestibility of sludge

作　　者：于淑玉[1] 张光明[1] 赵志伟[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2013年第4期48-52,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50908061)

摘　　要：为了研究污泥自身产生的淀粉酶对污泥性质的影响,将污泥中的淀粉酶产生菌(WYDF、WYZZ)发酵培养,再将培养液投加到污泥中,并测定了污泥的生物化学甲烷势(BMP),考察了淀粉酶对污泥厌氧消化性能的影响.结果表明,淀粉酶能够促进污泥的水解酸化过程,与未处理污泥相比,WYDF处理后挥发酸(VFA)最大质量浓度提高了56%.淀粉酶对污泥的溶解作用是有限的,处理后最高仅溶出污泥总化学需氧量(TCOD)中6%的有机物.用两菌株酶液联合处理后(WYDF+WYZZ),粒径在200～2 000μm之间的污泥明显减少.同时污泥厌氧消化性能得到较大提高.挥发性固体(VS)去除率从对照组的36.02%提高到42.19%;污泥的VS甲烷产率从对照组的381 mL/g提高到434 mL/g.Two bacterial fermentation products containing amylase were added： singly or combinationally to waste activated sludge （WAS）. Biochemical methane potential （BMP） experiment of enzyme treated sludge was carried out to investigate the effects of amylase, which could be released by WAS, on the digestibility of sludge. The results show that enzymatic pretreatment can facilitate the hydrolyzation of macromolecule organic matters into small molecular organics, with a 56% increase in volatile fat acids. For treated sludge, the volume occupied by particle between 200 ~ 2 000 ttm decreased obviously. Although the hydrolyzability of sludge is low, the digestibility of pretreated sludge was remarkably improved. The reduction of volatile was enhanced from 36. 02% to 42. 19%. The specific methane yield was 434 mL CH4 per gram volatile solid removed, which was higher than that of untreated sludge （381 mL/g）.

关 键 词：淀粉酶 活性污泥 生物化学甲烷势 厌氧消化 

分 类 号：X703[环境科学与工程—环境工程]