淀粉酶、蛋白酶对促进厌氧污泥水解的研究

发布时间：2018-02-03 05:49

本文关键词： 厌氧污泥水解蛋白酶淀粉酶　出处：《给水排水》2017年S1期 　论文类型：期刊论文

【摘要】：水解酶可以提高污泥的水解效率,主要是通过提高胞外过程(溶性颗粒物质在胞外水解酶的作用下水解为可溶性单体)的速率来加快有机物的降解速率。大分子蛋白质在蛋白酶的催化作用下最终水解生成氨等低分子物质。碳水化合物在淀粉酶的作用下水解为小分子的多糖甚至单糖。本文主要通过研究蛋白酶和淀粉酶在厌氧污泥水解过程中对SCOD/TCOD、还原性糖、NH3-N指标的处理贡献值,探讨外加水解酶对厌氧污泥水解的促进作用。当投加0.3g/L淀粉酶,反应时间为60h,SCOD/TCOD处理效率最高;投加0.6g/L淀粉酶,反应时间为12h,还原性糖的处理效率最高;投加0.3g/L蛋白酶,反应时间为24h,NH3-N的相对提高值最大。并发现,当试验进行到后期时,碳水化合物的水解性能整体有所降低。淀粉酶在某一阶段,可与嗜热菌合作,水解一定量的蛋白质。
[Abstract]:Hydrolase can improve the hydrolysis efficiency of sludge. Mainly by improving the extracellular process (soluble particles hydrolyzed into soluble monomers under the action of extracellular hydrolase). In order to accelerate the degradation rate of organic matter, macromolecular proteins are hydrolyzed under the catalysis of protease to produce low molecular substances such as ammonia. Carbohydrates are hydrolyzed into small molecular polysaccharides or even monomers under the action of amylase. Sugar. In this paper, protease and amylase were used to hydrolyze SCOD/TCOD in anaerobic sludge. The contribution of NH _ 3-N to the treatment of reducing sugar was studied, and the effect of added hydrolase on the hydrolysis of anaerobic sludge was discussed. The reaction time was 60 h when 0.3 g / L amylase was added. The efficiency of SCOD/TCOD treatment was the highest. When 0.6 g / L amylase was added, the treatment efficiency of reducing sugar was the highest when the reaction time was 12 h. Adding 0.3 g / L protease, the reaction time was 24 h and NH3-N increased the most, and it was found that when the experiment was carried out to the later stage. The hydrolysis performance of carbohydrates has been reduced. Amylase can cooperate with thermophilic bacteria to hydrolyze a certain amount of protein at a certain stage.
【作者单位】：大连海事大学;
【分类号】：X703
【正文快照】： 0　前言1　材料与方法污水处理过程伴随着大量剩余污泥的产生。按万t废水产1.1　污泥、生物酶来源及性质生2.7t(干质量)污泥计算[1],全国2014年产生污泥847万t(干试验所使用的污泥来自大连东泰夏家河子污泥处理厂,污质量)[2],若折合含水80%,则污泥为4　233万t,由此可看出,污泥

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