添加复合酶对污泥生物干化有机质降解及产热的影响研究
Effect of multi-enzyme on organic matter degradation and heat production in sewage sludge biodrying
陈颖 1王新雨 1徐秀丽 2蔡璐 1郑国砥 3王侃1
作者信息
- 1. 宁波大学 土木工程与地理环境学院,浙江 宁波 315211
- 2. 浙江省宁波生态环境监测中心,浙江 宁波 315012
- 3. 中国科学院 地理科学与资源研究所,北京 100101;中国科学院大学 资源与环境学院,北京 100049
- 折叠
摘要
通过添加复合酶研究其对污泥生物干化有机质降解及产热的影响.以脱水污泥、餐厨垃圾为原料,以锯末、无机调理剂为辅料进行生物干化实验,设置空白对照组(T1)和实验组(T2),实验组添加由中性蛋白酶、α-淀粉酶、溶菌酶按比例混合的复合酶,分析生物干化过程中堆体基本指标、有机质降解与产热的关系,探究不同阶段发酵产热的动态规律,并进行数值模拟.结果表明,T1组水分去除率为16.70%,有机质降解率为9.55%,总产热量为1096.97 kJ∙kg-1;T2组水分去除率为23.61%,有机质降解率为10.98%,总产热量为1520.78 kJ∙kg-1.三维荧光光谱分析结果表明,两组堆体中芳香蛋白类物质和可溶性微生物副产物被有效降解,腐殖酸类化合物被明显合成,表明添加复合酶能够有效促进有机质降解、提高产热,有利于污泥干化效率的提高.
Abstract
Enzymes play an important role in the catalytic degradation of organic matter during sewage sludge biodrying.To improve the efficiency of biodrying by exogenous enzymes,this experiment investigated the effect of adding compound enzymes on the degradation of organic matter and heat production of sewage sludge biodrying.The biodrying experiment was carried out with dewatered sludge and kitchen waste as raw materials,sawdust and inorganic amendment as auxiliary materials.There was a control group(T1)and experimental group(T2).The experimental group added the compound enzyme composed of neutral protease,α-amylase and lysozyme mixed in proportion.The basic indexes of the pile and the relationship between organic matter degradation and heat production in the biodrying process were analyzed.The dynamic law of heat production in fermentation at different stages was explored and numerically simulated to provide theoretical parameters for the intelligent control of biodrying.The results showed that the water removal rate of group T1 was 16.70%,the organic matter degradation rate was 9.55%,and the total heat production was 1 096.97 kJ∙kg-1.In group T2,the water removal rate was 23.61%,the organic matter degradation rate was 10.98%,and the total heat production was 1 520.78 kJ∙kg-1.Three-dimensional fluorescence spectrum analysis showed that the aromatic protein-like compounds and soluble microbial byproduct-like substances in the two groups were effectively degraded,and the humic acid-like compounds were obviously synthesized.Therefore,the addition of compound enzymes can effectively promote the degradation of organic matter and improve heat production,which is conducive to further improving the efficiency of sewage sludge drying.
关键词
污泥/生物干化/产热/热值/有机质Key words
sewage sludge/biodrying/heat production/heating value/organic matter引用本文复制引用
出版年
2024
NETL
NSTL
万方数据