污泥热水解过程中固体有机物的变化规律  

Transformation Regularity of Organic Solids in Sludge Thermal Hydrolysis Process

作　　者：王治军[1] 王伟[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《中国给水排水》2004年第7期1-5,共5页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2002AA644010)

摘　　要：　开展污泥热水解的基础研究可促使该技术在工程上尽快地得到应用,为此取北京某污水处理厂污泥储罐中的污泥进行热水解试验。结果表明,固体有机物经历了溶解和水解两个过程,溶解过程符合一级反应动力学模型,溶解速度常数与温度的关系符合Arrhenius方程;有机物水解生成挥发性脂肪酸(VFA),VFA占溶解性COD(SCOD)的30%～40%,其中乙酸占VFA的55%以上,该比例随热水解温度的升高而增大。Test was carried out for thermal hydrolysis of sewage sludge from a wastewater treatment plant in Beijing,the result shows that in the thermal hydrolysis of sludge,organic solids undergo dissolving and hydrolyzing processes;the dissolving process accords with first-order reaction dynamic model,and the relation between dissolving rate constant and temperature can be depicted by Arrhenius equation.Volatile fatty acid (VFA) is formed by hydrolysis of organics and accounts for 30% ～ 40% of soluble COD (SCOD).The fraction of acetic acid in the form of VFA is over 55% and increases as the rising of thermal hydrolysis temperature.

关 键 词：污泥 固体有机物 热水解 溶解 一级反应 

分 类 号：X703.1[环境科学与工程—环境工程]