污泥热水解过程中固体有机物的变化规律.pdfVIP

2004 Vol. 20 CHINA WATER WASTEWATER No. 7 王治军, 王 伟 ( 清华大学 环境科学与工程系, 北京 100084) : 开展污泥热水解的基础研究可促 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 : 污泥; 固体有机物; 热水解; 溶解; 一级反应 : X703. 1 : A : 1000- 4602( 2004) 07 - 0001- 05 Transformation Regularity of Organic Solids in Sludge Thermal Hydrolysis Process WANG Zh-i un, WANG Wei (Dept fo Environmental Science and Engineering, Tsinghua University, eij ing 100084, China) Abstract : T est was carried out for thermal hydrolysis of sewage sludge from a wastewater treatment plant in Bei ing, the result shows that in the thermal hydrolysis of sludge, organic solids undergo dissolving and hy- drolyzing 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 frac- tion of acetic acid in the form of VFA is over 55% and increases as the rising of thermal hydrolysis tempera- ture. Key words: sludge; organic solid; thermal hydrolysis; dissolving; first- order reaction ( Thermal Hydrolysis) , [ 23] , , 20 90 , ( , , ) , [ 45] , : ,