Thermal-alkaline solubilization of waste activated sludge as a pre-treatment stage for anaerobic digestion

被引：222

作者：

Vlyssides, AG ^{[1
]}

Karlis, PK ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Dept Chem Engn, Lab Organ & Chem Technol, Athens 15700, Greece

来源：

BIORESOURCE TECHNOLOGY | 2004年 / 91卷 / 02期

关键词：

waste activated sludge; thermal; pretreatment; alkaline; lime; solubilization; hydrolysis;

D O I：

10.1016/S0960-8524(03)00176-7

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This work studied the hydrolysis kinetics and the solubilization of waste activated sludge under a medium range temperature (50-90 degreesC) and pH in the alkaline region (8-11), as a pretreatment stage for anaerobic digestion. The hydrolysis rate for the solubilization of volatile suspended solids (VSS) followed a first-order rate. A linear polynomial hydrolysis model was derived from the experimental results leading to a satisfactory correlation between the hydrolysis rate coefficient, pH, and temperature. At pH 11 and a temperature of 90 degreesC the concentration of the VSS was 6.82%, the VSS reduction reached 45% within ten hours and at the same time the soluble COD was 70.000 mg/l and the total efficiency for methane production 0.28 l of CH4 per g of VSS loading. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：201 / 206

页数：6

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