An evaluation of an autothermal aerobic digestion system

被引：17
|
作者：
Riley, DW
Forster, CF
机构：
[1] United Utilities plc, Wastewater Technical Support Facility, Ellesmere Port Sewage Treatment Works, Cheshire, United Kingdom
[2] School of Civil Engineering, University of Birmingham, Edgbaston, Birmingham, United Kingdom
[3] School of Civil Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
来源：
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2002年 / 80卷 / B2期
关键词：
sewage sludge; aerobic digestion; thermophilic; autothermal; performance;
D O I：
10.1205/095758202753553220
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
he specifications of the Safe Sludge Matrix mean that there is a need to examine treatment processes which achieve a degree of digestion. There are a number of processes which operate in the thermophilic range. This Study examines one such option, an autothermal thermophilic aerobic digester (ATAD) which uses a high aspect ratio design and a hyperbolic stirrer. Mixing times were found to range from 4 to 10 minutes and oxygenation capacities from 10 to 30 kg h(-1). Using a hydraulic retention time of 7 days, autothermal conditions did occur with a specific heat yield of 15.68 MJ kg(-1) oxygen. A comparison of a range of air:liquid ratios (v/v) showed that a ratio of 0.5:1 Would be recommended, This gave a reduction in volatile solids of 35%.
引用
收藏
页码：100 / 104
页数：5
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