| Simulation of substrate degradation in composting of sewage sludge | |
| Gao D.; Chen J. | |
| 2010 | |
| 关键词 | mathematical-model kinetic-analysis temperature profiles validation patterns wastes |
| 英文摘要 | To simulate the substrate degradation kinetics of the composting process, this paper develops a mathematical model with a first-order reaction assumption and heat/mass balance equations. A pilot-scale composting test with a mixture of sewage sludge and wheat straw was conducted in an insulated reactor. The BVS (biodegradable volatile solids) degradation process, matrix mass, MC (moisture content), DM (dry matter) and VS (volatile solid) were simulated numerically by the model and experimental data. The numerical simulation offered a method for simulating k (the first-order rate constant) and estimating k(20) (the first-order rate constant at 20 degrees C). After comparison with experimental values, the relative error of the simulation value of the mass of the compost at maturity was 0.22%, MC 2.9%, DM 4.9% and VS 5.2%, which mean that the simulation is a good fit. The k of sewage sludge was simulated, and k(20), k(20s) (first-order rate coefficient of slow fraction of BVS at 20 degrees C) of the sewage sludge were estimated as 0.082 and 0.015 d(-1), respectively. (C) 2010 Published by Elsevier Ltd. |
| 出处 | Waste Management |
| 卷 | 30 |
| 期 | 10 |
| 页 | 1931-1938 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0956-053X |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22417]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Gao D.,Chen J.. Simulation of substrate degradation in composting of sewage sludge. 2010. |
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