4.8 Article

Simulation of water removal process and optimization of aeration strategy in sewage sludge composting

期刊

BIORESOURCE TECHNOLOGY
卷 171, 期 -, 页码 452-460

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.07.006

关键词

Aeration strategy; Water removal; Sewage sludge; Mathematical model

资金

  1. State Environmental Protection Public Welfare Professional Program of China [201209022]
  2. National Key Technology R&D Program of China [2012BAC25B03]

向作者/读者索取更多资源

Reducing moisture in sewage sludge is one of the main goals of sewage sludge composting and biodrying. A mathematical model was used to simulate the performance of water removal under different aeration strategies. Additionally, the correlations between temperature, moisture content (MC), volatile solids (VS), oxygen content (OC), and ambient air temperature and aeration strategies were predicted. The mathematical model was verified based on coefficients of correlation between the measured and predicted results of over 0.80 for OC, MC, and VS, and 0.72 for temperature. The results of the simulation showed that water reduction was enhanced when the average aeration rate (AR) increased to 15.37 m(3) min (1) (6/34 min/min, AR: 102.46 m(3) min (1)), above which no further increase was observed. Furthermore, more water was removed under a higher on/off time of 7/33 (min/min, AR: 87.34 m(3) min (1)), and when ambient air temperature was higher. (C) 2014 Elsevier Ltd. All rights reserved.

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