期刊
JOURNAL OF CLEANER PRODUCTION
卷 121, 期 -, 页码 169-175出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2015.04.081
关键词
Sewage sludge; Solid organic residues; Composting; Respirometric method; Rotary reactor
资金
- [CNPq/DT2011-31424/2011-2]
This paper has the objective of monitoring the biological activity of composting process of sewage sludge, sugarcane bagasse and ground coffee in a hermetic rotary reactor using the respirometric method in laboratory scale, in order to obtain parameters and system design for large scale projects. Another particularity of this study is the use of a hermetic reactor with gas purging cycles. Purging was performed when the percentage of oxygen reached less than 5%, thus eliminating the gaseous mixture (with elevated CO2 ratio) and the introduction of environmental air with around 21% of O-2, successively until the compost was stabilized. The average purge intervals obtained were 29 h and 2 min with reactor rotation frequency of 15 min. The time of the compost stabilization was optimized in 60% if compared to the 90 days in the traditional method. The results obtained can be used to design the process in industrial scale using a simple O-2 gas analyzer. (C) 2015 Elsevier Ltd. All rights reserved.
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