Browsing by Author "Tsai, Jen-Chleh"

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High-rate composting of barley dregs with sewage sludge in a pilot scale bioreactor
(2008-05-01)
Lu, Li-An
;
Kumar, Mathava
;
Tsai, Jen-Chleh
;
Lin, Jih-Gaw
;
環境工程研究所
The feasibility of high-rate composting of barley dregs and sewage sludge was examined using a pilot scale bioreactor. A central composite design (CCD) was used to optimize the mix ratio of barley dregs/sewage sludge and moisture content. The performance of the bioreactor was monitored as a function of carbon decomposition rate (CDR) and total volatile solids (TVS) loss rate. The optimum range of mix ratio and moisture content was found to be 35-40% and 55-60%, respectively. High CO2 evolution rate (CER) and TVS loss rate were observed after 3 days of the composting and the compost was matured/stable after 7 days. Cardinal temperature model with inflection (CTMI) was used to analyze the compost stability with respect to CER as a parameter of composting efficiency. After examining the phytotoxicity, the compost can be promoted for land application. (C) 2007 Elsevier Ltd. All rights reserved.