Portal de Periódicos da CAPES

High-rate composting of barley dregs with sewage sludge in a pilot scale bioreactor

2007; Elsevier BV; Volume: 99; Issue: 7 Linguagem: Inglês

10.1016/j.biortech.2007.05.030

1873-2976

Li-An Lu, Mathava Kumar, Jen-Chieh Tsai, Jih‐Gaw Lin,

biodegradable polymer synthesis and properties

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.