期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 169, 期 -, 页码 126-131出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2015.12.029
关键词
Waste valorization; Soy fiber residues; Bacillus thuringiensis; Soil amendment; Solid state fermentation; Compost
资金
- Spanish Ministry of Economia y Competitividad [CTM 2012-33663]
- FEDER
- Peruvian Government
There is a growing generation of biodegradable wastes from different human activities from industrial to agricultural including home and recreational activities. On the other hand, agricultural and horticultural activities require significant amounts of organic amendments and pesticides. In this framework, the present study evaluates the viability of soy fiber residue valorization as organic soil amendment with biopesticide properties through aerobic solid-state fermentation (SSF) in the presence of Bacillus thuringiensis (Bt). The experiments were performed first under sterile and non-sterile conditions at lab scale using 115 g of sample and controlled temperature (30 degrees C). Bt growth was successful in sterile conditions, obtaining 6.2 x 10(11) CFU g(-1) DM and 8.6 x 10(10) spores g(-1) DM after 6 days. Bt survived on solid culture under non-sterile conditions (3.8 x 10(9) CFU g(-1) DM and 1.3 x 10(9) spores g(-1) DM). Further, the valorization process was scaled-up to 10 L reactors (2300 g) under non-sterile conditions obtaining a final stabilized material with viable Bt cells and spores (9.5 x 10(7) CFU g(-1) DM and 1.1 x 10(8) spores g(-1) DM in average) after 9 days of SSF. These results confirm the possibility of managing biodegradable wastes by their transformation to a waste derived soil amendment with enhanced biopesticide effect, in comparison to traditional compost using a valuable and low-cost technique (SSF). (C) 2015 Elsevier Ltd. All rights reserved.
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