Adding value to home compost : Biopesticide properties through Bacillus thuringiensis inoculation

Copyright © 2020 Elsevier Ltd. All rights reserved.

Détails bibliographiques
Publié dans:Waste management (New York, N.Y.). - 1999. - 106(2020) vom: 01. Apr., Seite 32-43
Auteur principal: Ballardo, Cindy (Auteur)
Autres auteurs: Vargas-García, María Del Carmen, Sánchez, Antoni, Barrena, Raquel, Artola, Adriana
Format: Article en ligne
Langue:English
Publié: 2020
Accès à la collection:Waste management (New York, N.Y.)
Sujets:Journal Article Bacillus thuringiensis Biopesticide Enriched compost Home composting Microbiocenosis Biological Control Agents Soil
Description
Résumé:Copyright © 2020 Elsevier Ltd. All rights reserved.
Home and community composting are considered potential tools for the self-management of organic waste. The production of added value products from biowaste is an encouraging step further to valorise this waste stream. To increase the profits of homemade compost, this paper presents a strategy to produce enriched home compost with biopesticide properties through a simple and low-cost process. Bacillus thuringiensis (Bt) was inoculated in a home composter bin through a solid inoculum previously prepared using the same waste as substrate. The process was monitored and compared with a home composting control process without inoculation. Final composts were analysed and compared in terms of physicochemical and microbiological properties, respiration and germination indices, indicating the suitability of both to be used as organic amendments. Also, a standardized toxicity test proved that Bt-enriched compost can be safely applied to the soil. Microbiological analysis revealed highly diverse communities in both cases, with limited differences at phylum taxonomic level, but dissimilar relative abundances of species within phylum. Bacteroidetes and Proteobacteria were dominant, with the presence of species able to transform organic matter from vegetal origin, but not usually related to compost. Bt-cristal toxin was clearly present in Bt-enriched compost, indicating the coexistence of Bt with the different microbial populations till the end of the composting process. Although Bt has been widely investigated due to its biopesticide properties, the incorporation of this microorganism to home composting level has not been previously reported
Description:Date Completed 14.04.2020
Date Revised 14.04.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1879-2456
DOI:10.1016/j.wasman.2020.03.003