Uncovering new indicators to predict stability, maturity and biodiversity of compost on an industrial scale

[Display omitted] •Heterogeneity of composting process hinds the establishment of bioindicators.•Biodiversity and respirometric index affect phytostimulant power of compost.•Phenolic content and nitrification index could impact compost biodiversity.•Compost biodiversity is greater the lower the acti...

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Bibliographic Details
Published in:Bioresource technology 2020-10, Vol.313, p.123557-123557, Article 123557
Main Authors: Estrella-González, M.J., Suárez-Estrella, F., Jurado, M.M., López, M.J., López-González, J.A., Siles-Castellano, A.B., Muñoz-Mérida, A., Moreno, J.
Format: Article
Language:English
Subjects:
Biodiversity
Industrial compost
Maturation
Respirometric index
Stability
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Summary:[Display omitted] •Heterogeneity of composting process hinds the establishment of bioindicators.•Biodiversity and respirometric index affect phytostimulant power of compost.•Phenolic content and nitrification index could impact compost biodiversity.•Compost biodiversity is greater the lower the activity of xylanase.•Different raw materials evolve similar products by different bioestrategies. Currently, the metagenomic study of the composting process has gained great importance since it has allowed the identification of the existence of microorganisms that, until now, had not been isolated during the process by traditional techniques. However, it is still complex to determine which bioindicators could reveal the degree of maturity and stability of a particular compost. Thereby, the main objective of this work was to demonstrate the possible correlation between traditional parameters of maturity and stability of compost, with other indicators of biodiversity in products highly heterogeneous from composting processes on an industrial scale. The results demonstrated the enormous influence of the raw materials in characterizing the products obtained. Even so, important relationships were established between the Chao1 and Shannon indexes, and certain parameters related to the maturity, stability and toxicity of the samples, such as nitrification index, humification rate, phenolic content, germination index or oxygen consumption.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2020.123557