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Author(s): Maria Elisabete F. Silva
Ana R. Lopes
Ana Cristina Cunha Queda
Olga C. Nunes
Title: Comparison of the bacterial composition of two commercial composts with different physicochemical, stability and maturity properties
Issue Date: 2016
Abstract: Previously, two municipal solid waste commercial composts (MSW1 and MSW2) were characterized.Although sharing the same type of raw material, most of their physicochemical, stability and maturityproperties differed. The present study aimed to characterize them at a microbiological level, and to inferon possible relationships between the composts properties and the structure of their bacterial communities. Both the 16S rRNA gene-based PCR-DGGE profiling and 454-pyrosequencing technology showedthat the structure of the bacterial communities of these composts was distinct. The bacterial communityof MSW1 was more diverse than that of MSW2. Multivariate analyses revealed that the high electricalconductivity, Cu content as well as the low phytotoxity of compost MSW1, when compared to MSW2,contributed most to shape its bacterial community structure. Indeed, high abundance of halophilic(Halomonadaceae and Brevibacteriaceae) and metal resistant organisms (Brevibacteriaceae andBacillaceae) were found in MSW1. In addition, Pseudonocardiaceae, Streptomycetaceae, Bacillaceae, andBrevibacteriaceae may have contributed to the high humic-like acids content and low phytotoxicity ofMSW1. In contrast, the high organic matter content and the high density of the cultivable fungi population were the parameters most correlated with the structure of the bacterial community of compostMSW2, dominated by Corynebacteriaceae and mainly Aerococcaceae, taxonomic groups not commonlyfound in composts
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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