Comparison of the bacterial composition of two commercial composts with different physicochemical, stability and maturity properties

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Maria Elisabete F. Silva (Author) Other; Ana R. Lopes (Author) FEUP; Ana Cristina Cunha Queda (Author) Other; Olga C. Nunes (Author) FEUP

Journal

Title: Waste Management

Vol. 50

Pages: 20-30

ISSN: 0956-053X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 13 Citations

INSPEC

Associated Projects

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

Other information

Authenticus ID: P-00K-WJ6

DOI: 10.1016/j.wasman.2016.02.023

Abstract (EN): 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 maturity properties differed. The present study aimed to characterize them at a microbiological level, and to infer on 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 showed that the structure of the bacterial communities of these composts was distinct. The bacterial community of MSW1 was more diverse than that of MSW2. Multivariate analyses revealed that the high electrical conductivity, 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 and Bacillaceae) were found in MSW1. In addition, Pseudonocardiaceae, Streptomycetaceae, Bacillaceae, and Brevibacteriaceae may have contributed to the high humic-like acids content and low phytotoxicity of MSW1. 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 compost MSW2, dominated by Corynebacteriaceae and mainly Aerococcaceae, taxonomic groups not commonly found in composts

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11