Composition and functional profiling of the microbiota in the casts of Eisenia fetida during vermicomposting of brewers' spent grains

Biotechnology Reports
Marilena BudroniGiacomo Zara

Abstract

Vermicomposting is a cost-effective biotechnology for the management of organic wastes that relies on the activity of earthworms and their associated microbiota. Here, the microbiotas of the earthworm Eisenia fetida fed with brewers' spent grains (FBSG), cow manure (FCM) and a mix of brewers' spent grains/cow manure (FMIX), were identified by high-throughput DNA sequencing (16S rRNA). Bacterial community variance was correlated with the pH and the organic carbon content of the rearing substrates. FBSG microbiota was enriched in Paenibacillaceae, Enterobacteriaceae, Chitinophagaceae and Comamonadaceae. In addition, FBSG microbiota had a predicted higher abundance of genes involved in cellulose degradation as well as in the nitrogen cycle and showed higher utilization of ammonia and nitrate. Results obtained will allow to optimize the vermicomposting of brewers' spent grains and to evaluate the effect of vermicompost addition on nutrient dynamics in soil.

Citations

Jun 26, 2020·World Journal of Microbiology & Biotechnology·Gabriela Vollet MarsonMiriam Dupas Hubinger
Sep 3, 2020·Applied Microbiology and Biotechnology·Angela BiancoGiacomo Zara
Nov 18, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Dafne CrutchikClaudia Pabón-Pereira
Jun 15, 2021·Saudi Journal of Biological Sciences·Fatimah Alshehrei, Fuad Ameen

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Datasets Mentioned

BETA
ERP115720

Methods Mentioned

BETA
PCR

Software Mentioned

vegan
QIIME2
FMIX
Omnilog
Quantitative Insights into Microbial Ecology tool ( QIIME
R
- PM
PICRUSt
FCM

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