Effects of initial microbial community structure on the performance of solid-state anaerobic digestion of corn stover

2020 ◽  
Vol 260 ◽  
pp. 121007 ◽  
Author(s):  
Yu Lu ◽  
Qi Zhang ◽  
Xiangyou Wang ◽  
Hui Zhong ◽  
Jiying Zhu
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Anaerobic Digestion ◽  
Solid State ◽  
Corn Stover ◽  
Microbial Community Structure

scholarly journals Antibiotic resistome and microbial community structure during anaerobic co-digestion of food waste, paper and cardboard

2020 ◽  
Vol 96 (2) ◽  
Author(s):  
Kärt Kanger ◽  
Nigel G H Guilford ◽  
HyunWoo Lee ◽  
Camilla L Nesbø ◽  
Jaak Truu ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Solid State ◽  
Food Waste ◽  
Microbial Community Structure ◽  
Microbial Community Composition ◽  
Microbial Community Analysis ◽  
Waste Paper ◽  
Rrna Gene ◽  
Significant Shift

ABSTRACT Solid organic waste is a significant source of antibiotic resistance genes (ARGs) and effective treatment strategies are urgently required to limit the spread of antimicrobial resistance. Here, we studied ARG diversity and abundance as well as the relationship between antibiotic resistome and microbial community structure within a lab-scale solid-state anaerobic digester treating a mixture of food waste, paper and cardboard. A total of 10 samples from digester feed and digestion products were collected for microbial community analysis including small subunit rRNA gene sequencing, total community metagenome sequencing and high-throughput quantitative PCR. We observed a significant shift in microbial community composition and a reduction in ARG diversity and abundance after 6 weeks of digestion. ARGs were identified in all samples with multidrug resistance being the most abundant ARG type. Thirty-two per cent of ARGs detected in digester feed were located on plasmids indicating potential for horizontal gene transfer. Using metagenomic assembly and binning, we detected potential bacterial hosts of ARGs in digester feed, which included Erwinia, Bifidobacteriaceae, Lactococcus lactis and Lactobacillus. Our results indicate that the process of sequential solid-state anaerobic digestion of food waste, paper and cardboard tested herein provides a significant reduction in the relative abundance of ARGs per 16S rRNA gene.

Effect of H2 addition on the microbial community structure of a mesophilic anaerobic digestion system

Energy ◽  
2020 ◽  
Vol 198 ◽  
pp. 117368 ◽  
Author(s):  
Xianpu Zhu ◽  
Liumeng Chen ◽  
Yichao Chen ◽  
Qin Cao ◽  
Xiaofeng Liu ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Anaerobic Digestion ◽  
Microbial Community Structure ◽  
H2 Addition
Sign in / Sign up

Export Citation Format

Share Document