Advantageous microbial community development and improved performance of pilot-scale field systems treating high-risk acid mine drainage with crab shell.
J Hazard Mater
; 420: 126665, 2021 10 15.
Article
in En
| MEDLINE
| ID: mdl-34351284
ABSTRACT
Microbial communities are crucial to the effectiveness and stability of bioremediation systems treating acid mine drainage (AMD); however, little research has addressed how they correlate to system performance under changing environmental conditions. In this study, 16S rRNA gene sequencing and quantitative PCR (qPCR) were used to characterize microbial communities within different substrate combinations of crab shell (CS) and spent mushroom compost (SMC) and their association with chemical performance in pilot-scale vertical flow ponds (VFPs) treating high risk AMD in central Pennsylvania over 643 days of operation. As compared to a control containing SMC, VFPs containing CS sustained higher alkalinity, higher sulfate-reducing rates, and more thorough metals removal (>90% for Fe and Al, >50% for Mn and Zn). Correspondingly, CS VFPs supported the growth of microorganisms in key functional groups at increasing abundance and diversity over time, especially more diverse sulfate-reducing bacteria. Through changing seasonal and operational conditions over almost two years, the relative abundance of the core phyla shifted in all reactors, but the smallest changes in functional gene copies were observed in VFPs containing CS. These results suggest that the high diversity and stability of microbial communities associated with CS are consistent with effective AMD treatment.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Brachyura
/
Microbiota
Type of study:
Etiology_studies
/
Risk_factors_studies
Limits:
Animals
Language:
En
Journal:
J Hazard Mater
Journal subject:
SAUDE AMBIENTAL
Year:
2021
Document type:
Article
Affiliation country:
China