Impacts of biochar on the environmental risk of antibiotic resistance genes and mobile genetic elements during anaerobic digestion of cattle farm wastewater.
Bioresour Technol
; 256: 342-349, 2018 May.
Article
en En
| MEDLINE
| ID: mdl-29471229
ABSTRACT
Biochar has positive effects on nitrogen conservation during anaerobic digestion, but its impacts on antibiotic resistance genes (ARGs) are unclear. Therefore, the effect of biochar (0, 5, 20, and 50â¯g/L) on the environmental risk of ARGs during cattle manure wastewater anaerobic digestion were investigated. The results showed that 5â¯g/L biochar reduced the relative abundances (RAs) of 5/13 ARGs while 20â¯g/L biochar significantly reduced the total RAs of ARGs in the digestion products, where the RA of ISCR1 was 0.89 log lower than the control. Biochar mainly affected the distribution of ARGs by influencing the RAs of Firmicutes and Proteobacteria, and the influence of 20â¯g/L biochar was greater than that of 5â¯g/L. Mobile genetic elements also influenced the ARG profiles, especially intI2 and ISCR1. The addition of 20â¯g/L biochar to cattle farm wastewater anaerobic digestion systems could reduce the environmental risk of ARGs.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carbón Orgánico
/
Aguas Residuales
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Bioresour Technol
Asunto de la revista:
ENGENHARIA BIOMEDICA
Año:
2018
Tipo del documento:
Article
País de afiliación:
China