Dynamics of antibiotic resistance genes and bacterial community during pig manure, kitchen waste, and sewage sludge composting

Copyright © 2023 Elsevier Ltd. All rights reserved..

Organic solid wastes (OSWs) are important reservoirs for antibiotic resistance genes (ARGs). Aerobic composting transforms OSWs into fertilizers. In this study, we investigated ARGs dynamics and their driving mechanisms in three OSW composts: pig manure (PM), kitchen waste (KC), and sewage sludge (SG). The dominant ARGs were different in each OSW, namely tetracycline, aminoglycoside, and macrolide resistance (PM); tetracyclines and aminoglycosides (KC); and sulfonamides (SG). ARGs abundance decreased in PM (71%) but increased in KC (5.9-fold) and SG (1.3-fold). Interestingly, the ARGs abundance was generally similar in all final composts, which was contributed to the similar bacterial community in final composts. In particular, sulfonamide and β-lactam resistant genes removed (100%) in PM, while sulfonamide in KC (38-fold) and tetracycline in SG (5-fold) increased the most. Additionally, ARGs abundance rebounded during the maturation period in all treatments. Firmicutes, Proteobacteria, and Actinobacteria were the main ARGs hosts. Several persistent and high-risk genes included tetW, aadA, aadE, tetX, strB, tetA, mefA, intl1, and intl2. The structural equation models showed ARGs removal was mainly affected by physicochemical parameters and bacterial communities in PM, the ARGs enrichment in KC composting correlated with increased mobile genetic elements (MGEs). In general, thermophilic aerobic composting can inhibit the vertical gene transfer (VGT) of pig manure and horizontal gene transfer (HGT) of sludge, but it increases the HGT of kitchen waste, resulting in a dramatic increase of ARGs in KC compost. More attention should be paid to the ARGs risk of kitchen waste composting.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:345

Enthalten in:

Journal of environmental management - 345(2023) vom: 01. Nov., Seite 118651

Sprache:

Englisch

Beteiligte Personen:

Ma, Ruonan [VerfasserIn]
Wang, Jiani [VerfasserIn]
Liu, Yan [VerfasserIn]
Wang, Guoying [VerfasserIn]
Yang, Yan [VerfasserIn]
Liu, Ying [VerfasserIn]
Kong, Yilin [VerfasserIn]
Lin, Jiacong [VerfasserIn]
Li, Qinfen [VerfasserIn]
Li, Guoxue [VerfasserIn]
Yuan, Jing [VerfasserIn]

Links:

Volltext

Themen:

21240MF57M
Anti-Bacterial Agents
Antibiotic resistance genes
Bacterial community
Composting
F8VB5M810T
Journal Article
Macrolides
Manure
Mobile genetic elements
Organic solid wastes
Sewage
Sulfanilamide
Tetracycline

Anmerkungen:

Date Completed 25.09.2023

Date Revised 25.09.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jenvman.2023.118651

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM359993893