Animal manure is a primary repository of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs). This work explored the efficiency of ARGs and MGEs removal during pig manure composting after thermal pretreatment (TPC) and the underlying mechanisms. TPC resulted in a decrease of 94.7%
Jan 15, 2022 · Livestock manure has been identified as a significant hotspot for antibiotic resistance genes (ARGs). However, the impact of nanoscale zero-valent iron (nZVI) on the fate of ARGs during livestock manure composting remains poorly understood. Here, we investigated the evolution of ARGs in chicken manure compost exposed to 100 and 600 mg kg −1
This study explored the effects of Bacillus subtilis at four levels (0, 0.5%, 1%, and 2% w/w compost) on the variations in ARGs, mobile genetic elements (MGEs), and the bacterial community during composting. The composting process had a greater impact on ARGs than Bacillus subtilis. The main ARG detected was sul1.
Jun 22, 2022 · One way to increase yields in agriculture using organic alternative is the introduction of manure-based composts into the soil. However, the use of such composts carries a risk of soil contamination with antibiotic resistance genes (ARG) from the gut and manure of the livestock. The contamination of the composts with heavy metals or antibiotics can increase this risk, while the
Jul 21, 2023 · This study was designed to investigate the efficiency of improved composting equipment in enhancing the composting process of livestock manure. The optimized equipment addresses issues of poor mixing effect, low automation level, and extended composting cycles in traditional composting .
composting reactors play the role of both storage and treatment for manure that shortens the manure management chain. Its high efficiency and small size make it an ideal in-situ manure treatment method for intensive livestock farms. It could thus be used both in Region I and II to achieve NH3
Dec 1, 2022 · Abstract. The presence of large amounts of antibiotic resistance genes (ARGs) in livestock manures poses an impending, tough safety risk to ecosystems. To investigate more comprehensively the mechanisms of ARGs removal from industrial-scale composting of livestock manure based on biochar addition, we tracked the dynamics of bacterial community
Mar 5, 2021 · Several studies have evaluated composting to remove hormones in manure. After a 76-day composting study, the total concentrations of steroid hormones in beef cattle manure were reduced by up to 87% (Bartelt-Hunt et al., 2013). A study on poultry manure reported that the levels of water-soluble E2β and testosterone decreased by 84% and 90%
Jan 1, 2024 · As a result, the GI index continued to increase, reaching 91.26% in the F treatment and 103.16% in the FM treatment by the end. Both GI indexes were significantly higher than that in the CK treatment (85.69%). Both compost piles reached a harmless and mature state. FM compost products played a positive role in seed growth.
Dec 7, 2023 · Enhanced corrosion and wear resistance of Zn–Ni/Cu–Al 2022/11/21/ · In order to improve the cathodic protection and wear resistance of cold spraying Zn-based coatings, Zn–Ni/Cu–Al2O3 composite coating was prepared by co-depositing Zn powders, nickel-coated Cu powders, and Al2O3 powders on the steel substrate using the low
Jan 1, 2024 · Co-composting of kitchen waste and chicken manure reduces the pH of compost pile. •. Electric field-assisted aerobic co-composting (EFAC) mitigated NH 3 emission. •. EFAC promotes organic matter humification and increases compost maturity. •. EFAC provides a feasible idea for the resourceful disposal of mixed organic wastes. Abstract.
Jan 20, 2022 · The use of livestock manure is an important way for antibiotic resistance genes (ARGs) to enter the environment, and composting is an effective method for removing ARGs from livestock manure. In
Jul 1, 2020 · Compost is often used for the harmless treatment of livestock manure. Composting is a complex biochemical process that relies on the interaction of highly diverse microbial communities to convert
Apr 15, 2021 · Request PDF | Enhanced control of sulfonamide resistance genes and host bacteria during thermophilic aerobic composting of cow manure | Traditional composting has already shown a certain effect in
Jul 27, 2023 · Traditional cow manure composting equipment often lacks ventilation, heating, and real-time monitoring and adjustment capabilities, hindering manure maturation and proper utilization of compost, moisture reduction, and optimal environmental conditions for microbial activity.