Oct 15, 2023 · During composting, pH is a crucial indicator of microbial activity and population composition [51].The variation in pH values during composting is also shown in Fig. 1.At the start of the composting process (Day 0), the pH of BPA pile mixture was 4.3, known to be due to food waste acidification, which produces organic acids as well as some volatile acids of low-molecular-weight
Jun 15, 2022 · 1. Introduction. Globally, more than half of all antibiotics produced are used in animal husbandry (Van Boeckel et al., 2017; Wang et al., 2019).The larger amount of antibiotics utilization produced selective pressure for microbe in livestock fermentation systems to obtain and remain antibiotic resistance genes (ARGs), and the resistant ability was fostered gradually by the enrichment of the
May 31, 2015 · Fate of Antibiotics and Antibiotic Resistance during Digestion and Composting: A Review. al., 2014). The presence of antibiotics and antibiotic resistance genes (ARGs) in cattle manure and swine manure has also been well documented. For example, Chen et al. (2007) reported up to 3.69 and 5.00 to 9.22 log copies g-1 of erythromycin resistance
Dec 1, 2022 · 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 and ARGs at various stages of aerobic composting of
The findings revealed that the use of compound microbial inoculants increased the compost temperature, accelerated moisture reduction, enhanced cellulase activity, and stimulated the accumulation of NH 4 +-N, NO 3--N, and total nitrogen (TN), resulting in a 9% increase in TN content. The abundance of Firmicutes decreased by 3.95% at the
Nov 1, 2017 · Composting and anaerobic digestion are the main treatment means of livestock manure Liu et al. 2021). Composting has the characteristics of simple operation and is environmentfriendly, so the
Mar 19, 2019 · Review on the removal of antibiotic resistance genes from livestock manure by composting total pore volume: 0.2451 m³/g), which markedly enhanced soil heterogeneity that created a barrier to ...
The high antibiotic resistance gene (ARGs) contents in livestock manure pose a potential risk to environment and human health. The heap composting with an ambient temperature and thermophilic composting are two for converting livestock manure into fertilizer. This study investigated the variations in ARGs and mobile genetic elements (MGEs) and revealed potential mechanisms for ARGs
Manure production The for cattle selection, manure collection, and small-scale composting were described in a prior study focused on the fate of antibiotics [36]. In summary, ma-nure for composting was procured from eighteen indi-vidually housed steers and cows selected for their respectively similar body weights, history of antibiotic
Jan 10, 2024 · These inoculants are commonly used for composting of livestock manure and crop residues (Greff et al., 2022). Compared with food waste, PCFW contains higher content of sugar and lipid (Ho and Chu, 2019), which leads to more serious acidification and extended process during compost. Therefore, combined approaches were preferable.
much equipment has been developed to cope with the large quantities involved. Enhanced corrosion in crevices and awkward corners can be avoided at the design stage by the use of round-section tankers and other equipment. Slurry is a mixture of dung and urine, and farmyard manure (FYM) is slurry composted with litter, i.e. straw or wood shavings
Jan 1, 2024 · Livestock manure use in agriculture contributes to pollutants like antibiotic resistance genes (ARGs) and resistant bacteria. This practice could potentially facilitate ARGs development in soil ecosystems. Our study aimed to explore ARGs and bacterial communities in cattle manure from Ningxia beef cattle farms with varying breeding periods.
Jan 15, 2018 · A pot experiment was conducted to examine temporal changes in ARGs, mobile genetic elements (MGEs), and bacterial communities in a weakly developed loamy soil (an entisol known as calcareous purple soil) upon addition of pig or chicken manure to provide a better understanding of the mechanisms underlying the dynamics of ARGs in entisols following manure application.
May 1, 2024 · This study is expected to improve the understanding of how contaminated livestock manure can be effectively utilized. 2. Materials and 2.1. Composting process. Fresh dairy cattle manure and wheat straw were obtained from Jinyindao Farm in Daxing, Beijing and wheat fields in Lianyungang, Jiangsu Province, respectively.
Apr 1, 2021 · Here, we carried out a comprehensive parallel examination of the effects of small-scale (> 55 °C × 3 days) static and turned composting of manures from dairy and beef cattle collected during