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
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.
Nov 27, 2023 · The changes in the physicochemical properties and nutrient elements of compost products were studied. The results show that the co-composting of livestock manure and wheat straw can promote the decomposition of the pile, and the addition of 40% cow manure and 30% pig manure has the best effect in promoting decay.
Dec 5, 2022 · Fang et al. combined intermittent aeration with membrane covering for cattle manure composting and found that the combined process reduced CH 4 emissions by 99.89% compared to the control. Through the above studies, it was found that membrane covering can effectively improve the efficiency of carbon and nitrogen fixation in compost and reduce
Apr 15, 2024 · Despite global efforts, most manure is not adequately processed before use on fields, escalating the spread of antimicrobial resistance. This study examined how different cattle manure treatments, including composting and storage, affect its microbiome and resistome.
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
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
Sep 5, 2016 · Livestock manure is often subjected to aerobic composting but little is known about the variation in antibiotic resistance genes (ARGs) during the composting process under different concentrations of antibiotics. This study compared the effects of three concentrations of oxytetracycline (OTC; 10, 60
Apr 5, 2024 · Use a compost turner, like a shovel or pitchfork, to move the compost from the edges to create another pile. Shovel the compost from the middle of the original pile onto the new one. Water the manure again and let it sit until the cow dung compost reaches 130°F for three straight days.
Jul 21, 2023 · As livestock and poultry farming expands in China, the generation of fecal waste has significantly increased. Inadequate waste management can contribute to environmental pollution. This study seeks to optimize small-scale composting systems to address the inefficiencies and the limited automation of traditional composting equipment. We redesigned the mixing blades and refined the ventilation
Jan 8, 2020 · Journal of environmental quality. 2016. TLDR. Current literature on the fate of antibiotics, ARB, and antibiotic resistance genes (ARGs) during anaerobic digestion and composting of manure and wastewater residuals demonstrates that composting significantly reduces levels of extractable antibiotics in livestock manure in nearly all cases. Expand.
Jul 27, 2023 · This study provides compelling evidence that the cow manure composting equipment proposed herein significantly enhances the efficiency of livestock manure composting while yielding high-quality organic fertilizer.
Turning manure is essential to composting manure. Turning compost incorporates oxygen into the system, homogenizes the pile and breaks up clumps. Turning allows more contact of manure with microbes. Producers have various ways to turn the pile. The two most common for turning compost are with a windrow turner (Figure 7) or bucket tractor.
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
Mar 1, 2020 · Here we investigated the variation of antibiotic resistome and its influencing factors during a commercial livestock manure composting. The results showed that composting could effectively reduce the relative abundance of ARGs and mobile genic elements (MGEs).