Jan 1, 2024 · During the maturation stage, the abundance of the members of Firmicutes decreases as the composting time goes. The members of Firmicutes were reported to be tetracycline-resistant bacteria (Whitehead et al., 2015). It was speculated that the decrease in tetracycline resistance genes in this experiment might be related to the mutation of Firmicutes.
Mar 9, 2022 · Xie et al. (2016) determined the abundances of 213 ARGs and 10 marker genes for mobile genetic elements (MGEs) in commercial composts made from cattle, poultry, and swine manures in Eastern China, and they found that fresh poultry manure had the highest diversity of ARGs (137 genes detected), followed by fresh cattle manure (121 genes detected).
In this study, we compared 3 different dairy manure composting —anaerobic fermentation (AF), static compost (SC), and organic fertilizer production (OFP)—for their effects on antibiotic-resistant bacteria, antibiotic resis-tance genes, and microbial community diversity in the treated manures.
Apr 1, 2024 · In the late fermentation period, except for the neutral group and the control group, the pH of other groups was stable near the control value, indicating that the fermentation system was running stably at this time, while the pH of the neutral group and the control group showed an obvious trend of first decreasing and then increasing. 3.3.
Feb 13, 2023 · In order to solve the problem of H2S corrosion in biogas utilization, it is necessary to understand the characteristics and mechanisms of H2S production in chicken manure anaerobic digestion (CMAD) and vegetable waste anaerobic digestion (VWAD). In this study, lab-scale batch tests of CMAD and VWAD were conducted for 67 days at 35 °C. The results showed that sulfide was found to be the major
Apr 24, 2020 · Livestock production residues are commonly used as substrates in agricultural biogas plants for energy recovery. Cattle and poultry manure can be converted to biogas in farm-scale or centralized biogas plants to produce heat and power. This study investigated batch anaerobic digestion of chicken manure coupled with a biological pre-treatment step. The primary objective of this laboratory-scale
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
May 5, 2023 · The objective of this work was to determine the potential of chicken manure as a substrate for biogas production after pretreatment. The effects of removing excess nitrogen from chicken manure by water extraction in a temperature range from 20 °C to 60 °C to increase methane production were investigated. The dynamics of the process and efficiency of biogas production were also analyzed. As a
Nov 12, 2021 · Traditional chicken manure fermentation is mostly natural composting or exposure, which is not only time consuming but also susceptible to weather, resulting in uncontrollable quality and environmental pollution. This research aims to build a smart solar chicken manure fermentation system to control the conditions of chicken manure fermentation effectively, improve quality, and solve the
Feb 1, 2020 · The inside of the anaerobic fermentation tank is installed with a mesh stainless steel electrode and a carbon rod electrode to provide a low voltage (0.3–0.8 V). The weak magnetic environment of the anaerobic fermentation system is produced by rubber magnet, which belongs to a ferrite material.
Jan 19, 2021 · Dwindling fossil fuels, and the rise in energy demand have urged us to explore alternative renewable energy forms. An integrated process of dark fermentation and microalgal cultivation to deliver biofuels are gaining momentum in recent times. In this study, in the first stage, the starchy wastewater (SWW) with poultry manure (PM) was treated to produce a maximum hydrogen yield of 4.11 mol H2
Rajagopal et al. [ 62] investigated chicken manure fermentation (with straw) at a TS concentration of 30%. Anaerobic digestion with a loading rate of 5.4 g VS/ (kg inoculum*day) and 21.6 g VS/ (kg inoculum*day) at 20 °C was conducted. The authors reported that methane yield was lower at a higher loading rate.
Nov 12, 2021 · 2.2. Structure Design and Construction of Fermentation Tank In this study the fermentation tank system was built on the outdoor ground, and a shelter was installed to avoid serious disturbance or rainwater accumulation. The structure of the fermentation tank includes blowers, pumping motors, and three-phase motors (Figure3).
Mar 21, 2021 · Their ability to drive composting process thus likely explain increase in their relative abundances. Moreover, the four types of fermented manure composts which were dominated by different microbiota can be used as microbial inoculant to regulate the soil microbial community that promoting crop growth or stress resistance.
May 2, 2023 · Anaerobic digestion of animal manure results in the production of renewable energy (biogas) and nutrient-rich biofertilizer. A further benefit of the technology is decreased greenhouse gas emissions that otherwise occur during manure storage. Since animal manure makes anaerobic digestion cost-efficient and further advance the technology for higher methane yields, it is of utmost importance to