Aug 20, 2020 · This study investigated the interplay effects of key operational factors on maturity, gaseous emissions, and energy efficiency during composting of livestock manure digestate. Orthogonal experiments were conducted with three factors: digestion duration (15, 30, 45 days), corn stalk addition (15%, 25%, 35%, wet weight based), and aeration rate
Dec 1, 2022 · In this study, we used both chicken and pig manure as the main composting substrates and applied biochar to construct multiple industrial-scale composting systems for processing. By the means of high-throughput sequencing and quantitative PCR technologies, we characterized the dynamic changes of the bacterial community, ARGs and MGEs, during
Feb 21, 2024 · Proper composting treatment of poultry manure waste is recommended before its use as a fertilizer. This involves many bioprocesses driven by microorganisms. Therefore, it is important to understand microbial mechanisms behind these bioprocesses in manure composting systems. Many efforts have been made to study the microbial community structure and diversity in these systems using high
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Dec 12, 2023 · Composting requires a certain balance of carbon-rich materials (“browns”), such as dry leaves and untreated wood chips, to nitrogen-rich materials (“greens”), such as food scraps. The ideal ratio is roughly three parts browns to one part greens by volume. (This translates to roughly 30:1 in terms of elemental carbon to nitrogen or C:N.)
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Oct 25, 2020 · Soil health is the capacity of the soil to provide an environment for optimum growth and development of plants, while also ensuring the health of animals and humans. Animal manure has been used for centuries as a source of nutrients in agriculture. However, many other soil properties that contribute to soil health are affected when manure is applied. Bulk density, aggregate stability
Sep 1, 2021 · Aerobic composting is commonly used to dispose livestock manure and is an efficient way to reduce antibiotic resistance genes (ARGs). Here, the effects of different quality substrates on the fate of ARGs were assessed during manure composting. Results showed that the total relative abundances of ARG
Sep 15, 2021 · 1. Introduction1.1. Livestock waste production and the resulting environmental impact. According to a recent report, world population has doubled in the last 40 years and reached 7.7 billion in 2019; with a current growth rate of 1.08% per year the population is estimated to reach 9 billion by 2037 (Max et al., 2019).
On-farm composting is an approved method to dispose of livestock mortalities. Advantages include increased biosecurity, timely disposal of mortalities, low risk of environmental contamination, low cost, and relatively simple to do. Composting can be used for occasional mortality, emergency livestock mass casualties, and disease outbreaks.
Apr 13, 2024 · Biochar is difficult to make pellets on its own. The pelleting of biochar mixed with livestock manure compost could have the following advantages: (1) use compost as a binder, (2) reduce the moisture content of compost for pelleting by simply mixing without drying, and (3) promote the application of biochar for carbon sequestration by simultaneous application with agricultural machinery for
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
Mar 1, 2014 · Published values for TN in runoff/leachate from beef feedlot manure compost (Eghball et al., 1997), food/yard waste (Seymour and Bourdon, 2003), or co-composts of household wastes and cow manure (Ulén, 1997) overlapped our range , whereas cow manure compost (Ulén, 1993) was slightly lower.
Studies on livestock manure and sludge composting processes consistently report a progressive rise in SUVA 254 values as composting advances, with values ranging from 3.04 to 3.82 observed at compost maturity [44], [164], [196].
Nov 1, 2009 · Thus, adequate composting management of the manure is required in order to obtain a quality compost. Therefore, different aeration strategies, substrate conditioning-feedstock formulation, bulking agents and process control options have been used in manure composting in order to reduce composting time and costs and enhance the quality of the