Addition of Bacillus sp. inoculums in bedding for swine on a pilot scale: Effect on microbial population and bedding temperature

Corrêa, Érico Kunde; Ulguim, Rafael da Rosa; Corrêa, Luciara Bilhalva; Castilhos, Danilo Dufech; Bianchi, Ivan; Gil-Turnes, Carlos; Lucia, Thomaz

doi:10.1016/j.biortech.2012.06.033

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…In the first phase of composting, the presence of thermophilic bacteria and other organisms can cause the temperature to reach values higher than 60 °C (Corrêa et al, 2012). These results corroborate with those obtained by Yang (2013), who found in the composting of food waste a rapid increase in temperature in 3 DASC, reaching the thermophilic phase (temperature > 55°C).…”

Section: Resultssupporting

confidence: 89%

“…This happens in the final stage of the composting process with the degradation of organic acids that are produced in the initial stage of decomposition of carbonaceous materials. A group of microorganisms capable of using these organic acids decomposes them; excreting basic substances that raise the pH of the final compost (Corrêa et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

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Composition and mineralization of organic compost derived from composting of fruit and vegetable waste

et al. 2019

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Fruit and vegetable waste can be used for the production of organic compost, which when mineralized can increase the availability of nitrogen. The objectives of this study were: (a) to produce compost from different ratios of fruit and vegetable waste, rice husk and poultry manure that meets the legislation on organic fertilizers and (b) to assess the mineralization of N in substrates prepared with different ratios of compost. In experiment 1, the following treatments were prepared using (fruit and vegetable residue: rice husk: poultry waste) (v:v): Treatment 1 (2:1:0), T2 (1:1:1), T3 (1.5:1:0) and T4 (1.2:1:0). All the treatments were subjected to composting for 95 days, were subjected to analysis of nutrients, organic carbon, C/N, CEC/C, pH and moisture content. The composts were compared in regards to the parameters required by legislation. In experiment 2, the treatments consisted of eight blends of agricultural peat, carbonized rice husk and organic compost pre-selected from experiment 1. The NO 3-N and NH + 4-N contents were analyzed in the substrate at time zero and at 7, 14, 28, 56, 112 days after incubation. Compost (C2) met the parameters required by legislation and the use of 40% in the substrate composition promoted the mineralization of N.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Composition and mineralization of organic compost derived from composting of fruit and vegetable waste

et al. 2019

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“…For example, it is plausible that when bacteria counts in NSA are high, they include high concentrations of nonpathogenic bacterial species that exhibit an antagonistic effect on pathogenic bacteria (Westphal et al, 2011). To our knowledge, the manipulation of bacterial communities in bedding material through inoculation has not been studied as a potential mastitis control strategy, but has been trialed in other farming systems (Corrêa et al, 2012). Regardless of the cause, the various associations between BBC and IMI among bedding materials suggests that there is unlikely to be a universal cut-point for bacterial counts that can be applied across all bedding systems.…”

Section: Association Between Bacteria Count In Used Bedding and Intramentioning

confidence: 99%

Cross-sectional study of the relationships among bedding materials, bedding bacteria counts, and intramammary infection in late-lactation dairy cows

Rowe

Godden

Royster

et al. 2019

Journal of Dairy Science

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Objectives of this study were to (1) describe the intramammary infection (IMI) prevalence and pathogen profiles in quarters of cows approaching dry-off in US dairy herds, (2) compare IMI prevalence in quarters of cows exposed to different bedding material types, and (3) identify associations between bedding bacteria count and IMI in cows approaching dry-off. Eighty herds using 1 of 4 common bedding materials (manure solids, organic non-manure, new sand, and recycled sand) were recruited in a multi-site cross-sectional study. Each herd was visited twice for sampling. At each visit, aseptic quarter-milk samples were collected from 20 cows approaching dry-off (>180 d pregnant). Samples of unused and used bedding were also collected. Aerobic culture was used to determine the IMI status of 10,448 quarters and to enumerate counts (log 10 cfu/mL) of all bacteria, Staphylococcus spp., Streptococcus spp. and Streptococcus-like organisms (SSLO), coliforms, Klebsiella spp., noncoliform gram-negatives, Bacillus spp., and Prototheca spp. in unused (n = 148) and used (n = 150) bedding. The association between bedding bacteria count and IMI was determined using multivariable logistic regression with mixed effects. Quarter-level prevalence of IMI was 21.1%, which was primarily caused by non-aureus Staphylococcus spp. (11.4%) and SSLO (5.6%). Only modest differences in IMI prevalence were observed between the 4 common bedding material types. Counts of all bacteria in unused bedding was positively associated with odds of IMI caused by any pathogen [ALL-IMI; odds ratio (OR) = 1.08]. A positive association was also observed for counts of SSLO in unused bedding and SSLO-IMI (OR = 1.09). These patterns of association were generally consistent across the 4 common bedding materials. In contrast, the association between counts of all bacteria in used bedding and ALL-IMI varied by bedding type, with positive associations observed in quarters exposed to manure solids (OR = 2.29) and organic non-manure (OR = 1.51) and a negative association in quarters exposed to new sand (OR = 0.47). Findings from this study suggest that quarter-level IMI prevalence in latelactation cows is low in US dairy herds. Furthermore, bedding material type may not be an important risk factor for IMI in late lactation. Higher levels of bacteria in bedding may increase IMI prevalence at dry-off in general, but this relationship is likely to vary according to bedding material type.

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“…During composting, materials are decomposed through the action of bacteria, fungi and actinomycetes, resulting in the production of stabilized organic matter and humus [23]. The process is completed when the compost achieves stability, when the microbial activity is reduced to an insignificant level, and maturity, when the phytotoxins are reduced to a safer level [24].…”

Section: Introductionmentioning

confidence: 99%

Full-Scale Composting of Different Mixtures with Meal from Dead Pigs: Process Monitoring, Compost Quality and Toxicity

Guidoni

Martins

Guevara

et al. 2021

Waste Biomass Valor

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Abundant by-products of large swine industries, such as slaughterhouse sludge and carcasses, require adequate treatment to prevent negative effects of their direct disposal in the open environment. This study is aimed to evaluate the efficiency of composting using meal from dead pigs through physicochemical analyses and phytotoxic assays. Five treatments were tested, all including 50% sawdust: T1, with 50% slaughterhouse sludge (control); T2, with 20% slaughterhouse sludge and 30% meal from dead pigs; T3, with 10% slaughterhouse sludge and 40% meal from dead pigs; T4, with 20% organic stabilizing compost and 30% meal from dead pigs and T5, with 30% organic stabilizing compost and 20% meal from dead pigs. The phytotoxicity assays used lettuce, cucumber, celia, soybean, rice and wheat as bioindicators. Inclusion of meal from dead pigs was related to reduction in pH, C/N ratio, humidity and temperatures inside the pile, although thermophilic peaks lasted longer than 50 days and the final composts showed high content of nitrogen and phosphorous. The germination of bioindicators was reduced in all tested treatments, compared to the control. The composts from treatments that included meal from dead pigs presented acceptable nutrient content, which may indicate their use as organic fertilizers. However, after 4 months, all bioindicators in contact with such composts presented impaired germination.

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Addition of Bacillus sp. inoculums in bedding for swine on a pilot scale: Effect on microbial population and bedding temperature

Cited by 3 publications

References 27 publications

Composition and mineralization of organic compost derived from composting of fruit and vegetable waste

Composition and mineralization of organic compost derived from composting of fruit and vegetable waste

Cross-sectional study of the relationships among bedding materials, bedding bacteria counts, and intramammary infection in late-lactation dairy cows

Full-Scale Composting of Different Mixtures with Meal from Dead Pigs: Process Monitoring, Compost Quality and Toxicity

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