Evaluation of Commercial Products to Mitigate Swine Manure Foam

Robert, Matthew J; Kasimati, Aikatrini; Clarindo, Anny Carolina; Bragatto, Thais Coser; Funk, T. L.; Gates, Richard S.

doi:10.13031/2013.37182

Cited by 5 publications

(1 citation statement)

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“…Collapse or breakage of the foam can release significant quantities of the trapped gasses, leading to potentially hazardous concentrations of hydrogen sulfide or explosive concentrations of methane in the barn (Moody et al, 2009). In general, foam observed in deep-pit storages is a dark-brown or gray, solidsrich, viscous fluid (Robert et al, 2011) with mid-sized bubbles entrained throughout ( fig. 1).…”

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An Evaluation of the Physicochemical and Biological Characteristics of Foaming Swine Manure

2015

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Foam accumulation in deep-pit manure storages is an increasing concern for swine producers because of the logistical and safety-related problems it creates. To investigate this phenomenon, samples of swine manure were collected over a 13-month period from 58 swine production facilities in Iowa with varying levels of foam accumulation. Samples were tested for a number of physical, chemical, and biological parameters including pH, total and volatile solids, volatile fatty acid concentration, long-chain free fatty acid concentration, biochemical methane potential, methane production rate, surface tension, foaming capacity, and foam stability. Statistical analysis indicated that manure collected from facilities with foam accumulation produced methane at significantly (p < 0.05) faster rates than non-foaming manures (0.148 Â±0.004 and 0.049 Â±0.003 L CH 4 L-1 slurry d-1 , respectively) and consequently had significantly (p < 0.05) greater fluxes of biogas moving through the manure. The biochemical methane production assay suggested that manure from foaming pits had less potential to generate methane (123 Â±9 mL CH 4 g-1 VS) than manure from non-foaming pits (150 Â±9 mL CH 4 g-1 VS), presumably because more of the methane potential had previously been consumed, as indicated by the higher methane production rates. Short-chain fatty acid concentrations were significantly lower in foaming manures (4200 Â±570 mg kg-1) than non-foaming manures (9470 Â±730 mg kg-1). The methane production rate, biochemical methane potential, and short-chain fatty acid assays suggest enhanced anaerobic digestion efficiency from foaming barns as compared to non-foaming barns. Other assays, such as surface tension and foaming capacity, indicated an accumulation of a surfactant at the manure-air interface of the foam, which may be capturing biogas bubbles generated within the manure. Most importantly, the foam layers exhibited a greatly enhanced ability to stabilize bubbles, which appeared to be correlated to the higher solids concentrations that stabilize the bubbles.

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An Evaluation of the Physicochemical and Biological Characteristics of Foaming Swine Manure

2015

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Three-Phase Foam Analysis and the Development of a Lab-Scale Foaming Capacity and Stability Test for Swine Manures

Weelden¹,

Andersen²,

Rosentrater³

et al. 2013

2013 Kansas City, Missouri, July 21 - July 24, 2013

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The Impact of Carbohydrate and Protein Level and Sources on Swine Manure Foaming Properties

Weelden¹,

Andersen²,

Rosentrater³

et al. 2013

2013 Kansas City, Missouri, July 21 - July 24, 2013

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This study explored the impact of swine diet on the composition, methane production potential, and foaming properties of manure. Samples of swine manure were collected from controlled feeding trials with diets varying in protein and carbohydrate levels and sources. Protein sources consisted of corn with amino acids, corn-soybean meal with amino acids, corn-soybean meal, corn-canola meal, corn-corn gluten meal, and cornpoultry meal. Carbohydrate sources consisted of corn-soybean meal, barley, beet pulp, distillers dried grains with solubles (DDGS), soy hulls, and wheat bran. Manure samples were tested for a number of physical and biochemical parameters, including total solids, volatile solids, viscosity, density, methane production rate, biochemical methane potential, foaming capacity, and foam stability. Statistical analyses were performed to evaluate whether different carbohydrate and/or protein ingredients affected these physico-chemical properties or the samplesâ€™ ability to produce methane gas. After conducting these trials, another feeding trial was performed to evaluate if the addition of Narasin into rations (corn-soybean and DDGS) could reduce the methane production rate or potential of the manure. These samples were also tested for the physical and biochemical parameters mentioned previously. Finally, an additional manure foaming study was conducted involving the addition of specific carbohydrates ground to different particle sizes and corn oil to observe the effects that the additives had on foaming capacity and stability.

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Evaluation of Commercial Products to Mitigate Swine Manure Foam

Cited by 5 publications

References 0 publications

An Evaluation of the Physicochemical and Biological Characteristics of Foaming Swine Manure

An Evaluation of the Physicochemical and Biological Characteristics of Foaming Swine Manure

Three-Phase Foam Analysis and the Development of a Lab-Scale Foaming Capacity and Stability Test for Swine Manures

The Impact of Carbohydrate and Protein Level and Sources on Swine Manure Foaming Properties

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