Grinding performance and physical properties of wheat and barley straws, corn stover and switchgrass

Mani, Sudhagar; Tabil, Lope G.; Sokhansanj, Shahab

doi:10.1016/j.biombioe.2004.03.007

Cited by 579 publications

(381 citation statements)

References 8 publications

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“…The skewed particle size distribution of coconut flours is typical for naturally occurring particle populations (Rhodes, 1998). A similar response has been reported for alfalfa, wheat straw, barley straw, and corn stover grinds (Mani et al, 2004;Yang et al, 1996).The geometric mean diameter of coconut milk residue flour and VCO cake flour were 524.8±10.7 and 594.6±5.6 µm, respectively. VCO cake flour is expected to have slightly The values after ±are standard deviation at α = 0.05.…”

Section: Resultssupporting

confidence: 83%

Flow-specific physical properties of coconut flours

Manikantan¹,

Ambrose²,

Alavi³

2015

International Agrophysics

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A b s t r a c t. Coconut milk residue and virgin coconut oil cake are important co-products of virgin coconut oil that are used in the animal feed industry. Flour from these products has a number of potential human health benefits and can be used in different food formulations. The objective of this study was to find out the flow-specific physical properties of coconut flours at three moisture levels. Coconut milk residue flour with 4.53 to 8.18% moisture content (w.b.) had bulk density and tapped density of 317.37 to 312.65 and 371.44 to 377.23 kg m -3 , respectively; the corresponding values for virgin coconut oil cake flour with 3.85 to 7.98% moisture content (wet basis) were 611.22 to 608.68 and 663.55 to 672.93 kg m -3 , respectively. The compressibility index and Hausner ratio increased with moisture. The angle of repose increased with moisture and ranged from 34.12 to 36.20 and 21.07 to 23.82 o for coconut milk residue flour and virgin coconut oil cake flour, respectively. The coefficient of static and rolling friction increased with moisture for all test surfaces, with the plywood offering more resistance to flow than other test surfaces.

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Section: Resultssupporting

confidence: 83%

Flow-specific physical properties of coconut flours

Manikantan¹,

Ambrose²,

Alavi³

2015

International Agrophysics

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“…This study indicated that using large hammer mill screen size in appropriate combination with other material and process variables could help to produce good quality briquettes, which might reduce the production cost. Mani et al [45], Kaliyan and Morey [7], and Tumuluru et al [20] reported that the energy consumption for grinding increases exponentially as the screen size becomes smaller. Because a briquette is used for direct combustion, a large screen size (25 to 32 mm) can be used for briquette formation, while avoiding the high cost of grinding.…”

Section: Discussionmentioning

confidence: 99%

Impact of process conditions on the density and durability of wheat, oat, canola, and barley straw briquettes

et al. 2014

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The present study is to understand the impact of process conditions on the quality attributes of wheat oat, barley, and canola straw briquettes. Analysis of variance indicated that briquette moisture content and initial density immediately after compaction and final density after 2 weeks of storage are strong functions of feedstock moisture content and compression pressure, whereas durability rating is influenced by die temperature and feedstock moisture content. Briquettes produced at a low feedstock moisture content of 9 % (w.b.) yielded maximum densities >700 kg/m 3 for wheat, oat, canola, and barley straws. Lower feedstock moisture content of <10 % (w.b.) and higher die temperatures >110°C and compression pressure >10 MPa minimized the briquette moisture content and maximized densities and durability rating based on surface plots observations. Optimal process conditions indicated that a low feedstock moisture content of about 9 % (w.b.), high die temperature of 120-130°C, medium-to-large hammer mill screen sizes of about 24 to 31.75 mm, and low to high compression pressures of 7.5 to 12.5 MPa minimized briquette moisture content to <8 % (w.b.) and maximized density to >700 kg/m 3 . Durability rating >90 % is achievable at higher die temperatures of >123°C, lower to medium feedstock moisture contents of 9 to 12 % (w.b.), low to high compression pressures of 7.5 to 12.5 MPa, and large hammer mill screen size of 31.75 mm, except for canola where a lower compression pressure of 7.5 to 8.5 MPa and a smaller hammer mill screen size of 19 mm for oat maximized the durability rating values.

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“…The first essential step in grinding experiments, CM2mm (760 µm), has comparable to ordinary particle size decline on biomass (0.2-2 mm) as reviewed [89]. Its median particle has also similar to those observed [44] and [58] using a high sized sieve-grinder (3.2 mm-hammer mill) showed suitable particle sizes ~760 and 640 µm. Ball milling disrupted partially the crystalline structure of cellulose.…”

Section: Physicalmentioning

confidence: 62%

Pretreatments to Enhance the Digestibility of Wheat Straw

Zahoor

2014

IJRSE

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Abstract:Wheat straw is a sufficient agricultural by-product with a low market price. The biofuel produced from lignocellulosic material exhibits energetic, economic and environmental benefits in contrast to bio-ethanol from starch or sugar. Until now, physical and chemical difficulty caused by the close connection of the main components of lignocellulosic biomass, discourage the hydrolysis of cellulose and hemicellulose to fermentable sugars. The main purpose of pretreatment is to enhance the enzyme accessibility improving digestibility of cellulose. Every pretreatment has a particular effect on the fraction of cellulose, hemicellulose and lignin, thus different pretreatment methods and conditions should be selected for the development of subsequent hydrolysis and fermentation steps. This paper reviews the most importance technologies for ethanol production from lignocellulose and its represent several vital qualities that should be marked for low-price and promote pretreatment processes.

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Grinding performance and physical properties of wheat and barley straws, corn stover and switchgrass

Cited by 579 publications

References 8 publications

Flow-specific physical properties of coconut flours

Flow-specific physical properties of coconut flours

Impact of process conditions on the density and durability of wheat, oat, canola, and barley straw briquettes

Pretreatments to Enhance the Digestibility of Wheat Straw

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