scholarly journals The Effects of Hammer Mill Screen Size on Ground Corn Particle Size, Pellet Durability, and Broiler Performance

1986 ◽  
Vol 65 (7) ◽  
pp. 1257-1261 ◽  
Author(s):  
F.N. REECE ◽  
B.D. LOTT ◽  
J.W. DEATON
Keyword(s):  
Particle Size ◽  
Hammer Mill ◽  
Screen Size ◽  
Broiler Performance ◽  
Ground Corn ◽  
Corn Particle Size

scholarly journals Effects of processing, moisture, and storage length on the fermentation profile, particle size, and ruminal disappearance of reconstituted corn grain

2020 ◽  
Vol 98 (11) ◽  
Author(s):  
Ana L M Gomes ◽  
Antonio V I Bueno ◽  
Fernando A Jacovaci ◽  
Guilherme Donadel ◽  
Luiz F Ferraretto ◽  
...  
Keyword(s):  
Particle Size ◽  
Lactic Acid ◽  
Butyric Acid ◽  
Hammer Mill ◽  
Moisture Concentration ◽  
Fermentation Profile ◽  
And Storage ◽  
Ground Corn ◽  
Corn Grain

Abstract Our objective was to examine the effects of processing, moisture, and anaerobic storage length of reconstituted corn grain (RCG) on the fermentation profile, geometric mean particle size (GMPS), and ruminal dry matter disappearance (DMD). Dry corn kernels were ground (hammer mill, 5-mm screen) or rolled, then rehydrated to 30%, 35%, or 40% moisture, and stored for 0, 14, 30, 60, 90, 120, or 180 d in laboratory silos. Rolled corn had an increased GMPS compared with ground corn (2.24 and 1.13 mm, respectively, at ensiling). However, there was a trend for an interaction between processing and moisture concentration to affect particle size, with GMPS increasing with increased moisture concentration, especially in ground corn. Longer storage periods also slightly increased GMPS. Processing, moisture, and storage length interacted to affect the fermentation pattern (two- or three-way interactions). Overall, pH decreased, whereas lactic acid, acetic acid, ethanol, and NH3-N increased with storage length. RCG with 30% moisture had less lactic acid than corn with 35% and 40% moisture, indicating that fermentation might have been curtailed and also due to the clostridial fermentation that converts lactic acid to butyric acid. Ensiling reconstituted ground corn with 30% of moisture led to greater concentrations of ethanol and butyric acid, resulting in greater DM loss than grain rehydrated to 35% or 40% of moisture. Ammonia-N and in situ ruminal DMD were highest for reconstituted ground corn with 35% or 40% of moisture, mainly after 60 d of storage. Therefore, longer storage periods and greater moisture contents did not offset the negative effect of greater particle size on the in situ ruminal DMD of rolled RCG. Nonetheless, RCG should be ensiled with more than 30% moisture and stored for at least 2 mo to improve the ruminal DMD and reduce the formation of ethanol and butyric acid.

Influence of particle size and microbial phytase supplementation on the performance, nutrient utilisation and digestive tract parameters of broiler starters

2009 ◽  
Vol 49 (8) ◽  
pp. 704 ◽  
Author(s):  
A. M. Amerah ◽  
V. Ravindran
Keyword(s):  
Particle Size ◽  
Weight Gain ◽  
Digestive Tract ◽  
Feed Intake ◽  
Coarse Particle ◽  
Hammer Mill ◽  
Particle Sizes ◽  
Broiler Performance ◽  
Nutrient Utilisation ◽  
Microbial Phytase

The aim of the present experiment was to examine the interaction between particle size and microbial phytase supplementation on the performance, nutrient utilisation and digestive tract development of broiler starters fed maize-based diets. The experimental design was a 2 × 2 factorial arrangement of treatments evaluating two maize particle sizes (medium and coarse) and two levels of phytase supplementation (without or with 500 phytase units/kg diet). The two particle sizes were achieved by grinding the whole maize in a hammer mill to pass through 3- and 7-mm screens, respectively. Broiler starter diets, based on maize and soybean meal, were formulated to meet recommended requirements for major nutrients, except phosphorus. Each of the four diets was fed ad libitum to six pens of eight male broilers each, from day 1 to day 21 post-hatching. Phytase supplementation increased (P < 0.001) the feed intake and weight gain, and lowered (P < 0.05) feed per gain in both medium and coarse particle size diets. Coarse grinding improved (P < 0.05) weight gain, but had no effect (P > 0.05) on feed intake and feed per gain. No interactions (P > 0.05) between phytase supplementation and particle size were observed for any of the performance parameters. Phytase supplementation increased (P < 0.001) ileal phosphorus digestibility and toe ash content of birds fed the medium particle size diet, but had no effect in those fed the coarse particle size diet. Apparent metabolisable energy and ileal digestibility of calcium and nitrogen were not influenced by particle size or phytase supplementation. The present findings suggest that the effectiveness of supplemental phytase on broiler performance is not influenced by the particle size of maize.

scholarly journals The Effect of Temperature, Dietary Energy Level, and Corn Particle Size on Broiler Performance

1992 ◽  
Vol 71 (4) ◽  
pp. 618-624 ◽  
Author(s):  
B.D. LOTT ◽  
E.J. DAY ◽  
J.W. DEATON ◽  
J.D. MAY
Keyword(s):  
Particle Size ◽  
Energy Level ◽  
Effect Of Temperature ◽  
Dietary Energy ◽  
Broiler Performance ◽  
Corn Particle Size

scholarly journals Effect of Corn Particle Size and Pellet Texture on Broiler Performance in the Growing Phase

2006 ◽  
Vol 15 (2) ◽  
pp. 245-255 ◽  
Author(s):  
A.S. Parsons ◽  
N.P. Buchanan ◽  
K.P. Blemings ◽  
M.E. Wilson ◽  
J.S. Moritz
Keyword(s):  
Particle Size ◽  
Broiler Performance ◽  
Corn Particle Size

scholarly journals The impacts of hammer-mill screen size and grain particle size on the performance of broiler chickens offered diets based on two red sorghum varieties

2016 ◽  
Vol 60 (3) ◽  
pp. 209-218 ◽  
Author(s):  
P. H. Selle ◽  
H. H. Truong ◽  
A. Khoddami ◽  
A. F. Moss ◽  
T. H. Roberts ◽  
...  
Keyword(s):  
Particle Size ◽  
Broiler Chickens ◽  
Hammer Mill ◽  
Screen Size

scholarly journals Effects of Grinding Corn with Different Moisture Content on Subsequent Particle Size and Flowability

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1372
Author(s):  
Michaela Braun ◽  
Kara Dunmire ◽  
Caitlin Evans ◽  
Charles Stark ◽  
Jason Woodworth ◽  
...  
Keyword(s):  
Particle Size ◽  
Standard Deviation ◽  
Moisture Content ◽  
Angle Of Repose ◽  
Moisture Loss ◽  
Orifice Diameter ◽  
Flow Index ◽  
Screen Size ◽  
Size Standard ◽  
Ground Corn

The objective of this study was to determine the effects of whole-corn moisture and hammermill screen size on subsequent ground corn moisture, particle size and flowability. Treatments were arranged as a 2 × 2 factorial design with two moisture concentrations (14.5 and 16.7%), each ground using 2 hammermill screen sizes (3 mm and 6 mm). Corn was ground using a lab-scale 1.5 HP Bliss Hammermill at three separate timepoints to create three replications per treatment. Ground corn flowability was calculated using angle of repose (AOR), percent compressibility, and critical orifice diameter (COD) measurements to determine the composite flow index (CFI). There was no evidence for a screen size × corn moisture interaction for ground corn moisture content (MC), particle size, standard deviation, or flowability metrics. Grinding corn using a 3 mm screen resulted in decreased (p < 0.041) moisture content compared to corn ground using the 6 mm screen. There was a decrease (p < 0.031) in particle size from the 6 mm screen to the 3 mm, but no evidence of difference was observed for the standard deviation. There was a decrease (p < 0.030) in percent compressibility as screen size increased from 3 mm to 6 mm. Angle of repose tended to decrease (p < 0.056) when corn was ground using a 6 mm screen compared to a 3 mm screen. For the main effects of MC, 16.7% moisture corn had increased (p < 0.001) ground corn MC compared to 14.5%. The 14.5% moisture corn resulted in decreased (p < 0.050) particle size and an increased standard deviation compared to the 16.7% moisture corn. The increased MC of corn increased (p < 0.038) CFI and tended to decrease (p < 0.050) AOR and COD. In conclusion, decreasing hammermill screen size increased moisture loss by 0.55%, decreased corn particle size by 126 µm and resulted in poorer flowability as measured by percent compressibility and AOR. The higher moisture corn increased subsequent particle size by 89 µm and had improved flowability as measured by CFI.

scholarly journals Effects of corn particle size on broiler performance during the starter, grower, and finisher periods

2020 ◽  
Vol 29 (2) ◽  
pp. 352-361
Author(s):  
A.A. Rubio ◽  
J.B. Hess ◽  
W.D. Berry ◽  
W.A. Dozier ◽  
W.J. Pacheco
Keyword(s):  
Particle Size ◽  
Broiler Performance ◽  
Corn Particle Size

Effects of Ground Corn Particle Size on Ethanol Yield and Thin Stillage Soluble Solids

2007 ◽  
Vol 84 (1) ◽  
pp. 6-9 ◽  
Author(s):  
Kalpana Naidu ◽  
Vijay Singh ◽  
David B. Johnston ◽  
Kent D. Rausch ◽  
M. E. Tumbleson
Keyword(s):  
Particle Size ◽  
Ethanol Yield ◽  
Soluble Solids ◽  
Thin Stillage ◽  
Ground Corn ◽  
Corn Particle Size

scholarly journals Evaluation of Hammermill Tip Speed, Air Assist and Screen Hole Diameter on Ground Corn Characteristics

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1768
Author(s):  
Michaela Braun ◽  
Haley Wecker ◽  
Kara Dunmire ◽  
Caitlin Evans ◽  
Michael W. Sodak ◽  
...  
Keyword(s):  
Particle Size ◽  
Geometric Mean ◽  
Air Flow ◽  
Hole Diameter ◽  
Flow Index ◽  
Air Flow Rate ◽  
Screen Size ◽  
Flow Rates ◽  
Composite Flow ◽  
Ground Corn

This study was performed to evaluate hammermill tip speed, assistive airflow, and screen hole diameter on hammermill throughput and characteristics of ground corn. Corn was ground using two Andritz hammermills measuring 1 m in diameter each equipped with 72 hammers and 300 HP motors. Treatments were arranged in a 3 × 3 × 3 factorial design with three tip speeds (3774, 4975, and 6176 m/min), three screen hole diameters (2.3, 3.9, and 6.3 mm), and three air flow rates (1062, 1416, and 1770 fan revolutions per minute). Corn was ground on three separate days to create three replications and treatments were randomized within day. Samples were collected and analyzed for moisture, particle size, and flowability characteristics. There was a 3-way interaction (p = 0.029) for standard deviation (Sgw). There was a screen hole diameter × hammer tip speed interaction (p < 0.001) for geometric mean particle size dgw (p < 0.001) and composite flow index (CFI) (p < 0.001). When tip speed increased from 3774 to 6176 m/min, the rate of decrease in dgw was greater as screen hole diameter increased from 2.3 to 6.3 mm. For CFI, increasing tip speed decreased the CFI of ground corn when ground using the 3.9 and 6.3 mm screen. However, when grinding corn using the 2.3 mm screen, there was no evidence of difference in CFI when increasing tip speed. In conclusion, the air flow rate did not influence dgw of corn, but hammer tip speed and screen size were altered and achieved a range of dgw from 304 to 617 µm.

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