Physical quality of pelleted animal feed 3. Contribution of feedstuff components

Thomas, M.; Vliet, T. van; Poel, A.F.B. van der

doi:10.1016/s0377-8401(97)00072-2

Cited by 223 publications

(147 citation statements)

References 29 publications

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“…Pelleting of diets involves a combination of shear, heat and water that may partially denaturise and improves bioavailability of dietary protein (Voragen et al, 1995;Thomas et al, 1998;Abdollahi et al, 2013). Heating could also improve digestibility of proteins by inactivating enzyme inhibitors and denaturing the protein, which may expose new sites for enzyme attack (Camire et al, 1990).…”

Section: Discussionmentioning

confidence: 99%

Does the effect of pelleting depend on the wheat sample when fed to chickens?

Pirgozliev

Mirza

Rose

2016

animal

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Experimental comparisons of the nutritional value of different wheat cultivars commonly use feeds in meal form even though the largescale broiler producers use steam pelleted feeds. The aim of this experiment was to examine the effect of steam pelleting on the performance, dietary N-corrected apparent metabolisable energy (AMEn), total tract dry matter retention (DMR), nitrogen retention (NR) and fat digestibility (FD) coefficients, and digestive tract development of broilers fed four different wheat samples in complete diets. Four European wheat samples, with different chemical composition and endosperm characteristics, were used in a broiler experiment. The wheat samples were milled through a 5 mm screen and four basal feeds containing 670 g/kg of each selected wheat sample were mixed. The basal feeds were then split into two batches and one of them was steam pelleted resulting in eight experimental diets. Each diet was fed ad libitum to eight pens of two male Ross 308 broilers from 10 to 24 days of age. Feeding pelleted diets improved ( P < 0.001) feed intake and weight gain, and daily water intake of the birds. Pelleting also improved dietary AMEn and FD ( P < 0.001) and DMR ( P < 0.05). An interaction ( P < 0.05) was observed between wheat samples and steam pelleting for NR. Steam pelleting improved ( P < 0.05) NR in the wheat sample with high starch and protein and hard endosperm but not in the rest of the wheat samples. Similar interactions ( P < 0.05) were also observed between wheat sample and steam pelleting for gain to feed (G : F) and water to feed (W : F) ratios. Pelleting improved G : F ratio the greatest in the wheat sample with high starch and protein and hard endosperm. Feeding the same wheat sample also decreased ( P < 0.05) W : F but only in the mash diets. Regardless of the wheat sample the values of dietary AMEn did not differ ( P > 0.05). Feeding different wheat types and pelleting did not ( P > 0.05) change the development of the gastrointestinal tract of the birds. The study showed that there were differences between four wheat samples when they were fed in pelleted complete feed, but no differences were observed when fed in mash form complete diets. Research on the interaction between pelleting and wheat chemical and quality characteristics is warranted.

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Section: Discussionmentioning

confidence: 99%

Does the effect of pelleting depend on the wheat sample when fed to chickens?

Pirgozliev

Mirza

Rose

2016

animal

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“…Understanding the effects of densification process variables on some common chemical constituents like starch, cellulose, hemicellulose, fat, and lipid will help clarify quality parameters, such as moisture content, bulk density, and durability of densified biomass. Thomas et al (1998), in their article on the pelleting of animal feeds, identify starch, protein, sugar and non-starch polysaccharides (NSP), fat, fiber, inorganic matter, and water as some of the important ingredients that influence pellet quality. Bandyopadhyay (2004 and and Shankar et al (2008a) found that the protein and fat in the feed material significantly affect the quality of the extruded feed and also impact flow behavior.…”

Section: Biomass Compositionmentioning

confidence: 99%

“…During gelatinization of the starch granule, amylase immediately forms double helices that may aggregate (hydrogen bonds) to each other, creating semi-crystalline regions and helping in binding. The underlying principles of why and how starch contributes to the binding properties in pellets are yet to be explored (Thomas et al 1998). Starch in food and feed processing is mainly used as a thickener, colloidal stabilizer, gelling agent, bulking agent, water retention agent, and adhesive (Singh et al 2002).…”

Section: Starchmentioning

confidence: 99%

“…Protein that is heated during the densification process undergoes denaturization leading to the formation of new bonds and structures with other proteins, lipids and starch available in the biomass and improves the binding capacity (Thomas et al, 1998 andNyanzi andMaga, 1992).According to Briggs et al (1999) and Wood (1987), increasing the protein content increases pelleted feed durability. Raw protein improves the physical quality of the pellets better than denatured proteins.…”

Section: Proteinmentioning

confidence: 99%

“…Starch present in the biomass acts as binder during densification. During densification of starch-rich biomass using an extrusion process like pelleting, the presence of heat and moisture gelatinizes the starch and results in better binding (Wood 1987;Thomas et al 1998). High temperature and pressure, which are normally encountered during the densification process, results in softening of the lignin and improves the binding ability of the biomass.…”

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confidence: 99%

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A Review on Biomass Densification Technologie for Energy Application

Tumuluru¹,

Wright²

2010

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It is generally acknowledged that burning fossil fuels and deforestation are major contributors to anthropogenic climate change. Biomass from plants can serve as an alternative renewable and carbon-neutral raw material for the production of energy. Low densities of 80-150 kg/m 3 for herbaceous and 150-200 kg/m 3 for woody biomass limit their application in energy production. Prior to cost-effective use in energy applications, these materials need to be densified to increase their bulk densities to help reduce technical limitations associated with storage, loading, and transportation. Pelleting, briquetting, or extrusion processing are methods commonly used to achieve densification. The aim of the present report is a comprehensive review of biomass processing, which includes densification technologies and specific energy consumption, biomass pretreatment methods, densification process modeling, and optimization. The specific objectives include:

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