Pearling barley to alter the composition of the raw material before brewing

Donkelaar, L.H.G. van; Noordman, T.R.; Boom, R.M.; Goot, Atze Jan van der

doi:10.1016/j.jfoodeng.2014.10.024

Cited by 20 publications

(10 citation statements)

References 37 publications

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“…The FAN concentrations decreased with increasing barley concentrations, which is in line with literature reports . No effect of the degree of pearling was observed, which suggests that the protein present in the outer 10% of barley, which is about 8% of the total protein present in barley , did not significantly contribute to the FAN content in the wort. FAN is necessary for the yeast for fermentation.…”

Section: Resultssupporting

confidence: 91%

“…However, the total arabinose, total xylose and arabinoxylan contents of the mashes were not influenced by any of the process variations, even though when the outer 5% of barley is removed, about 15% of the arabinoxylans are removed. Pearling away the outer 10% takes away about 33% of total arabinoxylans . This decrease is not observed in the wort because only a small part of the arabinoxylans is water‐soluble .…”

Section: Resultsmentioning

confidence: 98%

“…The total fermentable sugars were not influenced by filter type but decreased with an increasing amount of barley and with the degree of pearling. This was not expected, as only a minimal amount of starch was pearled off . The lower fermentable sugars might, however, be caused by the milling procedure, as milling pearled material gives different particle sizes and particle composition.…”

Section: Resultsmentioning

confidence: 99%

“…Pearling, an abrasive milling method, has been proposed as a treatment for barley to remove some of its undesired components . Van Donkelaar et al showed that pearling to a degree of 5% reduced the insoluble arabinoxylan content by 15%, the insoluble fibre content by 23% and the water‐holding capacity of the non‐starch components by 25%. It also reduced the ash content by 19% and the polyphenol content by 11%, while only 0.20% of the starch was removed.…”

Section: Introductionmentioning

confidence: 99%

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Combining unmalted barley and pearling gives good quality brewing

et al. 2016

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Brewing with unmalted barley can reduce the use of raw materials, thereby increasing the efficiency of the brewing process. However, unmalted barley contains several undesired components for brewing and has a low enzymatic activity. Pearling, an abrasive milling method, has been proposed as a pre‐treatment for barley to remove some of its undesired components, while maintaining its β‐amylase activity. The potential of combining pearling with using barley/malt mixtures for brewing was studied. Filtration was performed either in a mash filter or in a lauter tun. The effects of the different barley/malt ratios, degree of pearling and two different filter types on compositional and quality parameters were assessed. It was concluded that a mash filter is optimal for this type of process, and a window of operation could be identified in which optimal use is made of the raw materials while maintaining the end product quality, judged on basis of four quality parameters. Copyright © 2016 The Institute of Brewing & Distilling

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combining unmalted barley and pearling gives good quality brewing

et al. 2016

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“…Apparently, it is worth noting that the raw material (barley grain) produces a very high amount of barley grain waste, posing a major environmental concern. As noted by Van Donkelaar et al [3], this waste byproduct contributes to 60% biochemical oxygen demand (BOD) as well as suspended solids. Many methods have been employed by industrialists and agriculturalists to dispose of this waste, one of which is the conventional landfilling process.…”

Section: Introductionmentioning

confidence: 97%

Synthesizing Nano Silica Nanoparticles from Barley Grain Waste: Effect of Temperature on Mechanical Properties

Akhayere¹,

Kavaz²,

Vaseashta³

2019

Pol. J. Environ. Stud.

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In this investigation we report the synthesis of nano silica (NS) nanoparticles from barley grass waste-an environmental burden-using varying temperatures during preparation. The temperatures used during the investigation were 400, 500, 600, and 700ºC, and we studied its effects on the mechanical properties of the NS nanoparticles for use in environmentally friendly applications. Furthermore, the NS nanoparticles resulting from high temperature synthesis were characterized using various characterization methodologies such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) analysis, Brunauer-Emmett-Teller (BET), Fourier transform infrared (FTIR) and X-ray fluorescence (XRF) spectrometry analysis. The result of the various characterizations revealed the presence of elemental Si, C, and O in the synthesized nanoparticles. Using XRF, we observed that higher amounts of SiO 2 particles from NS were obtained at 600ºC and 700ºC, also resulting in higher strength in the mechanical properties. Furthermore, using the Brunauer-Emmett-Teller (BET) methodology, we were able to measure the surface area corresponding to 150 m 2 /g. Additional methodologies were used, such as differential scanning calorimetric (DSC), thermo gravimetric analysis (TGA), SEM, and tensile analysis. The results of this study showed improved and stable mechanical properties with the increase in temperature during synthesis.

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