scholarly journals Changing Wheat Bran Structural Properties by Extrusion-Cooking on a Pilot and Industrial Scale: A Comparative Study

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 472
Author(s):  
Chiara Roye ◽  
Muriel Henrion ◽  
Hélène Chanvrier ◽  
Chrystel Loret ◽  
Roberto King ◽  
...  
Keyword(s):  
Moisture Content ◽  
Wheat Bran ◽  
Mechanical Energy ◽  
Pilot Scale ◽  
Industrial Scale ◽  
Extrusion Cooking ◽  
Double Pass ◽  
Single Pass ◽  
Product Temperature ◽  
Acid Extrusion

Extrusion-cooking can be used to change the techno–functional and nutrition-related properties of wheat bran. In this study, pilot-scale (BC21) and industrial-scale (BC45) twin-screw extrusion-cooking using different types of extrusion (single-pass, double-pass and acid extrusion-cooking) and process parameters (temperature, moisture) were compared for their impact on wheat bran. When applying the same process settings, the higher strong water-binding capacity, extract viscosity and extractability displayed by bran extruded using the industrial set-up reflected a more considerable wheat bran structure degradation compared to pilot-scale extrusion-cooking. This was attributed to the overall higher specific mechanical energy (SME), pressure and product temperature that were reached inside the industrial extruder. When changing the type of extrusion-cooking from single-pass to double-pass and acid extrusion-cooking, wheat bran physicochemical characteristics evolved in the same direction, irrespective of extruder scale. The differences in bran characteristics were, however, smaller on industrial-scale. Results show that the differentiating power of the latter can be increased by decreasing the moisture content and increasing product temperature, beyond what is possible in the pilot-scale extruder. This was confirmed by using a BC72 industrial-scale extruder at low moisture content. In conclusion, the extruder scale mainly determines the SME that can be reached and determines the potential to modify wheat bran.

Single-pass, double-pass and acid twin-screw extrusion-cooking impact physicochemical and nutrition-related properties of wheat bran

2020 ◽  
Vol 66 ◽  
pp. 102520
Author(s):  
Chiara Roye ◽  
Hélène Chanvrier ◽  
Muriel Henrion ◽  
Karlien De Roeck ◽  
Yamina De Bondt ◽  
...  
Keyword(s):  
Wheat Bran ◽  
Extrusion Cooking ◽  
Twin Screw Extrusion ◽  
Double Pass ◽  
Single Pass ◽  
Screw Extrusion ◽  
Twin Screw

scholarly journals Extrusion-Cooking Modifies Physicochemical and Nutrition-Related Properties of Wheat Bran

Foods ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 738 ◽  
Author(s):  
Chiara Roye ◽  
Muriel Henrion ◽  
Hélène Chanvrier ◽  
Karlien De Roeck ◽  
Yamina De Bondt ◽  
...  
Keyword(s):  
Moisture Content ◽  
Wheat Bran ◽  
Mechanical Energy ◽  
Physicochemical Characteristics ◽  
Extrusion Cooking ◽  
Fatty Acid Production ◽  
Phytate Degradation ◽  
Structure Degradation ◽  
Twin Screw ◽  
Specific Mechanical Energy

The potential of extrusion-cooking to change the physicochemical characteristics of wheat bran, increase its nutritional value and decrease its recalcitrance towards fermentation was investigated in this study. The conditions in a twin-screw extruder were varied by changing screw configuration, moisture content and barrel temperature. The former was not previously investigated in studies on bran extrusion. Extrusion-cooking resulted in an increased water-holding capacity and extract viscosity of bran, suggesting shear-induced structure degradation and structure loosening due to steam explosion at the extruder outlet. Modelling showed that the extent of these modifications mainly correlates with the amount of specific mechanical energy (SME) input, which increases with an increasing number of work sections in the screw configuration and a decreasing moisture content and barrel temperature. Extrusion led to solubilisation of arabinoxylan and ferulic acid. Moreover, it led to starch melting and phytate degradation. Upon fermentation of the most modified sample using a human faecal inoculum, small numeric pH decreases and short-chain fatty acid production increases were observed compared to the control bran, while protein fermentation was decreased. Overall, extrusion-cooking can improve the nutrition-related properties of wheat bran, making it an interesting technique for the modification of bran before further use or consumption as an extruded end product.

scholarly journals Energy Consumption and Process Efficiency as Affected by Extrusion-Cooking Conditions and Recipe Formulation During the Production of Gluten-Free Rice-Legumes Products

2017 ◽  
Vol 21 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Abdallah Bouasla ◽  
Agnieszka Wójtowicz ◽  
Stanisław Juśko ◽  
Mohammed Nasreddine Zidoune
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Raw Materials ◽  
Mechanical Energy ◽  
Process Efficiency ◽  
Extrusion Cooking ◽  
Gluten Free ◽  
Screw Speed ◽  
Specific Mechanical Energy ◽  
Cooking Conditions

Abstract The objective of the study was to determine the effect of extrusioncooking conditions (moisture content and screw speed) and recipe formulation on process efficiency and energy consumption during the extrusion-cooking of gluten-free rice-legumes products, shaped for spaghetti-type pasta. Process efficiency (Q) was determined through measurement of the pasta weight and energy consumption was determined using specific mechanical energy consumption (SME). According to the obtained results, screw speed had a great significant impact on Q and SME values which increased as screw speed increased. Moisture content of raw materials had also a significant effect on Q and SME mainly at low screw speed applied. The process efficiency increased with the increase of raw materials moisture content while reverse observations were noted for the energy consumption. On the contrary, variations of recipe formulations did not affect the measured parameters.

Flattop Broadband Wavelength Conversion Based on Cascaded Second-Harmonic Generation and Difference Frequency Generation in Step-Segmented Quasi-Phase Matched Gratings

2014 ◽  
Vol 989-994 ◽  
pp. 3790-3793
Author(s):  
Hai Dong Wu ◽  
Jin Song Guo ◽  
Yun Wen Wu ◽  
Zhao Xia Wang
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Wavelength Conversion ◽  
Second Harmonic ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Double Pass ◽  
Single Pass ◽  
Frequency Generation ◽  
Matching Response

Bandwidth enhancement and response flattening of wavelength conversion based on single-pass and double-pass cascaded second harmonic generation and difference frequency generation in step-segmented quasi-phase matched (QPM) gratings are investigated. For the same waveguide length, high conversion efficiency, flat response and broad signal bandwidth can be obtained simultaneously by optimizing the poling period of the step-segmented QPM structure. The conversion bandwidths in a 3-cm-long five-step-segmented waveguide are 134 nm for single-pass scheme and 132 nm for the double-pass one, respectively, which are both over the whole conventional band and long-wavelength band. The ripple on the matching response can keeps less than 0.2 dB as well.

Evaluating the Performance of a Modified Solar Air Heater With Pierced Cover and Packed Mesh Layers

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Raheleh Nowzari ◽  
Hasan Saygin ◽  
L.B.Y. Aldabbagh
Keyword(s):  
Airflow Rate ◽  
Solar Air Heater ◽  
Centrifugal Fan ◽  
Construction Costs ◽  
Double Pass ◽  
Counter Flow ◽  
Single Pass ◽  
Air Heater ◽  
Current Design ◽  
Thermohydraulic Efficiency

Abstract An experimental study was conducted to evaluate the thermal efficiency of a modified solar air heater. In the current design, air enters the collector through holes in front glass, passes through mesh layers, and exits at the backside of the air heater. A centrifugal fan was used to circulate air through the system. The design offers low construction costs and less solar radiation reflected from the collector. The modified collector was examined with various bed heights (30, 50, and 70 mm) and different mass flowrates of air varying from 0.011 kg/(s m2) to 0.043 kg/(s m2). The results showed that a counter flow collector with pierced cover had 5.6–9.7% higher efficiency than the single-pass one. The average efficiencies of the current design collector were found to be 55.2%, 44.6%, and 39.7% for the single-pass and 60.8%, 50.9% and 45.4% for the double-pass collector at 30, 50, and 70 mm bed heights and airflow rate of 0.043 kg/(s m2), respectively. The thermohydraulic efficiency, temperature difference, and perforated cover surface temperature were analyzed at each test and their effects on the system performance were evaluated. The highest amount of pressure drop through the collector was measured in the collector with a 70-mm bed height and a maximum air flowrate.

scholarly journals OPTIMIZATION OF THE 1050nm PUMP POWER AND FIBER LENGTH IN SINGLE-PASS AND DOUBLE-PASS THULIUM DOPED FIBER AMPLIFIERS

2009 ◽  
Vol 14 ◽  
pp. 431-448 ◽  
Author(s):  
Siamak Dawazdah Emami ◽  
Sulaiman Wadi Harun ◽  
Faidz Abd-Rahman ◽  
Hairul Azhar Abdul-Rashid ◽  
Siti Aida Daud ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Length ◽  
Fiber Amplifiers ◽  
Double Pass ◽  
Single Pass
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