Determination of Dockage for Accurate Rough Rice Quality Assessment

Atungulu, Griffiths G.; Prakash, B. G.; Wang, Xiaotuo; Wang, Tianxin; Fu, Ruipeng; Khir, Ragab; Pan, Zhongli

doi:10.13031/2013.42640

Cited by 6 publications

(2 citation statements)

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“…While ARA-1 (3.43%) showed a similar water uptake rate as check 1 (3.25%) (Table 1). The high water uptake of rice samples ARA-2, ARA-5, ARA-18, ARA-23 and control 2 could be explained by the fact that they are characterized by harder grains than the other rice samples [16,17].…”

Section: Physico-chemical Characteristics Of White and Parboiled Arom...mentioning

confidence: 99%

Physicochemical and Sensory Characterization of Five Promising Aromatic Rice Accessions in Benin

DANSOU,

HOUSSOU,

KOUKE

et al. 2023

FENS

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Rice Research program of the National Institute of Agricultural Research of Benin (INRAB)has selected five romising aromatic rice accessions in terms of yield performance, resistance to diseases and climate change but their quality is not yet known for a better utilization, hence the objective of this present study. Thus, five promising aromatic rice accessions ARA-1, ARA-2, ARA-5, ARA-18 and ARA-23 and two released aromatic rice varieties used as check (IR 841 and BRIZ 10B) were collected in three localities (Covê, Glazoué and Malanville). Physico-chemical and nutritional characteristics of the rice samples were evaluated using standard methods. The sensory quality was evaluated by a panel of rice farmers. Results showed that the ash contents of white rice varied significantly (P<0.05) whatever accessions and highest values was obtained for accessions ARA-18 (0.70%) and ARA-23 (0.76%) and the lowest for ARA-1 (0.51%) and IR 841 (0.51%). For parboiled rice, ARA-18 (0.82%) and ARA-23 (0.85%) presented the highest ash contents while (0.55%) and ARA-5 (0 .66%) the lowest one. Protein contents varied from 7.50% to 8.76% for white rice and from 9.5% to 10.9% for parboiled rice. Parboiled type of accessions ARA-1 (3), ARA-2 (3), ARA-5 (4) and are characterized by high gelatinization temperature (75oC -79oC) like that of parboiled type of BRIZ 10B (2). Aromatic rice accessions and checks were characterized by high level of homogeneity rate (>85%) and low (0.1 to 10%) uniformity presence of starch as well as white and parboiled rice. No significant difference (P>0.05) was observed between the swelling rates of the white and parboiled rice samples. Parboiled cooked rice (ARA-2 and ARA-5) and white cooked rice (ARA-2, ARA-18 and ARA-5) were respectively most appreciated by 70% and 65% of the panelist compared to the parboiled and white cooked check varieties, above all because of their high roma, attractive colour, non-sticky appearance and very pleasant taste.

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Section: Physico-chemical Characteristics Of White and Parboiled Arom...mentioning

confidence: 99%

Physicochemical and Sensory Characterization of Five Promising Aromatic Rice Accessions in Benin

DANSOU,

HOUSSOU,

KOUKE

et al. 2023

FENS

View full text Add to dashboard Cite

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“…Under the load of the grain, the shearing stress on the contact surface of the grains overcomes the frictional force between them, causing the grains to slide along the contact surface and resulting in an anisotropic distribution of the porosity of the grain pile (Nourmohamadi‐Moghadami, Zare, Singh, & Stroshine, 2020; Nourmohamadi‐Moghadami, Zare, Stroshine, & Kamfiroozi, 2020). During the aeration process, the lower porosity of the crushed grain accumulation site below the discharge port leads to a decrease in the airflow velocity through this position, thereby creating a zone of thermal and humid accumulation (Atungulu et al, 2013; Bartosik & Maier, 2006). Furthermore, crushed grains are more susceptible to insect and mold infestations, which can pro‐mote localized heating in the grain pile (Coradi et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

An improved anisotropic continuum model for the flow and heat transfer in grain aeration system

Liu

Chen

Zheng

et al. 2023

J Food Process Engineering

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To investigate the influence of pore structure distribution on the flow and heat transfer during the aeration process of a grain pile, an anisotropic continuous model (ACM) was developed based on the homogeneous continuous model (HCM). The improved ACM includes spatial resistance factors and effective thermal conductivity correction coefficients. The experimental results were compared with the particle‐resolved computational fluid dynamics (PRCFD) and ACM simulation results to verify the accuracy. At higher inlet velocities, the HCM underestimated the pressure drop in the wheat fixed bed, with an average deviation of 21%. In contrast, the improved ACM incorporates the effect of resistance factors and had an average deviation of less than 10% from the experimental. By simulating the pilot‐scale bin aeration system, the accuracy of the improved ACM applied to the real bin was ensured, considering the change in the porosity of the grain pile along the center of the bin to the bin wall and the grain pile height direction. The range of variable porosity distribution was set at .35–.45, and the total average deviation between the ACM simulation static pressure and the experimental value was 9.7% when the inlet airflow velocity was .019 m/s. The simulated temperature of the ACM matches the measured temperature better compared to the temperature values of the grain pile at different heights in the HCM with a constant porosity of .45. Therefore, the impact of four central air collection duct forms on airflow and temperature was discussed, and it was determined that the pipe with a larger diameter at the top and a smaller diameter at the bottom air collection duct was more advantageous when used in a horizontal aeration system by applying the improved ACM to different scenarios.Practical ApplicationsThis study introduces the resistance factor and effective thermal conductivity in a laboratory‐scale fixed bed of wheat. An improved anisotropic continuous model was established for simulating the flow and heat transfer in the fixed bed during the aeration process. The improved anisotropic continuous model accurately reflected the non‐uniformity of fixed bed flow and temperature transfer in the fixed bed. This model can be employed for simulating flow and heat transfer in large‐scale actual storage systems characterized by heterogeneous pore distribution, while ensuring appropriate computational efficiency and precision.

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