The Effective Parameters on the Separation of Wild Oat (Avena Fatua) from Wheat Mass using a Gravity Separator

AgaAzizi, Saeed; Rasekh, Mansor; Abbaspour Gilandeh, Yousef; Kianmehr, Mohamadhosein

doi:10.22092/erams.2019.125535.1301

Document Type : Original Article

Authors

¹ Ph.D. Candidate, Department of Biosystems Engineering, Faculty of Agricultural Technology and Natural Resources, University of Mohaghegh Ardabili, Ardibil, Iran

² Associate Professor, Department of Biosystems Engineering, Faculty of Agricultural Technology and Natural Resources, University of Mohaghegh Ardabili, Ardibil, Iran

³ Professor, Department of Biosystems Engineering, Faculty of Agricultural Technology and Natural Resources, University of Mohaghegh Ardabili, Ardibil, Iran

https://doi.org/10.22092/erams.2019.125535.1301

Abstract

Wild oat (Avena fatua) is the most common weed of wheat fields. Given that the presence of even small amounts of wild oat in the wheat grain mass may lead to a sharp drop in the quality of flour produced, separation of wild oat from wheat will increase the purity of the seed and enhance the economic value of the crop. In present study, some physical properties of wheat and wild oat, including geometric properties, gravity properties, frictional properties and initial moisture content were determened. A gravity separator - equipped with some tools to adjust five parameters: air flow rate, frequency of oscillation, amplitude of oscillation, longitudinal slope and latitudinal slope of the table - was used to separate wild oats from wheat grain mass. The effects of these parameters were studied to achieve maximum separation of wild oat from wheat mass. Statistical analyses were performed in two factorial experiments in a completely randomized design. Also, using dimensional analysis, a dimensionless dimensional parameter V/aω was obtained (where v is air speed, a is oscillation and ω is oscillation frequency), which was effective in evaluating the effect and reducing the number of parameters. The results showed significant differences (1%) in moisture content, mass and particle density, boundary velocity and interaction between grain type and friction surface between two grain types. Also, the results indicated that the maximum separation of wild oats from wheat (70.47%) was obtained when the air flow rate was 6 m/s, the oscillation was 5 mm, the oscillation frequency was 395 cycl/min,, and the longitudinal slope and latitudinal slope were 2.5° and 1.5°, respectively.

Keywords

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Agricultural Mechanization and Systems Research

The Effective Parameters on the Separation of Wild Oat (Avena Fatua) from Wheat Mass using a Gravity Separator

References

References

Volume 21, Issue 76 - Serial Number 76
January 2021
Pages 1-16

The Effective Parameters on the Separation of Wild Oat (Avena Fatua) from Wheat Mass using a Gravity Separator

References

References

Volume 21, Issue 76 - Serial Number 76January 2021Pages 1-16

Volume 21, Issue 76 - Serial Number 76
January 2021
Pages 1-16