Optimization of Roller Speed And Feed Rate of Mini Dhal Mill for Hulling Efficiency of Pigeonpea

P. R. Mathukia^*, V. P. Sangani and R. K. Mathukia

College of Agricultural Engineering and Technology, Junagadh Agricultural University, Junagadh-362001 (Gujarat, India).

Pigeonpea is mostly consumed in the form of splits, and it provides a good source of proteins. An abrasive carborundum roller cylindrical mill was generally used in small scale to dehusk and splits pulse grains to make dhal. The independent milling parameters of laboratory scale dhal mill were roller speed and feed rate. The oil treatments to the pigeonpea grains were given after pitting. The milling parameters were (i) roller speed (1000, 1200 and 1400 rpm) (ii) feed rate (50, 60, 70 and 80 kg/h). Two factor completely randomized design was used to optimize the hulling efficiency. Roller speed and feed rate showed significantly effect on the hulling efficiency. The maximum hulling efficiency of 73.53% was found with 1400 rpm roller speed and 60 kg/h feed rate. Dhal recovery was 63.18%.

Mini dhal mill; pigeonpea; roller speed; feed rate

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