OPTIMIZATION OF PIGEONPEA MILLING PROCESS
KrishiKosh
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Title |
OPTIMIZATION OF PIGEONPEA MILLING PROCESS
M.Sc. |
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Creator |
INDORE, NAVNATH SAKHARAM
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Contributor |
J. P. Sinha
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Subject |
husking, milling, pigeonpeas, productivity, grain, grain legumes, sampling, tillage equipment, inorganic acid salts, crop residues
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Description |
T-8821
Pigeonpea (Cajanas cajan) is one of the important pulse crops of India, contributing about 20% to the total production of all pulses. Pulses are also referred to as a source of “Poor man’s Protein”. The hull of pigeonpea is tightly attached to the cotyledons via a thin layer of gums, which makes it problematic for milling. The present research was undertaken to study the milling characteristics of pigeonpea and to optimize the pre-milling treatment for maximum dal recovery with IARI Mini Dal Mill. The cleaned and graded lots of pigeonpea c.v P-992 of moisture content 10% ± 0.5 % were subjected to pre-milling treatment. The pre-milling treatments which were undertaken for the study namely: heat and hydrothermal treatment considering the conditions of rural area. Experiments were conducted for four levels of temperature (Temp. 65, 85, 105, 125˚C) and residence time (2, 4, 6, 8 min) in heat treatment. However, three levels of steam pressure (0.5, 1, 1.5 kg/cm2) and residence time (5, 10, 15 min) were taken for the study for hydrothermal treatment. Dehulling was done with emery plate chakki. Under hydrothermal treatment, steam pressure 0.5 kg/cm2 for 10 min yielded maximum hulling efficiency: 84.53 % and finished product recovery: 52.07 %. However, heat treatment at temperature 85 ± 5˚C for 4 min resulted to the maximum hulling efficiency: 84.28 % and product recovery: 53.53 %. Milling by IARI Mini Dal Mill yielded finished product recovery: 72.83 % and hulling efficiency: 90.47 % with pre-milling heat treatment at 85 °C for 4 minute and hydrothermal treated lot resulted finished product recovery: 74.96% and milling efficiency: 90.77 %. Further increase of product recovery and dehulling efficiency was observed with scouring the kernel before treatment. Cost of processing was found to be 1.25 Rs./kg and 1.60 Rs./kg for heat and hydrothermal pre-milling treatment and milling by IARI Mini Dal Mill, respectively. |
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Date |
2016-06-24T15:22:39Z
2016-06-24T15:22:39Z 2013 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/67978
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Format |
application/pdf
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Publisher |
IARI,DIVISION OF AGRICULTURAL ENGINEERING,NEW DEHLI
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