Borkar, Dr. P. A.KHOBRAGADE, ABHIPSA DHANANJAY.2019-10-032019-10-032019-07-30KHOBRAGADE, ABHIPSA D. (2019). Modification and performance evaluation of mini oil mill. Department of agricultural process engineering(Agricultural Engineering),Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Tech. 2019. Print. xv, 105p. (Unpublished).http://krishikosh.egranth.ac.in/handle/1/5810130202The mini oil mill was modified to lower the technical efficiency, to increase the oil recovery and oil extraction efficiency. In this experiment the modified mini oil was evaluated at different rotational shaft speeds. The performance evaluation of mini oil mill was carried out.A mini oil mill was modified and evaluated for its performance. The major components of the mini oil mill include the boiler, main frame, feed kettle, oil extraction chamber, oil canals and cake outlet. The performance of the mini oil mill was evaluated for extracting oil from safflower, at three shaft speed 28 rpm, 36 rpm, 44 rpm and length of reverse worm 38.1 mm, 50.8 mm, 63.5 mm and for two worm pitches i.e. high and low respectively. The response parameters investigated were oil recovery, cake recovery, oil extraction efficiency, feed rate and deficit oil yield. Two numeric variables 3 levels and one categoric variable 2 levels, 3 level factorial, reduced cubic model of response surface methodology by using Design Expert Software was used to optimize mini oil mill parameter for better oil recovery, oil extraction efficiency, lower percent cake recovery and feed rate, deficit oil yield in range. The physical properties of safflower oil seeds i.e. size, sphericity, bulk density, true density, porosity, angle of repose and coefficient of static friction were determined. A shaft speed of 36 rpm, length of reverse worm of 50.8 mm and worm pitch P2 was found to favour the oil extraction unit, while a oil recovery, cake recovery, oil extraction unit, feed rate and deficit oil yield was observed. The mini oil mill was therefore observed to perform the best at the optimum shaft speed 36 rpm and length of reverse worm 50.8 mm for worm pitch P2. The physiochemical properties of the oil i.e. saponification value, iodine value, free fatty acid, peroxide value, viscosity, polyunsaturated fatty acid and mono saturated fatty acid were analyzed for both worm pitches i.e high and low. The result of the study shows that the mini oil mill can extract oil from the safflower seeds satisfactorily. Besides, the mini oil mill can be used for other oil seeds eg. groundnut, sunflower, sesame, coconut etc.ennullThesis