The development of a small-scale palm oil mill producing crude palm oil by the vacumm frying process
Songklanakarin Journal of Science and Technology 01/2000;
This study aims to design and develop a new dry palm oil milling process which yields a good quality Crude Palm Oil (CPO) without mixing of Crude Palm Kernel Oil (CPKO) in the first extraction. The process uses vacuum fruit frying process with a twin screw press. The advantages of this process are (1) no waste water (2) a good quality crude palm oil in the first extraction (3) safety due to no pressure vessel and better working condition for workers since there is no smoke during the frying process (4) low maintenance cost due to the homogeneity of the fried fruits. After the extraction process, the palm cakes are milled and dried before extracting the residual palm oil in the fibre and the kernel oil by using single screw presses. The mixed oil from the second extraction process is suitable for raw material in small-scale soap making factories. The palm cake can be used for animal feed or can be sold to granulated tapioca factories, or can be used as fuel.This project was supported by the Department of Industrial Economics, Ministry of Industry, with a budget of 2 million Baht in 1997-1998. A pilot mill at a production capacity of 1 ton FFB (Fresh Fruit Bunch) per hour was established at Pikul Thong Research Center in Narathiwat Province in August 1998. The extraction efficiency was 19% of FFB for the first extraction and 3.5% of FFB for the second extraction. The unint operation cost in 0.65 Baht per kilogram of palm fruit which is higher than the operation cost of the large mill. However, the appropriate capacity of such mill should be between 2-5 tons FFB per hour which requires an investment cost 12 to 20 million Baht
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