This research objectives are to develop a clear and fat separator of the Jatropha oil and to evaluate the performance. A machine consisted raw materials tank reactor clear and separated tank and control set. The reactor has diameter and the capacity of 50 cm and 90L and heated by electrical heater (3000 W). Flat blade agitator is driven by 0.25 HP of motor with 150 rpm and cooled by the water tube coil in diameter of 2.5 cm inside reactor tank. The clear and fat separated tank has a diameter and the capacity of 50 cm and 110L. From the evaluation of the machine performance raw jatropha oil (40 L) properties are viscosity and flash point of 42.66 cP and 240oC. After esterification process at temperature of 60oC at 150 rpm agitation for 60 min washed five times with water oil ratio is 1: 2 at a time for 20 min and then boiled to remove water for 60 min. The oil is reacted in tranesterification process at temperature of 60oC 150 rpm for 60 min and precipitated glycerol for 90 min and then washed and boiled to remove water. The products are glycerin (15 L) and ester oil (25 L) with the viscosity and flash point are 42.16 cP and 150oC and the color changed to clear yellow. The machine cost is 39690 THB. and payback period is 75 days

This research’s objectives were to develop an energy saving rotary dryer for paddy using hot air recovery system and to evaluate the energy using. Rotary dryer divided rotating cylinder made of 304 stainless steel 2 mm of thickness 39 cm and 200 cm of diameter and length. The inverter was used to control speed of gear motor of 0.5 HP and rotating speeds of 1-3 rpm. The inside of cylinder composed screw and capture flights. The cyclone system was used to dust separating from the system. The moisture trap contained silica gel the outlet hot air was reduced moisture and recovered using. The fiber glass insulator was applied for reducing energy loss. The heating box composed 3 set of 1600 W heaters and blower motor power was 0.5 HP. In the experiment the drying temperature was varied of 50 60 70 and 80oC and cylinder speed was varied of 1 2 and 3rpm (15.66 10.66 and 5.66min of drying time). The initial moisture content of 10 kg paddy was 29.7?0.6 %wb. The result show that the optimum conditions drying temperature and cylinder speed were 70-80oC and 1 rpm (15.66 min) and final moisture content was 9.2-11.8 %wb. From the save energy testing found that the reducing of SEC was 0.4-0.6 MJ/kg water per drying cycle. There for this developed dryer can save energy using