In this study, waste and discarded cooking oils (WCO) of palm, sunflower, rice bran groundnut are collected from local restaurants. The high viscous WCO was converted into oil biodiesel (WCOBD) by a single-stage transesterification process. During the process, important parameters which show significant change in yield studied using optimization tool response surface methodology (RSM). Results ...

Repeated use of cooking oil had been proven hazardous due to degradation process that contributes to the formation of polar compounds in the oil. Presently, the rate of cooking oil degradation is indicated by the percentages of its total polar compounds (TPC). In this study, impedance sensor probe was designed to assess the cooking oil degradation at several heating time intervals by measuring ...

Cooking oil that is used repeatedly called cooking oil. Due to the very high price of oil, people still use for daily cooking, even though it dangerous health and can cause a number diseases, such as stroke, coronary heart disease, hypertension, cancer. Parameters are quite important determine quality based on Indonesian standards color parameters, pH, free fatty acid levels turbidity. These fo...