Quality test of restaurant cooking oil waste in terms of moisture content, specific gravity, and energy as a feed supplement

The purpose of this research was to determine the quality of waste oil from a restaurant on moisture content, specific gravity, and energy as a feed supplement. Fresh oil sampling is only done 1 time at the beginning and waste oil sampling is done 3 times on different days every 3 days. The data obtained were tabulated and analyzed of variance according to a nested Randomized Block Design (RBD) for waste oil in 4 restaurants (Wong Solo, Ocean Garden, Yogyakarta, and H Slamet) with 3 groups using Microsoft Excel. The variables observed were water content, specific gravity, and energy in the new cooking oil and its waste. The analysis of moisture content and specific gravity was carried out at the Laboratory of Nutrition and Animal Feed, Faculty of Animal Science, Brawijaya University, Malang, and the energy content analysis was carried out at the Integrated Research and Testing Laboratory, Gadjah Mada University, Yogyakarta. The results showed that the types of oil used were bimoli oil (T1 and T2), dorang oil (T3), and tropical oil (T4). The new bimoli oil consists of a water content of 0.37%, specific gravity of 0.95 kg/L, and energy of 9488.89 kcal/kg. In dorang oil, the water content is 0.04%, specific gravity is 0.89 kg/L and energy is 9219.78 kcal/kg, while in tropical water content is 0.04%, specific gravity is 0.96 kg/L, and energy is 9230.50 kcal/kg. Based on the analysis of variance from the 4 restaurants, the results showed that the water content, specific gravity, and energy of waste oil in the four restaurants were not significantly different (P > 0.05). It concluded frying food but has the potential to be used as animal feed supplements for both ruminants and non-ruminants This chapter determines the quality of waste oil from a restaurant on moisture content, specific gravity, and energy as a feed supplement. Cooking oil is one much needed by Indonesian people, and this is proven with a quantity of more than 290 million tons of oil consumed annually by public. Waste cooking oil can be used as a mixture of animal feed because cooking oil contains high energy compared to other feed ingredients. Fresh oil sampling is only done 1 time at the beginning and waste oil sampling is done 3 times on different days every 3 days. Cooking oil changes color from yellow to darker color. Cooking oil can be used up to 3-4 times for frying. The used cooking oil is said to have been damaged or can be called used cooking oil and is not good for consumption.