1, see transparency.
Ordinary oil that people eat is very translucent. When you put oil on a piece of paper with words written on it, you can clearly see the words on the other side from one side in the sun, while gutter oil is completely different. The gutter oil is turbid, and the more it is mixed, the more turbid it is. You can observe the clarity of the oil.
Step 2 smell it
The normal edible oil that people eat is the fragrance of an edible oil, such as peanut oil. If you smell it carefully, it will smell like peanuts, and corn oil will smell like corn. Unlike gutter oil, gutter oil will have a strange smell of chemicals, and if you smell it carefully, you will smell a sour taste.
Step 3 put it in the refrigerator
Put the oil in the refrigerator for about five to eight degrees Celsius, about two to four hours, and then take it out. If the oil is crystalline, it is probably gutter oil, because there is quite a lot of animal oil in gutter oil. You can also use fire. If it gets thicker and darker, it's probably gutter oil.
Disposal method of waste oil:
1. Recovery: During the collection and treatment of waste edible oil, a scientific collection system is adopted to collect waste edible oil uniformly. After refining, it can be transformed into industrial raw materials and made into soap, lubricating oil and other products, which can promote the development of environmental protection industry.
2. Biodegradation: The waste edible oil is treated with a biodegradable agent to degrade the harmful components in the waste edible oil, thus minimizing the harm of the waste edible oil to the environment.
3. Heat utilization: converting waste edible oil into fuel, such as biodiesel and liquefied petroleum gas, for gas or industrial painting in catering units, which can not only reduce environmental pollution, but also reduce the use cost of fuel.