Gutter oil refers to the oil extracted from waste food or residues in the ditch. In a broad sense, gutter oil also includes waste cooking oil such as rancid oil and ten thousand year oil. In recent years, lawless people in mainland China have Restaurants and other restaurants recycle used waste oil and reprocess it, using gutter oil as cooking oil, which has attracted public attention. In 2010, Chinese experts estimated that this cooking oil accounted for one-tenth of the market in mainland China, including street stalls and high-end restaurants, and was used to prepare a variety of foods, such as fried dough sticks, mutton skewers, boiled fish, Spicy hot pot, etc., diners have no idea that the cooking oil used to prepare these foods is poisonous. After proper treatment, gutter oil can be made into products such as soap and biodiesel. Practice: Industrial Utilization After proper recycling and processing, gutter oil can have high industrial value. Properly recycled gutter oil can be remade into chemical products such as biofuel, soap, and aviation kerosene. Recycling of gutter oil is beneficial to environmental protection, but because there is a big profit difference between the use of gutter oil in industry and food, some of the gutter oil is refined and processed and mixed into edible oil sales channels to achieve higher profits. Some people believe that China's lack of gutter oil recycling channels and a complete waste oil refining industry chain similar to those in the West is the main reason for the proliferation of gutter oil. Soybean oil

Also known as soybean oil and salad oil, it is an oil extracted from soybeans. There are two commonly used extraction methods: pressing and extraction, and sometimes both are used together. The waste left after extracting soybean oil from soybeans is soybean meal, which is used in feed and food industries and is an excellent source of protein. Soybean oil is derived from soybean seeds and is the most produced oil in the world. Pressed soybean oil: Oil obtained by directly pressing soybeans. Extracted soybean oil: Oil produced from soybeans through the leaching process. Genetically modified soybean oil: Oil made from genetically modified soybeans. Soybean crude oil: Soybean oil that cannot be directly used for human consumption without any treatment. Finished soybean oil: soybean oil directly for human consumption that has been processed to meet national standards for finished oil quality indicators and hygienic requirements. Soybean oil has a darker color and a special beany smell; it has poor thermal stability and will produce more foam when heated. Soybean oil contains more linoleic acid, which is prone to oxidation and deterioration and produces "bean smell". In terms of edible quality, soybean oil is not as good as sesame oil, sunflower oil, and peanut oil. Method: Soybean oil is pressed from soybeans, and there are two types: cold-pressed soybean oil and hot-pressed soybean oil. Cold-pressed soybean oil has a lighter color and a lighter raw bean flavor; while hot-pressed soybean oil has a higher oil yield due to the high-temperature treatment of its raw materials, but has a darker color and a stronger raw bean smell. According to different processing procedures, it can be divided into crude soybean oil, filtered soybean oil and refined soybean oil. Crude soybean oil is yellow-brown, while most refined soybean oil is light yellow and has greater viscosity. After being left in the air for a long time, the surface of soybean oil will form a weak film. Soybean oil has higher nutritional value than other oils

Gutter oil refers to the oil extracted from waste food or residues in the ditch. In a broad sense, gutter oil also includes waste cooking oil such as rancid oil and ten thousand year oil; In recent years, criminals in mainland China have recycled used waste oil from restaurants and reprocessed it, using gutter oil as cooking oil, which has attracted public attention. In 2010, Chinese experts estimated that this cooking oil accounted for one-tenth of the market in mainland China, including street stalls and high-end restaurants, and was used to prepare a variety of foods, such as fried dough sticks, mutton skewers, boiled fish, Spicy hot pot, etc., diners have no idea that the cooking oil used to prepare these foods is poisonous[1][2]. After proper treatment, gutter oil can be made into products such as soap and biodiesel. Soybean oil, also known as soybean oil and salad oil, is an oil extracted from soybeans. There are two commonly used extraction methods: pressing and extraction, and sometimes both are used together. The waste left after extracting soybean oil from soybeans is soybean meal, which is used in feed and food industries and is an excellent source of protein.

Reference: wiki