Hello, there are probably several situations. First, the recycled kitchen may be used for some livestock. After all, the oil and water used as livestock feed grow fat, so it is also to prevent waste and reuse. Second, many criminals now use it to practice oil, which is a kind of waste oil. It doesn't matter if the kitchen waste is mixed with other garbage, because it is cooked in one pot. Just extract the oil and sell it to some black-hearted hotels or restaurants. This oil is highly carcinogenic. So now the country is cracking down very severely. Third, this kind of gutter oil is also refined, but it has different functions. Belonging to economic and environmental protection. It is reported that Dutch Airlines takes the refined waste oil as aviation fuel and demands 30 million tons from China every year. I wonder if you can understand this explanation.