Restaurant swill is kitchen waste. Swill is the leftover food that a restaurant or family pours together after eating. Those leftovers are called swill. Those leftovers are also called swill, swill and swill, also known as food waste, which is the leftover food waste used in the process of human life. Urban swill refers to the leftovers abandoned by people in restaurants, restaurants, schools, canteens and other places, excluding the leftovers such as vegetables and fish abandoned before cooking and the mixture of leftovers abandoned by people at home and water. Urban swill is generally collected in containers such as irregular iron drums or plastic drums, and transported by human tricycles. It is best not to throw swill, which will do great harm to the environment.