1. According to different origins, kitchen waste can be divided into catering waste and kitchen waste. The former comes from the leftovers of restaurants and canteens, which has the characteristics of large quantity, relatively concentrated quantity and wide spread. The latter refers to the leftovers and leftovers abandoned by residents in daily cooking, which come from thousands of households and are huge but relatively scattered, and the overall amount exceeds that of catering waste. .

2. Kitchen waste, commonly known as swill and swill, also known as swill, is the floorboard of catering waste and kitchen waste. It is mainly the domestic waste formed by residents in the process of living consumption, and it is the first kind of food waste, including food processing scraps (kitchen waste) and food residues in families, campuses, canteens and catering industries.

3. Its composition is complex, and it is a mixture of oil, water, peel, vegetables, rice flour, fish, meat, bones, waste tableware, plastics, paper towels and other substances. Its characteristics are that it is easy to rot and deteriorate, emits stench, and spreads bacteria and viruses. The amount of kitchen waste in China is very large, and it is on the rise rapidly.

4. One minute it was a delicacy, and the next minute it was rubbish. Due to the food culture and the habit of gathering meals, kitchen waste has become a unique phenomenon in China. The table waste in China is amazing, and a huge amount of kitchen waste occurs every day. According to the statistics of relevant departments, the daily food waste (including discarded edible oil) is about 1,811-2,211 tons, and it fluctuates with different seasons.

5. Generally, the share of kitchen waste in the physical group of domestic waste is about 51%. According to the terminal treatment capacity of domestic waste of 1.8 million tons in 2115, if all kitchen waste can be separated by wet and dry, the theoretical quantity of kitchen waste will reach 1.9 million tons. Therefore, it is very important to separate the kitchen waste in order to classify the domestic waste. Therefore, it is particularly important to separate the dry and wet parts of households.