1, management regulations: Yiwu City requires catering enterprises, unit canteens, etc. to install grease trap, and develop corresponding management regulations, such as regular cleaning, inspection and maintenance of grease trap to ensure its normal operation.

2, charges: Yiwu grease trap charges based on the volume of the grease trap, the frequency of use, the difficulty of cleaning and other factors, some areas use monthly or yearly charges, while some other areas use a fee based on the amount of use.