I have construction drawings of the hotel’s environmentally friendly grease tanks and septic tanks, which are patented technologies. Full name: Kitchen waste kitchen sewage treatment and gutter oil recovery device - oil septic tank, which can treat hotel kitchen sewage, kitchen waste (swill) and recover gutter oil. It has been sampled and tested on-site by the Zhengzhou Urban Drainage Monitoring Station , the grease content of 21.7 mg/L in the treated sewage is far lower than the technical index of 100 mg/L of the maximum grease content specified in CJ 3082-99 "Water Quality Standard for Sewage Discharge into Urban Sewers". The device requires no power, no energy consumption, no consumables and no subsequent management costs during operation. Not provided free of charge, patented area license. The septic tanks and grease traps in the current national standard atlas cannot meet the CJ 3082-99 "Water Quality Standard for Sewage Discharge into Urban Sewers", and they cannot handle food waste.