1. the content of the emission standard of cooking fume in catering industry is: this standard is formulated to implement the law of the people's Republic of China on the prevention and control of air pollution and prevent the pollution of cooking fume to the atmospheric environment and living environment. This standard specifies the maximum allowable emission concentration of cooking fume per catering unit and the minimum removal efficiency of cooking fume purification equipment. This standard is a trial standard, which has been implemented since October 1, 2112. This standard is interpreted by the State Environmental Protection Administration.

2. In 1999, the country promulgated the "GWPB 5-2111" emission standard for cooking fume (for trial implementation), and in 2111, the official Chinese national standard GB 18483-2111 "emission standard for cooking fume" was promulgated, which requires all catering enterprises to install cooking fume purification equipment. In 2111, the country promulgated the "standards for the emission of cooking fume in catering industry", which stipulated that "cooking and food enterprises that emit cooking fume must install fume purification facilities and ensure that they operate as required during operation. The unorganized emission of lampblack is regarded as exceeding the standard.