According to GB18483-2001 "Catering Industry Oily Smoke Emission Standard" stipulates 2mg/m3 as the only acceptance standard. Catering units that have passed acceptance using this standard can be considered to be up to standard and legal in terms of their emissions, but it cannot be confirmed that their exhaust emissions are not a nuisance to the public.

Even for restaurants and other catering industries that adopt overhead emission of oily fumes, it is entirely possible that the air pollution of public **** space on the top of the building due to the oily fume exhaust may lead to serious complaints, especially at the bottom of the building directly emitting oily fumes and the complaints caused by it are countless. It is necessary to adopt different acceptance criteria for different ways of emitting grease and fumes. Too many acceptance standards may bring about the implementation of operational difficulties and arbitrariness, more feasible is the direct emission of low-altitude type and high-altitude emission type to implement two types of acceptance standards.

The current environmental protection department in accordance with the national standard acceptance criteria in dealing with the monitoring and acceptance of the high-altitude emission type of fumes encountered fewer problems, therefore, the continuation of the use of this standard before the introduction of the new more stringent national standard does not seem to be inappropriate. But the current national standards for low-altitude emission type fume acceptance is not very practical significance.

City residents' complaints about fumes basically belong to the fumes of a longer period of time after the continued disturbance, high-altitude emissions of fumes in addition to unsightly, generally not a wider range of neighbors caused by direct disturbance, resulting in the probability of neighbors complaining of indignation is far less than the case of low-altitude emissions, high-altitude emissions even if they are not up to par, usually fewer complaints, but even if low-altitude emissions completely up to the standards of emissions, there are few instances of not being complained about, but the low-altitude emissions, even if it is completely up to the standards of emissions, there are few instances of not being complained about. However, even if the low-altitude emission type is fully compliant with the emission standards, there are few instances of no complaints, so it can be seen that the acceptance standard of the low-altitude emission type must be much higher than the existing single standard.

The ideal acceptance standard for low-altitude direct emissions is of course "smoke-free, odorless, ambient temperature emissions at all times"; "smoke-free emissions" is a sensory criterion that varies from person to person, and is obviously unreasonable as an environmental acceptance standard. Obtained: Select the most typical Sichuan and Hunan cuisine restaurants of different sizes, and require long-term monitoring of its critical state under saturated passenger flow, full-time smoke-free emission purification effect of the peak concentration of exhaust fumes, and this peak as a standard quantitative value of smoke-free emissions. In the actual monitoring process or on-site processing of complaints, you can directly judge whether it exceeds the standard with the naked eye, of course, in the administrative penalties or other related procedures, still need to be legal instrument measurement data as a basis.