Check the manufacturer's intended use and duty limits before treating a household disposer as catering equipment. The size of the premises does not establish whether its food volume and operating pattern are domestic.
What the observation tells you
Long sessions, concentrated preparation waste and business drainage arrangements can create requirements that a home-appliance description does not address. A motor still running after a busy day is not confirmation that the use is suitable. Business waste arrangements also need their own appropriate advice.
A useful next step
Give the manufacturer and repairer an accurate account of how the unit is used. Confirm service scope and equipment suitability rather than concealing the workload when seeking help.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.