Hotel wastewater must first pass through the grease trap. Then the process is varied.

Common:

Hydrolytic acidification-oxidation ditch or biological contact oxidation or other types of oxygen-consuming processes-inclined plate sedimentation tank-coagulation filtration (quartz sand)-activated carbon-disinfection-effluent.

or add dissolved air flotation in front of hydrolytic acidification process (some do).

if the indexes of ammonia nitrogen and phosphorus in the effluent are not very strict, the above will do.

Otherwise, reflux is needed to remove ammonia nitrogen, or anaerobic dephosphorization is added, or chemical dephosphorization with coagulant is added.