Companies of public catering that are also known as enterprises of restaurant and hotel business, include:

• Bars/cafe;
• Restaurants and bistros;
• Hotels;
• Fast food / gastronomy stores;
• Canteens and other public catering companies of own property or managed under the work contract.

Sewage water formed in result of such business activities can become a source of pollution due to the high content of grease, oil, fat and other food byproducts, and also the cleaning agents. These pollutions cause a number of problems related with exploitation of sewerage settings.