Top Grease Trap Supplier for Commercial & Industrial Wastewater

As a grease trap supplier, Qingdao Jinwantong provides grease separation equipment for commercial kitchens, food service facilities, food processing plants and industrial wastewater pretreatment systems. A grease trap, also known as a grease interceptor, grease separator or FOG removal unit, is used to remove fats, oils, grease, floating scum and part of settleable solids from wastewater before discharge or further treatment.

In commercial and industrial kitchens, wastewater may contain cooking oil, animal fat, vegetable oil, sauces, cream, food residues, detergents and suspended solids. If these pollutants enter drainage pipelines directly, grease can cool, solidify and attach to pipe walls. This may cause slow drainage, odor, pipe blockage, emergency cleaning costs and higher load on downstream wastewater treatment systems.

The basic working principle of a grease trap is gravity separation. Wastewater enters the inlet chamber and the flow velocity is reduced. Since grease is lighter than water, it rises to the surface and remains in the grease storage zone. Heavier food particles and solids settle at the bottom. The middle water layer then flows out through the outlet to the sewer, drainage system or next treatment unit.

A typical process is:

A complete grease trap system may include an inlet pipe, flow baffle, separation chamber, grease storage area, solids settling zone, outlet pipe, removable cover, sealing structure, cleaning access, sludge discharge section and optional monitoring components. For commercial kitchen applications, stainless steel is often preferred because it is hygienic, corrosion-resistant and easy to clean. For larger outdoor or industrial projects, carbon steel with anti-corrosion coating, FRP or other materials can be selected according to wastewater properties and installation environment.

For correct selection, buyers should consider flow rate, peak discharge, grease concentration, suspended solids, wastewater temperature, pH, number of sinks or production lines, operating hours, installation space, indoor or outdoor placement, inlet/outlet height, cleaning frequency and discharge requirements. These factors affect tank volume, retention time, internal structure, material choice and maintenance design.

It is important to understand the treatment boundary. A grease trap mainly removes separable FOG and settleable solids. It cannot fully remove emulsified oil, dissolved COD, detergents, nutrients or soluble pollutants. If stricter outlet water quality is required, the grease trap may need to work with CPI oil-water separation, dissolved air flotation, chemical dosing, biological treatment, filtration or packaged sewage treatment systems.

Qingdao Jinwantong supports B2B buyers with customized grease trap supply and related wastewater treatment equipment. Buyers can send wastewater source, flow rate, grease load, installation space, material preference and discharge target for technical selection and quotation.