The EST grease separators meet the requirements of the PN-EN 1825 standard. The EST and EST-H separators are CE marked for use in the European Union.
Separators have a watertight concrete body (See: Concrete chambers and tanks) and usually do not need extra load. Depending on the separator's location cast iron or cast iron and concrete manholes classes A15, B125, C250 and D400 or higher are used. In order to adjust the location of the separator's manhole slab to ground elevation there is an additional top element used made of concrete rings corresponding to the diameter of the separator's body. When the sewer system is located deep in the ground, a reduction slab and a chimney made of Dw = 1000 rings can be used. The inlet and outlet are located in the axis of the separator. It is also possible to deviate inlet and outlet axes (consult the catalogue for details) as well as connect several inlets.
Grease separators EST
A separator placed in a concrete tank with foundation on bearing soils up to 10 m below ground level does not need special foundation and does not need static calculations. Normally, excavation death is prepared using minimum 10 cm C8/10 (B10) concrete substructure or well-compacted layer of gravel or other course non-cohesive soil.
Separators should have gravitation inflow. In case of the need for wastewater pumping it is recommended that the pumping station is located after the separator. A separator must be located in a place providing access for a suction vehicle.
In order to reduce maintenance costs and improve ecological safety there is a possibility to connect a separator to alarm systems (See: Monitoring Systems) such as sediment level sensors, oil and overflow sensors. Regular monitoring of the device limits the necessity to physically control the device and shortens the reaction time of maintenance teams in case of a failure.
In grease separators organic oils are separated by means of gravity in the process of flotation. Due to lower density of grease particles than water particles, grease accumulates on the surface of water. The unique shape of deflectors placed inside the separator's body (at the inlet and outlet) forces a certain direction of wastewater flow and prevents the separated grease particles from leaving the separator. All impurities of higher density that flow into the separator settle on the bottom of the device.
Grease separators for organic grease (EST) are most often used for pretreating of wastewater coming from food industry facilities. They are typically used at restaurants, canteens, meat packing plants, dairies and other facilities that produce wastewater containing grease particles (according to PN-EN 1825 grease is defined as plant and animal fats and oils insoluble or having little solubility in water with the tendency to saponify).