Inorganic substances such as sand, gravel, and silt, which are denser than water, and hydrophobic substances such as vegetable/animal oils and petroleum derivatives, which are less dense than water, create very serious operational problems for treatment plants. 

 While sand particles cause very rapid mechanical wear (abrasion) in pumps and pipes, oils stick to the inner walls of pipelines causing blockages, and in biological basins, they prevent bacteria from receiving oxygen, leading to a decrease in treatment efficiency. 

 Our oil and sand trap systems are mechanical pre-treatment systems designed to separate these two pollutants of different characteristics from water within a single compact or multi-compartment reinforced concrete/package unit. 

 Our systems generally operate according to the "Aerated Grit and Grease Chamber" principle. 

 Thanks to the fine/medium bubble air given from the bottom to the wastewater advancing along the channel, a spiral rotational movement (helical flow) is created in the water. 

 Thanks to this controlled movement, organic materials are prevented from settling to the bottom, while heavy sand and gravel particles settle into the sand collection hopper at the bottom of the basin. 

 At the same time, the rising air bubbles attach to the oil and grease droplets in the water, carrying them towards the water surface and creating an oil layer (scum) on the surface. 

 A mechanical scraper bridge (scum scraper) located at the top of the basin continuously scrapes the oil on the surface and transfers it to the oil collection hopper; 

 the sand at the bottom is drawn by submersible pumps or air-driven systems (air-lift) and sent to the sand separator. 

 Protecting your facility from mechanical wear and biological blindness, these systems are the key to sustainable operational success.