Patent ID: 6139730
Filing Date: 2000-10-31
Classification: B01D

Abstract:
An oil-water separator comprising:a multiplicity of chambers for the gravity-stimulated separation of wastewater into sedimented particles, oil or grease, and water without using pumps or sensors comprisinga first chamber into which the wastewater flows having vanes and at least one divider which enhance the sedimentation of suspended particles from the wastewater,an initial separation chamber separated from the first chamber by a wall, the wall having a screen mounted in the upper half of the wall,the wastewater flowing from the first chamber through the screen into the initial separation chamber,one or more separation chambers for the separation of oil or grease and water,each separation chamber having a skimmer which removes a layer of oil or grease which floats on the water after the wastewater has separated into a oil or grease layer and a water layer,a oil chamber which receives oil from the skimmers,the oil chamber having a skimmer which removes the layer of oil or grease for storage outside of the oil-water separator,the oil chamber having a water return which removes water from the oil chamber,the skimmer comprising a skimmer mouth, a skimmer outlet to the oil chamber, and a skimmer riser tube connecting the skimmer mouth and skimmer outlet,the skimmer mouth connected to the skimmer riser tube by means which allow positive adjustment of the height of the skimmer mouth,each separation chamber having a transfer pipe for draining water from the separation chamber into a separation chamber having a common wall with the separation chamber being drained or into a polishing chamber having a common wall with the separation chamber being drained,one or more polishing chambers which have a common wall with a separation chamber or polishing chamber being drained,each polishing chamber receiving water from an adjacent separation chamber or polishing chamber through a drainage pipe, anda final polishing chamber which is drained of water by an outlet pipe.