초록 ▼

A wastewater treatment system for treating wastewater containing undesirable pollutants which comprises a housing having a bottom and defining an internal chamber. The internal chamber is provided with a first and second baffle member which cooperate to define a mixing zone and a separation zone. Wa

A wastewater treatment system for treating wastewater containing undesirable pollutants which comprises a housing having a bottom and defining an internal chamber. The internal chamber is provided with a first and second baffle member which cooperate to define a mixing zone and a separation zone. Wastewater (containing a sufficient amount of air so that the air present in the wastewater exceeds the solubility of air in the wastewater) is introduced into the mixing zone of the internal chamber, and an aerated water is sprayed into the wastewater to produce a quantity of air bubbles sufficient to promote the flotation of pollutants having a density approximately equal to that of the wastewater to form a froth. Pollutants having a density substantially greater than the density of water settled to the bottom portion of the housing. An effluent reservoir assembly (which forms a reservoir zone) is spatially disposed from the second baffle member so that a quiescent zone is formed therebetween. The effluent reservoir assembly is provided with a fluid inlet opening and a fluid outlet opening and defines a fluid flow passageway between the reservoir zone, the first quiescent zone and the effluent discharge zone. When it is determined that the wastewater should be subjected to additional treatment, an effluent transfer assembly can be incorporated into the housing for selectively passing a portion of the treated wastewater from the effluent reservoir assembly to the mixing zone of a treatment cell. In such instance, additional air is introduced into the treated wastewater prior to discharge into the mixing zone to promote mixing and to insure that the amount of air present in the treated wastewater is an amount sufficient to exceed the solubility of air in the treated wastewater. An effluent discharge assembly is supported by the housing in a spatially disposed position relative to the effluent reservoir assembly so as to define the effluent discharge zone of the chamber therebetween. The effluent discharge assembly is adapted to discharge the treated wastewater from the effluent discharge zone for discharge into a sewer or for reuse.

대표청구항 ▼

A wastewater treatment apparatus comprising: a housing having a bottom and defining an internal chamber, with a mixing zone comprising a portion of the internal chamber; means for introducing wastewater into the mixing zone, means for introducing air into the wastewater prior to the wastewater being

A wastewater treatment apparatus comprising: a housing having a bottom and defining an internal chamber, with a mixing zone comprising a portion of the internal chamber; means for introducing wastewater into the mixing zone, means for introducing air into the wastewater prior to the wastewater being introduced into the mixing zone in an amount sufficient so that large air bubbles are formed in the mixing zones; and spray means for spraying water into the wastewater in the mixing zone so that the sprayed water contacts the large air bubbles in the mixing zone and substantially reduces the size of the large air bubbles in the mixing zone.