초록 ▼

A method and apparatus for reducing chemical oxygen demand levels in water which includes the steps of: (a) mixing the water to be treated with at least one oxygen source; (b) contacting the water with a first, activated alumina catalyst; (c) contacting the water with a catalyst selected from the gr

A method and apparatus for reducing chemical oxygen demand levels in water which includes the steps of: (a) mixing the water to be treated with at least one oxygen source; (b) contacting the water with a first, activated alumina catalyst; (c) contacting the water with a catalyst selected from the group consisting of Group VIIIB metals, Group IB metals, or mixtures thereof; (d) reacting chemical contaminants in the water with the oxgen source; and finally (e) contacting the water with an adsorptive material such as activated carbon. The present invention also includes a method and apparatus for regenerating the catalyst in situ by contacting the catalyst with alkaline and acidic aqueous inorganic regeneration solutions.

대표청구항 ▼

An apparatus for reducing chemical oxygen demand (COD) levels in water comprising: a waste water holding tank; a plurlaity of independent, individually isolatable reactors; catalyst contained in a fixed bed within each reactor, the catalyst, selected from the group consisting of activated alumina, G

An apparatus for reducing chemical oxygen demand (COD) levels in water comprising: a waste water holding tank; a plurlaity of independent, individually isolatable reactors; catalyst contained in a fixed bed within each reactor, the catalyst, selected from the group consisting of activated alumina, Group VIIIB metals, Group IIB metals, and mixtures thereof; means for conveying the water from the waste water hodling tank to the respective reactor; means for conveying at least one oxygen source to the water; means for discharging water away from each reactor; means for discharging water from the apparatus; and means for regenerating the spent catalyst while the catalyst remains contained within each respective reactor, the regenerating means associated with each respective reactor. An apparatus for reducing levels of chemical contaminants in aqueous media comprising: a holding tank for the aqueous media; a plurality of independent, individually isolatable reactors capable of being in fluid communication with one another; catalyst fixedly contained within each reactor, the catalyst selected from the group consisting of activated alumina, Group VIIIB metals, Group IIB metals and mixtures thereof; means for conveying the aqueous media from the hodling tank to the reactor, the conveying means comprising: (a) a main water pipe; and (b) a plurality of main water pipe branch lines connected at a first end to the main water pipe and at a second end to the base of the associated reactor; means for conveying at least one oxygen source to the aqueous media; means for discharging the aqueous media from the reactor, the discharge means comprising: (a) an exit pipe, having a first end affixed to and extending outward from the associated reactor; (b) a divider ventricle in communication with a second end of the exit pipe, the divider ventricle having a gaseous collector dome above the junction with the exit pipe with a gaseous escape vent located therein and a liquid phase collector portion; and (c) a return line connected to the liquid phase collector portion at a first end and connected to the main water pipe at a second end; and means for discharging the aqueous media from the apparatus.