Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-06-17
1990-02-27
Fisher, Richard V.
Liquid purification or separation
Processes
Treatment by living organism
210622, 210623, 210167, 2101951, 210196, 210259, 210903, C02F 330
Patent
active
049043870
ABSTRACT:
A waste treatment and water recycling system that includes a delivery system, a trap, a sump, an anoxic reactor, an aerobic digestion chamber, a filtering system, an adsorption system, a disinfecting system and a water return system. The delivery system includes one or more flush-type toilets and urinals which receive flush water from the water return system and deliver the toilet and urinal waste and flush water to the anoxic reactor. The anoxic reactor contains bacteria which utilizes organics in the toilet waste to convert oxidized nitrogen compounds, such as nitrates, to nitrogen gas, produce bicarbonates and other products. The bacteria, in accomplishing this, lower the organic load on subsequent processes. A denitrified liquid containing bicarbonates and reduced amounts of organics is transferred to the aerobic digestion chamber, which contains biologically active solids and in which organic carbon, organic nitrogen, and ammonium compounds are oxidized by bacteria to obtain a liquid product high in concentration of oxidized nitrogen compounds such as nitrates and low in soluble carbonaceous compounds. This liquid product is filtered, treated with activated carbon, disinfected, and subsequently returned to the toilets and urinals as colorless, clear and odorless flush water containing oxidized nitrogen compounds such as nitrates. A portion of this liquid is recycled directly back to the trap to provide a constant flow of nitrates into the anoxic reactor during periods of toilet usage. The oxidized nitrogen compounds produced in the aerobic digestion chamber insure prevention of odors in the system.
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Fisher Richard V.
Thetford Corporation
Upton Christopher
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