초록 ▼

A closed water recycling system produces portable drinking water from total domestic waste-water, including household sewage. A microprocessor monitors the operation of the system and automatically back-flushes the ultra-filter assembly, regenerates the ion exchange bed when the monitored variables

A closed water recycling system produces portable drinking water from total domestic waste-water, including household sewage. A microprocessor monitors the operation of the system and automatically back-flushes the ultra-filter assembly, regenerates the ion exchange bed when the monitored variables indicate this is necessary, and acts as a failsafe monitor to insure water quality by shutting down the system in case of a malfunction. For example, the bed includes acid and base regenerated resins having different specific gravities. When a monitor indicates that the bed requires regeneration, a water flush separates resins by specific gravity. Acid and bas regenerating solutions are supplied to opposite sides of the bed. The flow of regenerating solution is stopped when the salt band produced during regeneration approaches an outlet at the middle of the bed. By stopping regeneration before excess regenerative has entered the bed, a saving in regenerating solution is effected and reduction in rinse water is effected, keeping the water losses from regeneration to a minimum. (It is desireable to have only a small amount of by-product water of high salt content to dispose of.) In a preferred embodiment, a rotational digestor has a wheel which evaporates the waste-water solution.

대표청구항 ▼

The method of processing waste-water into potable water comprising: biologically digesting sewage in said waste-water, filtering virus, bacteria and organic molecules from said waste-water, intermittently passing said waste-water through ion exchange resins to remove organic materials, color, and in

The method of processing waste-water into potable water comprising: biologically digesting sewage in said waste-water, filtering virus, bacteria and organic molecules from said waste-water, intermittently passing said waste-water through ion exchange resins to remove organic materials, color, and inorganic salts, monitoring the requirement for backflushing of the filter and conductivity of water passing through said ion exchange resins, and controlling the intermittent back-flushing of said filter and the regeneration of said resins with a microprocessor connected to respond to said monitoring.