Water recycling system

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.

An ion exchange bed for a water treatment system comprising:

• a tank for containing ion exchange resins, an inlet and an outlet in said tank for flow of water to be treated through said bed,
• means for supplying regenerating solution to said bed,
• an outlet for removing regenerant from said bed during regeneration, and
• a monitor for monitoring the position of the regenerant in said bed, said monitor being connected to stop regeneration before said regenerant reaches said outlet.

A biological digestor for a water treatment system comprising:

• a tank adapted to be partially filled with waste-water,
• means for supplying waste-water to said tank,
• rotating disks mounted in said tank for exposing said water to the air,
• a rotating wheel having a permeable outer membrane, said rotating wheel being mounted in said tank, said water diffusing through said membrane to the inside of said wheel, and
• a separation unit, and
• a water scoop inside said rotating wheel for transferring water from the inside of said wheel to said separation unit.

A closed water recylcing system producing potable water from waste-water comprising:

• a buffer for storing waste-water,
• a biological digestor for decomposing sewage in said waste-water, waste-water from said buffer being supplied to said biological digestor,
• a filtration unit including an ultra-filtration membrane for removing virus, bacteria and organic molecules from said waste-water,
• multiple ion exchange resins for removing organic materials, color and inorganic salts,
• a water cistern for storing processed water,
• means for intermittently moving water between said digestor, filtration unit, ion exchange resins and water cistern which are connected in a closed recycling system,
• monitoring means for monitoring the operation of said system, and
• a microprocessor responsive to the output of said monitoring means for controlling said means for intermittently moving water.