Automated waste water recycling system using advanced electro-coagulation unit

An electrocoagulation unit for use in an automated waste water treatment system, wherein the automated waste water treatment system includes a control unit, a collection tank that holds waste water, a first flow line connected to the collection tank and to the electrocoagulation unit, a clarifier, a polymer dosage tank, a filter feed tank, a pressure sand filter (PSF), an activated carbon filter and/or iron removal filter (CIRF), an ultrafiltration (UF) system, and a reverse osmosis (RO) system, the electrocoagulation unit comprising:

• a nonconductive outer shell having an interior space;
• an electrocoagulation feed line connected to the first flow line, the electrocoagulation feed line including a plurality of electrocoagulation feed pipes connected to a bottom surface of the nonconductive outer shell to feed the waste water received from the first flow line into a lower portion of the interior space;
• an air grid controlled by the control unit;
• and
• an electrode assembly placed substantially within the nonconductive outer shell,
• wherein the electrocoagulation unit is connected to the first flow line to receive the waste water and to output the waste water as coagulated waste water,
• wherein the electrode assembly includes a plurality of electrodes exposed to an upward flow of the waste water, a plurality of holders constructed to hold the plurality of electrodes, and an electrode lifting arrangement placed on a top edge of each of the plurality of electrodes, wherein the plurality of electrodes comprises a plurality of anodes and a plurality of cathodes, and
• wherein the air grid purges waste material from the plurality of electrodes to extend the plurality of electrodes' working lifespan and to ensure that active electrocoagulation on the electrode assembly remains efficient.

A pressure sand filter for filtering sludge-free waste water to produce sand-filtered water for an automated waste water treatment system, wherein the automated waste water treatment system includes a control unit, a collection tank that holds waste water, a first flow line connected to the collection tank and to an electrocoagulation unit, a clarifier, a polymer dosage tank, a filter feed tank, an activated carbon filter and/or iron removal filter (CIRF), an ultrafiltration system, and a reverse osmosis (RO) system, the pressure sand filter comprising:

• an external shell having an internal region constructed to hold sand of varying grain size;
• a receiving adapter constructed on an upper region of the external shell such that the receiving adapter connects the third flow line to the pressure sand filter;
• and
• a pressure sand filter-backwash pump configured to backwash sand filtered water from a lower internal region of the external shell to an upper internal region of the external shell to purge obstructive material from the pressure sand filter,
• wherein the sand is biased from a large grain size at the upper internal region of the external shell to a lower grain size towards the lower internal region of the external shell.