Patent ID: 7390419

Claim:
A waste water recovery system to filter and recirculate waste water to a wash system including a fluid recovery line, a fluid supply line and a fluid backwash line comprising: a filter assembly including a water filtering section, to receive waste water from the wash system and to recirculate filtered water to the wash system and a filter backwash section to selectively clean said water filtering section when a predetermined system condition exists and a fluid control including a plurality of valve assemblies operatively coupled between the wash system, said water filtering section and said filter backwash section to selectively control the circulation of water through said water filtering section to recirculate the recovery water to the wash system and to clean said water filtering section in a backwash mode to said fluid backwash line when the predetermined system condition exists and a control section including control logic to control the operation of said plurality of valve assemblies; the filter assembly provided with at least one filter, each of the at least one filter(s) having a filter chamber containing a filter element dividing the filter chamber between a filter outlet side having a filter outlet and a filter port side, a pressurized air source coupled to an air purge inlet on the filter outlet side; the valve assemblies including an air purge outlet located on the filter outlet side of the filter element, the air purge outlet coupled to said fluid backwash line for exhausting air introduced into the filter assembly during the backwash mode, the fluid backwash line coupled to the filter port side.