Patent ID: 7404926
Filing Date: 2008-07-29
Classification: B01D,C02F

Abstract:
1. A system for treating concrete process waste water containing entrained cementitious particles, the system comprising: a pre-filtering means for receiving waste water from an input line and filtering relatively large particulate matter from the waste water, said pre-filtering means having a first output line; at least one polymeric membrane tangential flow filter connected to said output line of the pre-filtering means, and having a pressure vessel adapted for receiving the waste water under pressure, a polymeric membrane filter disposed within the pressure vessel, for filtering relatively small particulate matter from the waste water, and a second output line for discharging filtered waste water; pH adjusting means for adjusting the pH of waste water filtered by the at least one polymeric membrane tangential flow filter, said pH adjusting means connected to said second output line downstream of said pre-filtering means and said polymeric membrane tangential flow filter; said pH adjusting means including: mixing means, connected to said second output line, for mixing the neutralizing agent with the filtered waste water; a housing including a base and a frame mounted on the base, said base forming a skid adapted for moving the system using a forklift, whereby said filter, said mixing means, and said pH adjusting means are mounted on said skid and within said frame, said housing being adapted for transportation and protection of the system; a container connected to said second output line for storing the filtered and pH adjusted waste water; wherein the filtered and pH adjusted waste water is reusable; and means for disposing the filtered particulate matter.