Demonstration Testing of ZenoGem and Reverse Osmosis for Indirect Potable Reuse
City of McAllen, TX
CH2M Hill; Tempe AZ.
Report #51 - Abstract -
This study involved demonstation-scale testing of an integrated membrane bioreactor (MBR)/reverse osmosis (RO) treatment train to reclaim the City of McAllen's municipal wastewater to a quality suitable for use as a new drinking water supply.
The demonstration testing objectives included:
(1) demonstrate that RO product water meets all federal primary and state secondary drinking water regulations;
(2) demonstrate reliable operation of the MBR on screened, de-gritted sewage, particularly with respect to control of membrane fouling through automatic cleaning;
(3) demonstrate the MBR filtrate (RO feedwater) can be efficiently processed by composite RO membranes with minimal fouling; and
(4) develop estimates of capital and operating costs for a MBR/RO system.
The results showed that:
(1) the ZenoGem process is capable of producing a filtrate suitable for RO treatment while meeting the City's current wastewater effluent discharge requirements; and
(2) the RO system is capable of producing a filtrate that meets all drinking water/reuse standards with minimal fouling and effective membrane cleanings.
For more information about the DWPR program, contact Kevin Price at: Bureau of Reclamation, 86-69000, PO Box 25007, Denver CO 80225; phone (303) 445-2260; or e-mail a message to MPrice@usbr.gov.