AWWA MTC61121

To sustain itslong-term water needs, the City of Rio Rancho, New Mexico has undertaken a feasibility study to develop a waterreuse strategy that will significantly expand the use of reclaimed water, reducegroundwater withdrawals, and provide advanced treatment for aquifer recharge.Membrane treatment processes are proving to be promising technologies forwastewater purification and reclamation. This phase of the study involved pilot testingof an Integrated Membrane System (IMS) process. The process consisted of membranebioreactors (MBR) to provide tertiary treated water followed by reverse osmosis (RO)to provide purified water that can be injected into the groundwater. supplies. The pilot study was started in May, 2004 and completed inDecember, 2004.The reclaimed water pilot testing will achieve the following research needs:demonstrate that MBR effluent meets reclaimed water quality goals forcommercial, landscape irrigation and industrial uses as well as surface waterdischarge requirements;demonstrate the proposed IMS system (MBR?RO) meets water quality goals forSafe Drinking Water Act and New Mexico Water Quality Control Commissionstandards for groundwater recharge;provide training to City of Rio Rancho wastewater treatment operators onmodern technologies (MBR and RO);evaluate pretreatment and post treatment (including disinfection) requirements andconcentrate disposal options for the IMS; and,develop cost estimates (capital and O&M) for the proposed water reuse train. Pilot testing was conducted at the City of Rio Rancho Wastewater Treatment Plant No.2 (WWTP #2). This facility currently utilizes a conventional activated sludge processto treat approximately 3.0 MGD of municipal wastewater. The existing plant consistsof influent headworks (grit removal and mechanical screening), anoxic and aerationbasins, conventional clarifiers, and ultraviolet disinfection.Treatment at the pilot study consisted of prescreening, anoxic and aerobic basins,MBRs, and reverse osmosis. Screening equipment and membrane bioreactors and biological treatment basins are discussed. Includes table, figures.

Product Details

Edition:

Vol. - No.

Published:

03/01/2005

Number of Pages:

7

File Size:

1 file , 480 KB