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City of Rio Rancho Advanced Water Treatment Facility for Direct Injection
Elizabeth Bastien January 8, 2020
Recharge Project Authorization
- In New Mexico, projects are authorized by the
City of Rio Rancho Advanced Water Treatment Facility for Direct - - PowerPoint PPT Presentation
City of Rio Rancho Advanced Water Treatment Facility for Direct - - PowerPoint PPT Presentation
City of Rio Rancho Advanced Water Treatment Facility for Direct Injection Elizabeth Bastien January 8, 2020 Recharge Project Authorization In New Mexico, projects are authorized by the 1999 Groundwater Storage and Recovery Act (72-5A,
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Recharge Project Authorization
- 1999 Groundwater Storage and Recovery Act
(continued)
– As stated by the Act, recharge projects can
- Reduce capital and O&M costs.
- Improve water and environmental quality.
- Reduce groundwater level declines.
- Promote conservation of water.
- Serve the public welfare of the state.
- Lead to more effective use of the state's water resources.
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Recharge Project Authorization
- Regulations, 19.25.8 NMAC
– Issued by the New Mexico Office of the State Engineer (OSE). – Govern the application process and the requirements, permit terms, and conditions for projects authorized under the Act. – Effective January 31, 2001.
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Required Permits
- New Mexico Office of the State Engineer (OSE)
Underground Storage and Recovery Permit
– Demonstration project permit – Full-scale project permit
- New Mexico Environment Department (NMED)
Ground Water Quality Bureau
– Discharge permit
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Rio Rancho Direct Injection Project
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Background
- Middle Rio Grande Basin
surface & groundwater fully appropriated.
- City obtains its water supply
from groundwater.
- Population is projected to grow
from ~0.5 million people in MRG basin to 2 million in the next 50 years.
- Must secure additional sources
to meet future demands.
Mariposa WRF
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Rio Rancho Reclaimed Water
Residential and commercial use
GW Supply Well
Reclamation
Rio Grande Reuse
Source: Star Heights Park photo, City of Rio Rancho website
Reinjection
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Project Goals
- City of Rio Rancho
– Use reclaimed wastewater to recharge the Middle Rio Grande aquifer, and store for future use. – Improve water resource management by reducing the rate of groundwater level declines.
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Rio Rancho Direct Injection
- Reclaimed wastewater
- Advanced oxidation treatment
- Injection well
- Full-scale operations (permit issued May 2015,
injection began May 2017)
- Full Scale permitted for up to 1.0 million gallons per
day and a maximum of 1,000 acre-feet per year
- Currently evaluating potential sites for additional
injection wells
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Rio Rancho: Reuse and Recharge
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Advanced Water Treatment
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Cabezon Water Reclamation Facility
Secondary Treatment Filtration Advanced Treatment Direct Injection Non-Potable Reuse Surface Infiltration (originally)
AOP and GAC
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MBR-AOP-BAC Testing Objectives
Membrane Bioreactors (MBR) provide excellent pathogen / solids removal after four years of operation. Advanced Oxidation Process (AOP) to destroy trace organics (endocrine disruptors/ pharmaceuticals / personal care products), and chemically degrade Effluent Organic Matter (EffOM). Use granular / biologically activate carbon (GAC / BAC) to produce stable, finished water for aquifer recharge by direct injection.
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Membrane Bioreactors
(MBRs)
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Advanced Water Treatment Evaluation
- Pilot test for permitting, validation of treatment concept,
capital and O&M cost projections.
- Water quality testing to evaluate contaminant removal
through each treatment process.
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Trace Constituent Concentration (ng/L)
2 ppm ozone 6 ppm ozone Average MBR effluent 4 ppm ozone 8 ppm ozone
Trace Constituents (ppt)
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Bromate Control
AOP: Bromate Formation
2 4 6 8 10 12 14 16 18 20 22 24 1 2 3 4 5 6 7 8 9 Ozone Dose (ppm) @ MR = 0.7 [BrO3-] / ppb 1 Injector 3 Injectors MCL
Ozone Only: Bromate Formation
2 4 6 8 10 12 14 16 18 20 22 24 1 2 3 4 5 6 7 8 9 Ozone Dose (ppm) @ MR = 0.7 [BrO3-] / ppb 1 Injector 3 Injectors MCL
AOP: Mole Ratio Study
2 4 6 8 10 12 14 16 18 20 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 MR H2O2:O3 [BrO3-] / ppb 4 ppm O3 5 ppm O3 6 ppm O3 MCL
Photo: Air Products, Inc.
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Direct Injection Facility
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Injection Well Design
- Total depth - 1750’ bgs
- 26-inch borehole
- 16-inch casing
- Downhole flow control valve by
Baski
- Submersible pump for
backwashing
- Depth to water - 565’
- Submersible pump at 900’ (250
HP)
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Facility Isometric
backwash tank raw water tank treated water tank GAC/BAC AOP
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Direct Injection Facility Operations
- 3rd year of full
scale operation
- Shut down
much of 2018 for treatment maintenance
- Operating
currently at about 0.5 MGD
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Cumulative Storage Volumes (AF) Injected in AR-1 Well
Date AR-1 Recharge Backwash Net Recharge 7/19/2013(Demonstration) 27.6
- 27.6
Sub-Total 2017 28.6 7.4 21.3 Sub-Total 2018 29.7 3.9 25.8 Partial Sub-Total (Jan - Sept) 2019
- 152.8
Total Storage
- 279.5
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Monitoring & Reporting
NMED Permit: Rio Rancho Direct Injection Aquifer Recharge Demonstration, DP-1650 Documents Submitted Prior to Start of Injection
- Written notification to NMED stating the date the discharge will
commence.
- Record drawings for the constructed facility (with seal and signature
- f P.E.)
- Log removal documentation
- Description of the distribution system infrastructure (between
Cabezon WRF and Advanced Water Treatment Facility)
- Confirmation of totalizing meter installation from the AWT Facility
to the injection well, including meter type, calibration, and location information.
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Monitoring & Reporting
Water Analysis and Reporting
- Quarterly monitoring reports to be submitted to NMED as follows:
– First quarter: January 1 through March 31 - report due by May 1 – Second quarter: April 1 through June 30 - report due by August 1 – Third quarter: July 1 through September 30 - report due by November 1 – Fourth quarter: October 1 through December 31 - report due by February 1
- The discharge permit includes an attachment, Table 1, of Most Stringent
Enforceable Standards (MSES), a subset of which must be monitored on a quarterly basis, and the full suite must be monitored on an annual basis.
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Water Quality Monitoring
- Continuous monitoring within
well house
– Temp, pH, specific conductance, turbidity, chlorine residuals – Flow rates, total injection, backwash volume
- Extensive testing of water quality
using site monitor wells
– Most Stringent Enforceable Standards list
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Groundwater Level Monitoring
- Injection well AR-1
- Site monitor wells MW-1A, MW-
1B, MW-1C, MW-2, and MW-3
- Offsite city wells 4, 10, and 21
- USGS Lincoln Middle School
nested piezometer
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1/7/2020
4,700 4,750 4,800 4,850 4,900 4,950 5,000 5,050 5,100 Water Level (feet above mean sea level)
MW-1A MW-1B MW-1C MW-2 MW-3 AR-1
Water Level Monitoring
City of Rio Rancho Direct Injection Project Water Table Elevations, 2019
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Groundwater Elevations - Before
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Groundwater Elevations - After
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