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, NMSA 1978). – Conjunctive use of surface water and groundwater are essential to the effective and efficient use of the state’s limited water supplies.

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.

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.

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

Rio Rancho Direct Injection Project

Background Mariposa WRF  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.

Rio Rancho Reclaimed Water Residential and commercial use Reinjection GW Reuse Supply Well Rio Grande Reclamation Source: Star Heights Park photo, City of Rio Rancho website

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.

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

Rio Rancho: Reuse and Recharge

Advanced Water Treatment

Cabezon Water Reclamation Facility Non-Potable Reuse Secondary Surface Filtration Infiltration Treatment (originally) Advanced Direct Treatment Injection AOP and GAC

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.

Membrane Bioreactors (MBRs)

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.

Trace Constituents (ppt) 350 300 Concentration (ng/L) 250 200 150 100 50 0 e l ) l l e x e l T T e n e l l * e r d e e e e e P e e n o o a o i a e e o n o n n z n n n n n C E i d i t n l E n a n l t d t x c a o v o o d s i i i d i i n i i o i i i i s h e b E p e A i e p o A m a s m z x z C m l t n a r i l a m d o t h a l f e r i b h c e a o a y a D D n e f b d l i a T o l p c i h p t a z i s i o o r m i h i c t t e D f o d h a i r o p i b r p l t A u a o m I d m t i C a r b x y n f a e t r s o o i o B m i r p i r a T n C n e L f o l a i u a P m y o L r l f e r e o u a o G p u l h a F n I i u h e S h N q b r e d t C S T d e M a T - - r f i a y o m 4 m f h l l C u c i e e D e S D s - M ( 7 , n 1 i l l i c i x o m A Trace Constituent 2 ppm ozone 6 ppm ozone Average MBR effluent 4 ppm ozone 8 ppm ozone

Bromate Control AOP: Mole Ratio Study Ozone Only: Bromate Formation 20 1 Injector 18 24 3 Injectors 16 22 [BrO3-] / ppb 20 14 4 ppm O3 18 [BrO3-] / ppb MCL 16 12 5 ppm O3 14 12 10 6 ppm O3 10 8 8 MCL 6 6 4 2 4 0 2 1 2 3 4 5 6 7 8 9 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Ozone Dose (ppm) @ MR = 0.7 MR H2O2:O3 AOP: Bromate Formation 1 Injector 24 3 Injectors 22 [BrO3-] / ppb 20 18 MCL 16 14 12 10 8 6 4 2 0 1 2 3 4 5 6 7 8 9 Ozone Dose (ppm) @ MR = 0.7 Photo: Air Products, Inc.

Direct Injection Facility

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)

Facility Isometric backwash tank GAC/BAC treated water tank AOP raw water tank

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

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

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 of 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.

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.

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

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

Water Level Monitoring 5,100 5,050 5,000 Water Level (feet above mean sea level) 4,950 4,900 4,850 4,800 4,750 4,700 MW-1A MW-1B MW-1C MW-2 MW-3 AR-1 City of Rio Rancho Direct Injection Project Water Table Elevations, 2019 1/7/2020

Groundwater Elevations - Before

Groundwater Elevations - After

Questions?