Annual Conference Brochure - AZ Water Association

TECHNICAL SESSIONS
for aquifer recharge or indirect potable reuse. AOP differs
in the method of generation of hydroxyl radicals, the
primary agents of contaminant destruction. Learn how the
production and fate of radicals generated via UV-dependent
breakdown of hydrogen peroxide is analyzed mathematically
to establish near-steady levels of radical concentrations and
predict rates of disappearance of residual trace organics in
treated waters. In its current form, the model can be used
to optimize aspects of design and operation of UV/peroxide
treatment systems.
9:30 - 10:00am
Bioremediation of Uranium in an Anaerobic
Biofilm Reactor
Jim Field, University of Arizona
Groundwater contamination with hexavalent uranium
(U(VI)) poses an environmental health risk due to
chemotoxicity causing damage to kidneys after long-term
exposures. Reductive precipitation of soluble U(VI) to
insoluble tetravalent uranium (U(IV)) in the form of the
mineral uraninite (UO2) is one of the more promising
approaches to uranium remediation. The objective of this
study was to evaluate whether methanogenic biofilms from
high rate anaerobic wastewater treatment reactors have the
capacity to catalyze the reductive precipitation of uranium
and be applied as a treatment technology for removing
uranium from groundwater. Two methods were used to
confirm the presence of uraninite as the dominant species
of uranium accumulating in the solid phase.
10:30 - 11:00am
An Analysis of DOC Removal at CAVSARP and the
Potential for Groundwater Recharge in the Phoenix
Metropolitan Area
Sean Wilson, Arizona State University
The organic carbon removal capacity of CAVSARP was
evaluated using the historical data. CAVSARP is a
groundwater recharge project that is actually providing
water treatment, since the water is recovered for potable
purposes. The evaluation of CAVSARP was extrapolated to
determine how groundwater recharge could enhance water
quality in the Phoenix Metropolitan Area.
11:00 - 11:30am
Scale Control in a Simulated Cooling Tower Using a
Physical Water Treatment Device
Tiffany Yee, Arizona State University
Decreasing water use in cooling towers can be done by
increasing the cycles of concentration which usually requires
chemical treatment to prevent scale formation. A simulated
cooling tower was operated with and without a physical
water treatment device to determine if scaling could
be prevented at increasing cycles of concentration. The
potential for the physical water treatment device to remove
existing scale was also evaluated.
11:30 - 12:00pm
An Evaluation of Alternatives to Domestic Ion
Exchange Water Softeners
Mara Ramos, Arizona State University
Domestic Ion Exchange water softeners limit the ability to
reuse water for many applications. Four different alternative
technologies were evaluated for their ability to prevent scale
formation in a water heater using three different water
sources. All of the technologies were capable of reducing
scale formation, and two of the technologies were very
effective.
1:30 - 2:00pm
Development of A Catalytic Ozonation Fixed Bed
Reactor for Advanced Treatment of Wastewater Using
Titanium Dioxide
Michelle Barry, Arizona State University
This research focuses on reactor design of a catalytic
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ozonation system as an advanced treatment process. More
specifically, the goals are to: (1) develop a model of a
fixed-bed reactor; (2) conduct bench scale tests to identify
catalyst and ozone concentrations for optimal reaction
rates; and (3) develop and test a bench-scale fixed bed
reactor design.
2:00 - 2:30pm
Photocatalytic Nitrate Reduction
Kyle Doudrick, Arizona State University
Nitrate is a prevalent pollutant in groundwater and is often
a reason limiting the use of these local resources. Research
into reducing nitrate to nitrogen gas during photolysis in the
presence of commercially available and tailored titanium
dioxide catalysts are discussed with the initial eye towards
treating ion exchange brine.
2:30 - 3:00pm
Removal of Engineered Nanomaterials During
Wastewater Treatment
Yifei Wang, Arizona State University
Engineered nanomaterials from titanium dioxide, nanosilver
and others are or will be entering our wastewater systems.
Understanding the ability to remove these potential
emerging pollutants is the focus of this talk. Specifically, the
talk focuses on long-term operation of a sequencing batch
activated sludge reactor exposed to nanomaterials.
3:00 - 3:30pm
Removal of Emerging Pollutants in Constructed
Wetlands
Fariya Sharif, Arizona State University
This presentation will include a background primarily stating
the purpose of the study. An overview of the existing
wetlands will be presented which will include the design
features and removal trends for bulk and trace pollutants.
Selected target compounds will be presented with the
justification for their selection, physico-chemical properties
and the analytical strategies used for quantification.
Details of the laboratory experiments will be included
in the presentation. Wetland mesocosms, abiotic and
biotic experiments will be briefly discussed. Data from the
experiments will be presented to determine the relationships
between design hydraulic loading rates and emerging
compound removal. Based on the experimental data, abiotic
and biotic processes will also be evaluated for the selected
compounds. Scope for the future work will be addressed.
TRACK 4 - APPLICATIONS IN
HYDRAULIC MODELING
8:00 - 8:30am
Hydraulic Modeling: An Important Process in a Water
Infrastructure Master Plan
Nabin Khanal, ARCADIS / Malcolm Pirnie, Inc.
This presentation will stress on the importance of hydraulic
modeling in a water infrastructure master planning process.
8:30 - 9:00am
Using Water Distribution System Modeling, DBP
Modeling, and SDS Testing of CAP Water to Develop
an Optimum Water Quality Solution for the Ak-Chin
Indian Community
Lisa Snyders, Carollo Engineers
The Ak-Chin Indian Community has historically utilized
groundwater as the primary source of potable water.
However, continued deterioration of groundwater quality,
recent struggles associated with identifying and obtaining
a new high quality groundwater source, and availability of
a Central Arizona Project (CAP) surface water supply have
prompted the Community to design and construct a new
surface water treatment plant (SWTP). This presentation will
describe how distribution system modeling, DBP formation
modeling, and water quality sampling and testing of the
CAP surface water were successfully combined to develop
optimum DBP mitigation strategies including enhanced
coagulation, Granular Activated Carbon (GAC) contactors,
and various distribution system operational strategies.
9:00 - 9:30am
Agua Fria Optimization Study for Arizona American
Water Company
Pranam Joshi, NCS Engineers, Alex Louisetto, Arizona
American Water Company
A hydraulic model was created for Arizona American Water
Company to develop a strategy for incorporating a new
surface water treatment plant into the Agua Fria Water
District (AFWD) service area. AFWD has groundwater sources
as well as the new surface water treatment plant. The
purpose of the model was to identify cost optimal solutions
that satisfy demands, maintain water quality, and balance
the system’s numerous constraints. The model used data
from the SCADA system and data collected in the field.
Calibration was done using real data from locations in the
distribution system. A genetic algorithm was created to find
the optimal solution.
9:30 - 10:00am
Water Distribution System Supply Reversal: The Town
of Payson Conversion from a Multiple Groundwater
Well Supply to a Single Source by the Flip of a Switch
Tanner D. Henry, Tetra Tech, Inc.
The Town of Payson Water Distribution system currently
serves approximately 17,000 people with drinking water
from 42 active groundwater wells. As a part of the Arizona
Water Settlement Act, the Salt River Project acquired the
C.C. Cragin Reservoir and infrastructure from Phelps Dodge
Corporation. Accordingly, the C.C. Cragin reservoir became
a viable alternative for supply of 3,000 acre-feet of water
being delivered for nine months per year. Tetra Tech, Inc.
developed a plan to reverse flow to the existing 25 pressure
zones, 10 booster stations, and 12 storage tanks with
minimal infrastructure. The proposed infrastructure will
convert the system annually to the new single source by
activating a single booster station. The presentation will
cover the evaluation of the existing system, planning, and
modeling of the proposed design.
10:30 - 11:00am
Two Approaches for Identifying Optimal Water
Security Monitoring Station Locations in the
Distribution System Using TEVA-SPOT
Brad Jeppson, Carollo Engineers
Learn about the advantages and disadvantages of two
methods for optimizing on-line distribution system security
monitoring using TEVA-SPOT software tool.
11:00 - 11:30am
City of Scottsdale Wastewater Model Update
Bill Roberts, GHD, Inc.
This presentation focuses on the lessons learned by GHD
Inc and the City of Scottsdale during the recent update
of the City’s wastewater model. The model now reflects
the economic changes that have occurred over the last
five years and illustrates the importance of accounting for
Rain Derived Infiltration and Inflow (RDII). The recent
loading revisions were based on billing data allocated within
the model using GIS information. Those flows were then
calibrated with data collected at more than 35 meter sites
throughout the City’s collection system. GHD also created
current day and future built out models with steady state
and extended period scenarios that addressed wet weather
flows and RDII using model generated storms that were
calibrated against recorded data.
AZ Water Association 84th Annual Conference & Exhibition Arizona’s Water Future is Here!