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An Introduction
February 11, 2015
Celebrating Over 80 Years
ESTABLISHED IN 1933
BY JOHN CAROLLO IN
PHOENIX, ARIZONA
2013
OVER 600 EMPLOYEES
NATIONWIDE
Dedicated to advancing the application
of water science and technology
If it involves Water, We do it!
60 employees in Texas
FORT WORTH
AUSTIN
HOUSTON
DALLAS
A few of our Texas Clients
Carollo’s Research Group
25 PhD’s & specialists
Completed over 130 applied research
projects in last 5 yrs
10 RO/NF Pilot Studies of Brackish
Water in last 5 years
In last 10 years we designed/constructed over
$1B of brackish water treatment facilities
165-mgd
(Largest NF Brackish Plant in the World)
3-mgd
San Angelo Hickory Creek Water
Supply Project
This project involved complex
interdependencies
Water
Quantity
Water
Quality
TreatmentWellfield
Conveyance
Funding/
Financing
Size Material
Route
Pumping
Costs
Power/Utility
Availability
Treatment
Process
Treatment
Location
Waste
Handling
Overview of project elements
Carollo led San Angelo to secure the single-largest TWDB WIF loan
$120 Million Loan
Advanced treatment of groundwater
3D Design Benefits
Construction nearing completion
Efficient Groundwater Treatment Using Two-Stage, Fixed-Bed Biotreatment
Co-occurrence of multiple groundwater contaminants is common
http://www.adedgetechnologies.com/images/USGS%20County%20map.jpg, http://siteresources.worldbank.org/INTSAREGTOPWATRES/Resources/WLD33757.jpg, http://pubs.usgs.gov/fs/1996/fs-092-96/fs092-96.html , http://static.ewg.org/reports/2010/chrome6/html/home.html,, http://energy.usgs.gov/OtherEnergy/Uranium.aspx
Perchlorate
Nitrate Hexavalent Chromium
VOCs
Existing best available technologies
Membranes Ion
Exchange
GAC
Liquid Phase
Gas Phase
(w/ Air
Stripping)
Conventional
Single Use
Resins
NF/RO EDR
Pressure Electrical
Remove NO3-, ClO4
-, Cr(VI), VOCs
Other
RCF Oxidation
UV/AOPMultiple
AnoxicBioreactor
Backwash wastewater to settling lagoon or sewer
Aerobic Biofilter
PolymerNutrients
Degas (if necessary)
Reox. Chlorine
Disinfection
Backwash
Well(s)
Biologically-tailored, two-stage treatment approach : meets water quality objectives and incorporates optimization
Bacteria oxidize and reduce contaminants to generate energy and grow
Nutrients (P, NH3)
Organic carbonNH3
Mn2+
Fe2+
O2
NO3-
ClO4-
Cr(VI)VOCs
CO2, N2, Cl-, Cr(III)s
NO3-, Mn4+, Fe3+
EPS
Fixed-bed biological treatment is based on conventional granular media filtration
Granular Media Filter
Fixed-Bed Bioreactor
+ =
Chlorine
Biotreatment addresses many challenges
Contaminant
destruction
High water
recovery
Multiple
contaminants
Low energy/
ops costsNatural & Sustainable
ProcessRobust
Pilot skids range from 0.4-25 gpm
10-25 gpm
2-6 gpm
0.4-2 gpm
Sustained nitrate removal
Perchlorate removal performance is
independent of raw perchlorate
concentration
0
10
20
30
40
50
60
70
80
90
100
0
100
200
300
400
500
600
700
800
900
1000
0 2 4 6 8 10
Influent
Effluent
In
flu
en
t C
lO4
-(g
/L)
Days of Operation
Eff
luen
t C
lO4
-(g
/L)
Perchlorate MCL
Cr6+ removal to below 0.1 µg/L was
observed
Efficient PCE removal observed
BIOTTTA™ is modular…
•Standardized
systems
•Skid mounted
•Patent pending
control system
•Remote monitoring,
alarming, and
control available
Summary
Efficient removal of multiple contaminants can be achieved while avoiding add-on unit processes.
System is robust.
Design is modular and flexible.• Can be converted to/from other pressure-vessel-based
systems.
• Can be used as pre-treatment to expand capacity of downstream unit processes
Regulatory approval in place for nitrate and perchlorate.
Regulatory approval for VOCs and Cr(VI) target of current projects.