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.