OWEA Aurora, Ohio

June 20th, 2012

UV-OXIDATION: TREATING WASTEWATER TO

DRINKINGWATER FOR SUSTAINABLE WATER

REUSE

UV/UV OXIDATION BASICS

WHAT IS UV LIGHT?

Ultraviolet (UV) light is

invisible to the human eye

UV is comprised of

electromagnetic radiation of

wavelengths ranging from

10 nm to 400 nanometers

(nm)

Certain wavelengths of UV

light are germicidal – meaning

they can neutralize

microorganisms

UV light penetrates the cell wall

The UV energy permanently alters the DNA structure of the microorganism

The microorganism is “inactivated” and unable to reproduce or infect

HOW DOES UV DISINFECT?

UV Energy

DNA

Nucleic Acid

Cell Wall

Cytoplasmic

Membrane

THE

INTERCONNECTED

WATER SUPPLY

Sources of contaminants in our water supply:

- Industrial discharge

- Agricultural runoff (Nutrients increase in Algae Blooms Taste and Odor, Algal Toxins)

- Chemical releases

- Municipal wastewater

Injection

Well

Extraction

Well

“One city’s wastewater is

another city’s drinking water”

WHAT IS UV-OXIDATION?

It is the process of destroying trace organic contaminants in water by:

UV-Photolysis

UV light alone breaks down the contaminant molecules

UV-Oxidation

UV light plus hydrogen peroxide (H2O2)

Hydrogen peroxide absorbs UV and produces hydroxyl radicals that

oxidize contaminants

UV-PHOTOLYSIS

Chemical bonds are

broken by UV light

UV-OXIDATION

Hydrogen

peroxide

Hydroxyl

radical

Chemical bonds are

broken by hydroxyl

radicals

UV-PHOTOLYSIS / UV-OXIDATION BALANCE

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

1,4-Dioxane NDMA Atrazine Geosmin

UV

-Ph

oto

lysis

/UV

-Oxid

ati

on

Co

ntr

ibu

tio

n t

o T

ota

l

Co

nta

min

an

t R

ed

ucti

on

(R

ela

tive t

o A

trazin

e)

UV + 10 ppm H2O2

Photolysis

TREATABILITY OF STEROIDS

Testing Performed in Partnership with Southern Nevada Water Authority – Special Thanks to Dr. Shane

Snyder

Testing Performed in Partnership with Southern Nevada Water Authority – Special Thanks to Dr. Shane Snyder

TREATABILITY OF ANTIBIOTICS

LAMP TECHNOLOGY

A WORD ON LAMP TECHNOLOGY

UV lamps are characterized by the mercury vapor pressure inside the

lamp, and the UV energy they produce:

Low-Pressure (LPHO)

This category includes amalgam lamps: an efficient, high output UV light source

Medium-Pressure

Extremely high UV output; capable of treating significant flow volumes

REACTOR DETAILS

REACTOR DETAILS LPHO

• Lamp power and number of

reactors in operation

automatically adjusted to

minimize power

• Reactors can be oriented 1-, 2-,

or 3-high for small footprint

• 250W LPHO lamp efficiently

treating contaminants year round

Two lamp bundles per chamber

(one accessed from each end)

Influent Port

Effluent Port

REACTOR DETAILS LPHO

REACTOR DETAILS MP

• Lamp power and number of

reactors in operation

automatically adjusted to

minimize power

• Reactors EPA validated for AOP

• Typical application for seasonal

T&O control

PWN – Drinking Water

IPR vs. DESALINATION: SUSTAINABLE WATER REUSE

BENEFITS

• No brine discharge

• Lower energy costs

• Lower capital and operating costs

• WWTP is negative cash flow to municipalities

• Additional treatment converts wastewater to drinking water standards - Negative cash flow becomes a revenue/credit stream

• Wastewater is no longer entering the environment – reduction of contamination to other WTP, feminization of fish, male sperm counts in Great Lakes watershed

IPR CASE STUDIES

IPR INSTALLATION - ORANGE COUNTY, CALIFORNIA

IPR INSTALLATION - ORANGE COUNTY, CALIFORNIA

70 MGD (100 MGD peak) California facility treating wastewater to drinking water standards for groundwater replenishment

Water is injected (to protect from seawater) and percolated (to replenish) into the aquifer

MF/RO/UV-Oxidation treatment train (UV system uses monochromatic amalgam lamps)

Orange County’s Water Factory

21 pioneered the use of UV-

oxidation.

FULL-SCALE TESTING - ORANGE COUNTY, CA

0

10

20

30

40

50

60

70

80

1 2 3 4 5 6 7

Run #

[ND

MA

], p

pt

[NDMA], Inf

[NDMA], Eff

4 Reactors On

6 Reactors On

Flow: >8.5 MGD

DEMONSTRATION TESTING - ORANGE COUNTY, CA

Influent MS2Effluent MS2

0.000

1.000

2.000

3.000

4.000

5.000

6.000

Lo

g (

pfu

/mL

) M

S2

INSTALLATIONS AUSTRALIA

Severe drought – Country

wide

Lack of water supply planning

Driving a >AU$2 billion

investment in water projects

over the next 18 months

IPR, Conservation, Desal

Western Corridor Water

Recycling Projects (Brisbane)

– MF/RO/UV-oxidation

20 MLD Queensland, Aus facility

treating wastewater for addition to

local reservoirs

Water will be added to dams to

augment surface water supplies

MF/RO/UV-Oxidation treatment

train (UV system uses

monochromatic amalgam lamps)

The TrojanUVPhox™ at Bundamba 1A

IPR INSTALLATION – BUNDAMBA AWTP, BRISBANE, AUS

NDMA – MEASURED POST RO AT BUNDAMBA*

* Poussade, Y; A. Roux, T. Walker and V. Zavlanos. Advanced Oxidation for Indirect Potable Reuse – A

Practical Application in Australia. Presented at OzWater 2009.

NDMA – TREATED AT BUNDAMBA

* Poussade, Y; A. Roux, T. Walker and V. Zavlanos. Advanced Oxidation for Indirect Potable Reuse – A

Practical Application in Australia. Presented at OzWater 2009.

CONCLUSIONS

• Technical Conclusions

– Both MP and LPHO lamps effectively produce hydroxyl radicals

– LPHO lamps more efficient according to theory and practice

• Sustainability Conclusions

– IPR builds on existing WWT infrastructure converting a cost to revenue

– IPR less energy intensive than desalination

– No wastewater discharge to increasingly sensitive rivers and lakes

Questions?

Terry Keep

Sales Manager - ECT

TrojanUV

(519) 457-3400

tkeep@trojanuv.com

www.trojanuv.com