+ All Categories
Transcript
Page 1: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik OnLine Spectrometry from Drinking Water to Waste Water

UV/Vis Spectrometry

For

Drinking Water Security Applications

SWIG - „Security of Drinking Water Supplies“

January 25th, 2006

by Joep van den Broeke

s::can™

Page 2: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 2 OnLine Spectrometry from Drinking Water to Waste Water

Drinking Water Security - Introduction

Types of Risks

• natural risks (flooding, turbidity, algal blooms etc.)

• anthropogenic risks (accidents, inadvertent

discharges/spills, and “intentional discharges”)

• Real time monitoring systems are the answer to detect low

probability / high impact risks in an early stage, other

than chronic or long term risks that can be monitored by

occasional sampling and laboratory analysis.

• Real time monitoring system are the answer for continuous

monitoring and control of (treatment) processes

Page 3: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 3 OnLine Spectrometry from Drinking Water to Waste Water

Nature of Contamination

• Chemical Contamination

• Microbial Contamination

• Radioactive Contamination

Monitoring Strategies

• direct measurement of toxicity

• measurement of specific substances or organisms

• measurement of characteristics / deviations from a reference

status

Drinking Water Security - Introduction (II)

Page 4: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 4 OnLine Spectrometry from Drinking Water to Waste Water

The Sprectrometric Process Analyser - HOW DOES IT WORK?

Lampen-Steuer-elektronik mit Xenon Blitzlampe

lamp controlelectronics withXenon flash lamp

256 pix array detector with µ-processor electronics

256 pixel array Detektor mit µ-Prozessor Elektronik

Str

ahls

ele

kto

rb

ea

m s

ele

cto

r

Em

pfa

ngsoptik

colle

cting o

ptics

Sendeoptik

em

itting o

ptics

Meßstrahlmeasuring beam

Referenzstrahlreferencing beam

Ein

sätz

e z

ur

Verk

ürz

ung

des M

ess-P

fades

insert

s fo

r ad

apta

tion

of optical path

Rein

igungsdü

sen

cle

anin

g n

ozzle

s

Page 5: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 5 OnLine Spectrometry from Drinking Water to Waste Water

The Spectrometric Analyser - The measuring principle

Page 6: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 6 OnLine Spectrometry from Drinking Water to Waste Water

0,00

0,01

0,02

0,03

0,04

0,05

240 260 280 300 320 340 360

wavelength [nm]

sig

nal

bank filtrate

drinking water

The Spectrometric Analyser - The measuring principle (II)

Page 7: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 7 OnLine Spectrometry from Drinking Water to Waste Water

The Spectrometric Process Analyser – What Does It Do?

1 Single substance detection

Nitrate (> 1 ppb), Nitrite (> 10 ppb), Benzene (> 100 ppb),

Toluene (> 50 ppb), Xylene (>50 ppb), Phenol (> 50 ppb),

LBS, Turbidity, Solids, Colour, and many more ...

2 Group parameter monitoring

DOC (> 5 ppb), TOC (> 10 ppb), Turbidity (> 0,1 FTU), Oil-

in-Water, and many more ...

3 Qualitative and alarm parameter monitoring

„Fingerprints“ , „Delta Spectrometry“, Derivative

Spectrometry

Page 8: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 8 OnLine Spectrometry from Drinking Water to Waste Water

Source Water Protection – An Example

Vienna Waterworks

Page 9: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 9 OnLine Spectrometry from Drinking Water to Waste Water

Information from the Fingerprint

Background spectrum

Sample

Differential spectrum

Page 10: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 10 OnLine Spectrometry from Drinking Water to Waste Water

Alarm System Based on On-line Spectrometry

• The software ”learns” the shape

and features of the ”normal”

spectrum of the water body in a

defined range.

• Definition of reference - or baseline - for later identification of

extraordinary composition.

• Absorption spectra, or 1st derivative thereoff, used to detect

deviations from ”normal” spectral pattern.

STEP 1: Learning Period

Page 11: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 11 OnLine Spectrometry from Drinking Water to Waste Water

Alarm System Based on On-line Spectrometry (II)

STEP 2: Alarm Level and Sensitivity

Definition.

• Alarm levels are based on empirical

evaluation

• Water systems that do not suffer

severely from anthropogenic impact

show uniform spectra.

• 8 groups of virtual contaminants defined (KW1, KW2, KW3 ...)

to cover the whole range of organic contaminants visible in the

UV-Vis-spectrum.

• Sensitivity can be adjusted according to acceptable false

alarm frequency.

© s::can Messtechnik GmbH

Page 12: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 12 OnLine Spectrometry from Drinking Water to Waste Water

Alarm System Software - Screenshot

© s::can Messtechnik GmbH

Level 1

(Autosampler triggered)

Level 2

(immediate action needed)

Page 13: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 13 OnLine Spectrometry from Drinking Water to Waste Water

Drinking Water Applications

river water monitoring:-

"suitability of surface water for drinking water production"

alarm systems- early warning- DOC_eq.- Nitrate_eq.- pollutants_eq.- turbidity

bank filtrate monitoring:- filter effectivity - by - alarm - DOC_eq.- Nitrate_eq.- pollutants_eq.

turbidity meas.

well water monitoring:- suitability for drinking - water production- - alarm- DOC_eq.- Nitrate_eq.- pollutants_eq.

turbidity

monitoring, oper-ation and control of treatment plant:- turbidity- DOC_eq.- oxidation by-products- OxBP-precursors- effectivity of filters- effectivity of Adsorp.- Flocculation- Nitrate_eq.- pollutants_eq.- spectral control

monitoring, operation and control of ground water recharge:- turbidity

- DOC_eq.- Nitrate_eq.- pollutants_eq.- spectral control

monitoring of drinking water distribution system:turbidityDOC_eq.Nitrate_eq.hygienic riskspollutants_eq.

© s::can Messtechnik GmbH

Page 14: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 14 OnLine Spectrometry from Drinking Water to Waste Water

Further Developments

New Features for Process Control and Alarm Software

• Full spectral analysis instead of virtual parameters

• Collection of data from multiple instruments in central database and

on-line evaluation of all data stream into this database

(spatially resolved delta spectrometry)

• Time resolved delta spectrometry

Page 15: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 15 OnLine Spectrometry from Drinking Water to Waste Water

What Does Delta Spectrometry Offer?

..... monitoring stationsCharacteristicOnLine-Delta-Spectraserve as Trigger Input forAlarm and Early Warning

wavelength nm

absorp

tion 3

2

1

diffe

rential

absorp

tio

n

wavelength nm

0,3

0,2

0,1

0

-0,1

wavelength nm

absorp

tion 3

2

1

wavelength nm

ab

so

rptio

n 3

2

1

wavelength nm

absorp

tion 3

2

1

Tele

met

ry

Tele

metry

Telemetry

Main Station

© s::can Messtechnik GmbH

Page 16: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 16 OnLine Spectrometry from Drinking Water to Waste Water

0

2

4

6

8

10

12

14

16

18

20

200 300 400 500 600 700

Wavelength [nm]

Exti

ncti

on

[A

bs/m

]

Potential of UV/Vis spectrometry in Detection of Intentional Contaminations

Detection limits in drinking water (KIWA & RIVM test reports)

compound detection limit

Isoproturon

Aldicarb

0,05 mg/L

0,1 mg/L

Oxamyl 0,1 mg/L

Aflatoxine

LSD

Methamidophos

0,2 mg/L

0,5 mg/L

1 mg/L

Azinphos – methyl 2 mg/L

nerve gas simulants 0,1 – 50 mg/L

Page 17: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 17 OnLine Spectrometry from Drinking Water to Waste Water

Spectrometric Multiparameter Analyser - An Established Technology

The Submersible Spectrometric Analyser:

• Over 600 installed worldwide

• Simple installation (submersed; by-pass; flange; bucket etc.)

• Field compatible, independent (12V), data logger inside

• self cleaning - no maintenance

• High Accuracy of Measurement because InLine / no pipes, no pumps, no filter etc.)

• Inexpensive in operation

• Parameters: SAC, COD, BOD, Nitrate, Nitrite, Turbidity, BTX, Phenols, etc. - all at the same time !

• Indirect method, must be calibrated properly in process

• Water Quality Monitoring through fingerprint analysis

• Available only from s::can at 8.000 to 15.000 Euro / USD

Page 18: UV/Vis Spectrometry For Drinking Water Security … · Drinking Water Security Applications SWIG - „Security of Drinking Water Supplies“ January 25th, 2006 by Joep van den Broeke

www.s-can.at Copyright s::can Messtechnik 18 OnLine Spectrometry from Drinking Water to Waste Water

THANK YOU FOR YOUR ATTENTION

s::can Messtechnik GmbH

Brigittagasse 22-24

1200 Vienna, Austria

Tel: +43 1 219 73 93

Fax: +43 1 219 73 93 14

E-mail: [email protected]

www.s-can.at


Top Related