SIGRIST APPLICATIONS IN THE BEVERAGE INDUSTRY Turbidity and colour measurement in breweries

SIGRIST APPLICATIONS IN THE BEVERAGE INDUSTRY

Turbidity and colour measurement in breweries

S. 2

Parameters to be controlled:

» Measurement of turbidity» Measurement of colour» Phase separation / CIP

Applications:

» Breweries, Wineries, Distilleries» Mineral Water, Soft Drink Industry» Dairy Industry

SIGRIST in the beverage industry

Turbidity Measurement

Measuring principle & particularities

S. 4

Turbidity measurement - particularities

» Turbidity in liquids is caused by the presence of undissolved matter such as particles, air bubbles, etcetera

» Turbidity can be determined by measuring scattered light

S. 5

Turbidity measurement - particularities

Scattered light intensity depends on:

» Concentration

» Particle size

» Particle shape

» Scattering angle

» Wavelength

L1L2

LS

St

STSt

St

St

St

St

St

St

S. 6

» Light propagation in a homogeneous medium (A)

» In the presence of a particle (B)

Turbidity measurement principle

B

A

S. 7

Dual angle measurement

» Dual angle scattered light measurement to characterize particle size distribution

» Introduced by Sigrist in 1988

d =5u

d =0.05u

90°

I(90)

25°

I(25)

101

102

103

104

105

0

0

S. 8

Angular distribution of scattered lightfor different materials

S. 9

Turbidity in beer according to MEBAK / EBC

Measurement of turbidity / particle concentration by scattered light

» Scattering angle: 25° / 90°

» Wavelength: 650nm 30 nm

» Calibration with Formazine in EBC

TurBiScat and SICON

Sigrist new generation of online turbidity monitoring

S. 11

Concept

» TurBiScat: single or dual angle inline turbidimeter for installation in a Varivent® or compatible housing

» Removable electronic section with quick lock

» Turbidity measurement with colour compensation

» Sealless design, maintenance-free» Separate control unit SICON with

touch screen and colour display » Operation with 24VDC (only)» Optional available colour

measurement» Extended sensor check function

with fouling control» Easy checking with secondary

standard» Data logging on SD-card» Various communication interfaces

S. 12

Sealless Design

Hastelloy C-22

Sapphire Windows

Stainless steel

Construction

S. 13

Varivent® Housing

Electronic Section

Sensor Head

Quick Release Button

Construction

S. 14

Optics - Absorption

» Optional colour measurement

» 430 nm, interference filter complying to EBC/MEBAK

» Max. 50 colour-EBC

S. 15

Secondary reference standard for calibration check

Construction

S. 16

Technical Data TurBiScat

» Sensor TurBiScat:› Measuring principle: 90°/25° Scattered light› Wavelength turbidity: LED 650nm (acc. to MEBAK)› Wavelength colour (option): LED 430nm (acc. to

EBC/MEBAK)› Measuring range turbidity: 0 .. 1000 EBC / 0 .. 4000 NTU› Measuring range colour: 0 .. 50 EBC› Sample temperature: -10 .. +100°C, 180°C with cooling

option› Cleaning: CIP/SIP compatible up to 120°C› Pressure: 10 bar / 100°C› Ambient temperature: -10 .. 50°C› Ambient humidity: 0 .. 100% R.H.› Protection degree: IP 66

S. 17

Technical Data SICON

» Control unit SICON› Power supply: 9 .. 30 VDC› Power consumption: 8 W› Display: ¼ VGA, 3.5”› Operation: Touch Screen› Ambient temperature: -10 .. 50°C› Ambient humidity: 0 .. 100% R.H.› Protection degree: IP 66› Outputs: 4x 0/4-20 mA, galvanic

separated, 7x digital outputs, 5x digital in-puts, freely configurable

› Digital Interface: Ethernet, SD-Card› Optional: Profibus DP, Modbus, Profinet

S. 18

10 Main Features

1. Maintenance-free design without seals2. Removable electronic section with quick lock3. Extended sensor check function with fouling control4. Dual-angle measurement with colour compensation5. Optional colour measurement6. Easy calibration check with secondary standard7. Control unit with colour touch screen display8. Variable display of measuring data, graphs, process

performance9. Smooth system integration using various communication

interfaces10.Data logging on SD-card

S. 19

Configuration

» A system consists of:› TurBiScat sensor› Calibration unit with solid reference› SICON control unit› Options:

» Colour measurement» Cooling option» Communication modules like Profibus, additional analog outputs

+ +

Color Measurement

Measuring principle

S. 21

Color Measurement Principle

-)

Light Source

Filter Photo-multiplier

Data Handling &Control System

S. 22

Color in beer according to MEBAK / EBC

» Measurement of colour by absorbance

» Path-length: 1 cm

» Wavelength: 430nm

» Calculation: Absorbance value * 25 = colour value in EBC

430 nm 1 cm

S. 23

Color measurement: ColorPlus

» Introduced in 2003

» Easy installation using a standard in-line housing, e.g. Varivent®

» Colour measurement at 430nm

» Optional turbidity compensation by second wavelength at 700nm

» Measuring range: 0 .. max. 200 EBC

» Accuracy: +/- 0.2 EBC for colour below 10 EBC

Application in the Brewing industry

S. 25

Brew-house applications

Turbidity after lauter tun

S. 26

Turbidity after whirlpool / separator

Turbidity after whirlpool/separator

S. 27

Trübung WK 1

0

20

40

60

80

100

120

140

160

180

200

16:

57:4

5

16:

59:0

4

17:

00:2

4

17:

01:4

3

17:

03:0

3

17:

04:2

2

17:

05:4

1

17:

07:0

1

17:

08:2

0

17:

09:3

9

17:

10:5

9

17:

12:1

8

17:

13:3

7

17:

14:5

7

17:

16:1

6

17:

17:3

6

17:

18:5

5

17:

20:1

4

17:

21:3

4

17:

22:5

3

17:

24:1

2

17:

25:3

2

17:

26:5

1

17:

28:1

0

17:

29:3

0

17:

30:4

9

17:

32:0

8

17:

33:2

8

17:

34:4

9

17:

36:2

0

17:

37:5

0

17:

39:2

1

17:

40:5

2

17:

50:2

4

17:

51:4

4

Zeit

EB

C

ber.Wert 1

Turbidity after whirlpool / separator

» Small amount of hot trub after the whirlpool improves the taste and the stability of the beer

Benefits:

» better taste» longer shelf time

S. 28

Yeast dosing

Yeast dosing :

» Benefits:

» Optimization of the fermentation

» shorter fermentation time

» save up to one day

S. 29

Phase separation yeast / beer after fermentation tank

Phase separation Yeast/Beer

» Benefits:

» Reduction of beer and yeast losses

» Improved filtration process

S. 30

Phase separation yeast / beer

Yeast Grop

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

Time

Ram

s v

alu

e

Part.-Conc.

Yeast grop GT19 until beer is detected

S. 31

Turbidity prefiltration / yeast sediment detection

Turbidity Prefiltration / Yeast Sediment detection

» Benefits:

» Improved filtration process

» Reduction of Kieselguhr consumption

S. 32

Turbidity measurement in filtration

Turbidity after Filtration

S. 33

Dual angle measurement in beer filtration

» 90°-value: 0,2 EBC ... 2 EBC» 25°-value: 0,05 EBC ... 0,2 EBC

» 25°-value smaller or equal to 90°-value:

satisfying operation of filterremaining turbidity by proteins, glucanes, etc.

» 25°-value higher than 90°-value: significant amounts of yeast and/or Kieselguhr in beer filter breakthrough; unsatisfying operation

S. 34

Dual angle measurement in beer filtration

» Optimization of filter monitoring and control in breweries:

› 90°: Optical beer clarity Small particles ( < 2μm )like proteins

› 25°: Control of filter breakthrough Big particles ( > 2μm )like yeast cells and Kieselguhr

» Benefit:One single instrument to measure 2 different parameters

S. 35

Color measurement

Color Measurement

» Color monitoring of final product

» Beer / caramel dosing control to adjust beer color

» Blending control of beer mix drinks

» Benefits:

» constant color» constant quality» constant blending

S. 36

ColorPlus: Installation

» Filtration line after KG or PVPP (color dosing before filter)

› Important: Watch response time!

» Blending units (dosing of water and beer) between filtration and BBT area

› Important: Dosing directly in front of the color monitor requires a static mixer!

S. 37

Phase separation beer / water / CIP

Phase separation Beer / Water / CIP

» Benefits:

» Reduction of beer losses» Reduced amount of waste water» Save of water in general » CIP checking

S. 38

Quality Control in the laboratory

S. 39

Turbidity measurement in the laboratory

» Measurement of beer clarity

» Accelerated aging

» Spot checks of brewing process

S. 40

Lab turbidimeter LabScat

» Measurement in bottles or cuvettes

» Measuring span:0-100 (500) EBC

» Dual-angle detection for analysis of particle size trends

» Color compensated detection in light and dark beers

» Bottle rotation and water bath minimize sources of error

» Best comparability to TurBiScat (In-line turbidimeter)

S. 41

LabScat: optical setup

» 650 nm LED light source

» 3 detectors for simultaneous 90° and 25° scattered light and transmitted light measurement

» Color and drift compensation by transmitted light measurement

S. 42

LabScat: data handling

» Data memory capacity of 999 readings

» Data storage with sample ID, date, time

» Enter sample ID via PC-keypad or barcode-reader

» Direct printing via Centronics interface

» Data transfer to PC via RS232 interface

S. 43

LabScat: Calibration

» Factory Formazine calibration

» Secondary glass standard for easy adjustment

» 10 linearization curves for different bottle types

Difference in the Turbidity Readings between Online and Lab Equipment

Why?

S. 45

Difference in the turbidity readings between online and lab equipment – Why?

» Wavelength:

MEBAK Standard is 650nm, general purpose lab units use mostly white light (400-1100nm)

» Color:Lab units with white light offer no colour compensation!

» Temperature:Even smallest temperature deviations can lead to major differences!

S. 46

Difference in the turbidity readings between online and lab equipment – Why?

» Gas Bubbles:

Measurements are done in open cuvettes. MEBAK recommends closed cuvettes.

» Measurements in bottles:

Bottle size and color has an impact on the measurement. Standard lab instruments have no option for correction.

» Other Issues:

Correct calibration, water bath, measuring angle, optical components

S. 47

Turbidity in beer according to MEBAK

» Measurement of turbidity/ particle concentration by scattered light

» Scattering angle 25°/ 90°

» wavelength 650nm +/- 30nm

» Calibration with formazine in EBC

S. 48

Turbidity in beer, recommended earlier by EBC

» Measurement of turbidity/ particle concentration by scattered light

» Scattering angle 90°

» wavelength 560nm green light» Calibration with formazine in

EBC

S. 49

» Same angle, same wavelength, same type:Excellent comparability, deviation < +/- 5%

» Same angle, same wavelength, different type:Good comparability, deviation < +/- 10 .. 20%

» Same angle, different wavelength:Hardly comparable, deviation by a factor of 2 (e.g. for green light) or more (white light)

» Different angle, different or same wavelength:Hardly comparable, deviation by a factor of 10 or more

Comparability data for online & lab equipment

More Application Examples

Spirits IndustrySoft drink Industry

Sugar IndustryFood Industry

Applications in distilleries (Whisky)

S. 52

Application points (Whisky)

» Turbidity after final filter/filter control

» Turbidity in laboratory

S. 53

Applications in distilleries (WHISKY)

Control and monitoring of:

» The filtration process

» product quality inline and in the laboratory

» Typical acceptable turbidity values are somewhere in the range of 0.5 .. 1 NTU

» Benefit

» ensure high clarity

» effective filtration

» storage possible at low temperatures

S. 54

Semi – automatic LabScat

» modified LabScat with a special measuring cuvette, a temperature display and a PC-Software for the control of the system and recording of the data

» Additionally, an external cooling thermostat with circulation is required

» A commercial PC / Notebook is needed to run the software and control the complete system

» Any existing LabScat can be modified and upgraded to be used for temperature-controlled turbidity measurement

» The modified LabScat can still be used like a “normal” standard instrument

S. 55

Semi – automatic LabScat - Details 1

Measuring cuvette with adapter

Baffle with integrated temperatureSensor (park position)

Baffle with integratedtemperatureSensor (measuring position)

S. 56

Semi – automatic LabScat - Details 2

Back side of the modified LabScatCabling and Temperature display box

S. 57

Mineral water industry

Monitoring of raw water from springs and wells

Visual clarity is an important criterion for:

» Purity

» Bacteriological safety

» Consumer acceptance

S. 58

Cleaning of iron and manganese impurities by aeration:

» Turbidity and / or DOC of raw water

» Turbidity and / or DOC after filtration

Mineral water industry

Thank you for your attention

Questions ?