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

2. SIGRIST in the beverage industry
Parameters to be controlled:
Measurement of turbidity
Measurement of colour
Phase separation / CIP
Applications:
Breweries, Wineries, Distilleries
Mineral Water, Soft Drink Industry
Dairy Industry
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3. Turbidity Measurement
Measuring principle & particularities

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
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5. Turbidity measurement - particularities
Scattered light intensity depends on:
Concentration
Particle size
Particle shape
Scattering angle
Wavelength L1 L2 LS St ST
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6. A B Turbidity measurement principle
Light propagation in a homogeneous medium (A)
In the presence of a particle (B)
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7. Dual angle measurement
90°
I(90)
25°
I(25) 10 1 2 3 4 5
Dual angle scattered light measurement to characterize particle size distribution
Introduced by Sigrist in 1988
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8. Angular distribution of scattered light for different materials

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
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10. Sigrist new generation of online turbidity monitoring
TurBiScat and SICON
Sigrist new generation of online turbidity monitoring

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
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12. Construction Stainless steel Sealless Design Sapphire Windows
Hastelloy C-22
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13. Construction Varivent® Housing Sensor Head Quick Release Button
Electronic Section
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14. Optics - Absorption Optional colour measurement
430 nm, interference filter complying to EBC/MEBAK
Max. 50 colour-EBC
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15. Construction
Secondary reference standard for calibration check
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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: EBC / NTU
Measuring range colour: EBC
Sample temperature: °C, 180°C with cooling option
Cleaning: CIP/SIP compatible up to 120°C
Pressure: 10 bar / 100°C
Ambient temperature: °C
Ambient humidity: % R.H.
Protection degree: IP 66
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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: °C
Ambient humidity: % 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
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18. 10 Main Features Maintenance-free design without seals
Removable electronic section with quick lock
Extended sensor check function with fouling control
Dual-angle measurement with colour compensation
Optional colour measurement
Easy calibration check with secondary standard
Control unit with colour touch screen display
Variable display of measuring data, graphs, process performance
Smooth system integration using various communication interfaces
Data logging on SD-card
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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 + +
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20. Color Measurement
Measuring principle

21. Color Measurement Principle-)
Photo-
multiplier
Data Handling &
Control System
Light
Source
Filter
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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
1 cm
430 nm
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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
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24. Application in the Brewing industry

25. Brew-house applications
Turbidity after lauter tun
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26. Turbidity after whirlpool / separator

27. 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
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28. Yeast dosing Yeast dosing : Benefits: Optimization of the fermentation
shorter fermentation time
save up to one day
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29. Phase separation yeast / beer after fermentation tank
Benefits:
Reduction of beer and yeast losses
Improved filtration process
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30. Phase separation yeast / beer

31. Turbidity prefiltration / yeast sediment detection
Benefits:
Improved filtration process
Reduction of Kieselguhr consumption
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32. Turbidity measurement in filtration
Turbidity after Filtration
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33. Dual angle measurement in beer filtration
90°-value: 0,2 EBC EBC
25°-value: 0,05 EBC ... 0,2 EBC
25°-value smaller or equal to 90°-value: satisfying operation of filter
remaining turbidity by proteins, glucanes, etc.
25°-value higher than 90°-value:
significant amounts of yeast and/or Kieselguhr in beer
filter breakthrough; unsatisfying operation
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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
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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
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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!
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37. Phase separation beer / water / CIP
Benefits:
Reduction of beer losses
Reduced amount of waste water
Save of water in general
CIP checking
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38. Quality Control in the laboratory
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39. Turbidity measurement in the laboratory
Measurement of beer clarity
Accelerated aging
Spot checks of brewing process
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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)
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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
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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
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43. LabScat: Calibration Factory Formazine calibration
Secondary glass standard for easy adjustment
10 linearization curves for different bottle types
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44. Difference in the Turbidity Readings between Online and Lab Equipment Why?

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 ( nm)
Color: Lab units with white light offer no colour compensation!
Temperature: Even smallest temperature deviations can lead to major differences!
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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
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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
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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
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49. Comparability data for online & lab equipment
Same angle, same wavelength, same type: Excellent comparability, deviation < +/- 5%
Same angle, same wavelength, different type: Good comparability, deviation < +/ %
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
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50. More Application Examples
Spirits Industry
Soft drink Industry
Sugar Industry
Food Industry

51. Applications in distilleries (Whisky)

52. Application points (Whisky)
Turbidity after final filter/filter control
Turbidity in laboratory
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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 NTU
Benefit
ensure high clarity
effective filtration
storage possible at low temperatures
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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
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55. Semi – automatic LabScat - Details 1
Baffle with integrated
temperature
Sensor (park position)
Baffle with integrated
temperature
Sensor (measuring
position)
Measuring cuvette
with adapter
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56. Semi – automatic LabScat - Details 2
Back side of the modified LabScat
Cabling and Temperature display box
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57. Mineral water industry
Monitoring of raw water from springs and wells
Visual clarity is an important criterion for:
Purity
Bacteriological safety
Consumer acceptance
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58. Mineral water industry
Cleaning of iron and manganese impurities by aeration:
Turbidity and / or DOC of raw water
Turbidity and / or DOC after filtration
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59. Thank you for your attention
Questions ?