Presentation is loading. Please wait.

Presentation is loading. Please wait.


Similar presentations

Presentation on theme: "SIGRIST APPLICATIONS IN THE BEVERAGE INDUSTRY"— Presentation transcript:

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 S. 2

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 S. 4

5 Turbidity measurement - particularities
Scattered light intensity depends on: Concentration Particle size Particle shape Scattering angle Wavelength L1 L2 LS St ST S. 5

6 A B Turbidity measurement principle
Light propagation in a homogeneous medium (A) In the presence of a particle (B) S. 6

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 S. 7

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 S. 9

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 S. 11

12 Construction Stainless steel Sealless Design Sapphire Windows
Hastelloy C-22 S. 12

13 Construction Varivent® Housing Sensor Head Quick Release Button
Electronic Section S. 13

14 Optics - Absorption Optional colour measurement
430 nm, interference filter complying to EBC/MEBAK Max. 50 colour-EBC S. 14

15 Construction Secondary reference standard for calibration check S. 15

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 S. 16

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 S. 17

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 S. 18

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 + + S. 19

20 Color Measurement Measuring principle

21 Color Measurement Principle
-) Photo- multiplier Data Handling & Control System Light Source Filter S. 21

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 S. 22

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 S. 23

24 Application in the Brewing industry

25 Brew-house applications
Turbidity after lauter tun S. 25

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 S. 27

28 Yeast dosing Yeast dosing : Benefits: Optimization of the fermentation
shorter fermentation time save up to one day S. 28

29 Phase separation yeast / beer after fermentation tank
Benefits: Reduction of beer and yeast losses Improved filtration process S. 29

30 Phase separation yeast / beer

31 Turbidity prefiltration / yeast sediment detection
Benefits: Improved filtration process Reduction of Kieselguhr consumption S. 31

32 Turbidity measurement in filtration
Turbidity after Filtration S. 32

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 S. 33

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. 34

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. 35

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. 36

37 Phase separation beer / water / CIP
Benefits: Reduction of beer losses Reduced amount of waste water Save of water in general CIP checking S. 37

38 Quality Control in the laboratory
S. 38

39 Turbidity measurement in the laboratory
Measurement of beer clarity Accelerated aging Spot checks of brewing process S. 39

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. 40

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. 41

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. 42

43 LabScat: Calibration Factory Formazine calibration
Secondary glass standard for easy adjustment 10 linearization curves for different bottle types S. 43

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! S. 45

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. 46

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. 47

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. 48

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 S. 49

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 S. 52

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 S. 53

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. 54

55 Semi – automatic LabScat - Details 1
Baffle with integrated temperature Sensor (park position) Baffle with integrated temperature Sensor (measuring position) Measuring cuvette with adapter S. 55

56 Semi – automatic LabScat - Details 2
Back side of the modified LabScat Cabling and Temperature display box S. 56

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. 57

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 S. 58

59 Thank you for your attention
Questions ?


Similar presentations

Ads by Google