1. On-line Turbidity Measurement Statistical Analysis ME 430 Senior Lab Team, Spring 2006 Instructor: Dan Cordon Team Members: Andrew Vogt, Brad Watson, Cristy Izatt, and Charlie Mencke

2. Overview Project Objective Project Background/Motivation Mechanical Components –Design –Analysis Theory Experimentation Conclusions Recommendations

3. Project Objective Understand basic system behavior Calibrate optical components using regression analysis –Determine Relationship between Voltage & Turbidity

4. Project Background/Motivation Desired Blue water Filtration System FeCl 3 Precipitating Component Influent Water BluePRO TM Filter Effluent Water Improved Turbidity Measurement Improved Turbidity Measurement On-Line Control System Current Blue Water Filtration System Turbidity Measurement Turbidity Measurement

5. Mechanical Component Design Flow Design Desired Outcomes: Easy installation and removal Aid in accurate optic operation Easy installation and removal Aid in accurate optic operation Influent Effluent Quick adaptation to influent/effluent lines Simple pipe/hose connections Valve (not shown) for calibration, maintenance, and Flow Chamber mount Low maintenance and predictable flow

6. Mechanical Component Design Optical Design Manufacture & install parts for statistical analysis Optical Analysis Theory Important Concepts: Optical Theory Statistical Analysis Linear Position Angular Position

7. Mechanical Component Analysis Optical Analysis Theory Optical Theory

8. Experimental Diagram Fluid Sample Turbidity Measurement Silicon- Photodiode Light Receiver Multimeter Voltage Measurement + Turbidity Control Independent X Dependent Y

9. Regression

10. Root Sum Square ε y =Error in Multimeter

11. Results Optic Angle = 23° Height=1in Optic Angle = 39° Height=1.25 Optic Angle=39º Height=1in 23°; 1inch 39°; 1inch39°; 1.25 inch

12. Conclusion Linear relationship between turbidity and voltage Re-calibration is necessary for change in position and flow rate Use of calibration equipment is critical for precision Maximum Error in Turbidity at 39°; 1 inch is +/-1.83 NTU

13. Recommendations Use of photo-diode with larger voltage output More accurate multimeter and handheld turbidimeter

14. Questions?