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Particle and Fluoride Pre-Filter for B9 Plastics

Particle and Fluoride Pre-Filter for B9 Plastics. Dan Charles – Chemical Engineer John Markidis – Mechanical Engineering Israel Powell – Chemical Engineering An Vu – Chemical Engineering.

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Particle and Fluoride Pre-Filter for B9 Plastics

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  1. Particle and Fluoride Pre-Filter for B9 Plastics Dan Charles – Chemical Engineer John Markidis – Mechanical Engineering Israel Powell – Chemical Engineering An Vu – Chemical Engineering

  2. The main goal of this project is to develop a pre-filtration system to reduce turbidity and fluoride levels of water - before it enters the BWM. Objective

  3. Customer Needs

  4. Specifications

  5. Functional Decomposition

  6. System Architecture

  7. System

  8. Model

  9. Prototype

  10. Cost Analysis

  11. Testing Data

  12. Turbidity

  13. Total Suspended Solids

  14. Total Suspended Solids

  15. Fluoride Adsorption

  16. Results

  17. Particle Removal

  18. Particle Removal • Reduction of turbidity was much greater than that of total suspended solids, due to the fact that larger particles have a much greater effect on turbidity than smaller particles. • For our objective, turbidity is a more relevant specification. Turbidity is a measure of light scattering, therefore the higher turbidity the greater amount of UV light that would be blocked. • The goal for turbidity was achieved and surpassed during testing.

  19. Fluoride Adsorption • The adsorption of fluoride ions onto bone char has been widely studied • Conclusions have been made both for and against using bone char to remove fluoride from water • Our results were erratic but did consistently show fluoride was removed from the water

  20. Bone Char Based Bucket Defluoridator in Tanzanian Households • 2 Months of Operation • 32.5 L/day were treated • Average pH 8.56 • Sorption 1.1 (mg F-)/(g Bone Char) • $10 per unit

  21. Bone Char Based Bucket Defluoridator in Tanzanian Households

  22. Improvements

  23. Improvements • Straight-walled bucket • Companies had minimum order restrictions • Not sold locally • Better support for handles • Extruded shells on rings to hold base of handles • Original handle base supports built into CAD files Vs.

  24. Improvements • In extreme cases of turbidity, pre-filtering with a t-shirt is recommended • Improve device function: Large amount of suction created makes filter difficult to pull out from bucket • Provide lid for handle support and keeping filter level

  25. MSD II Obstacles • Were not able to buy the mesh from China • Mesh we purchased took up roughly 1/3 of our budget • Gaskets were hand cut • >5micron particle test • When drying the filter paper, weighed less than initial weight • Fluoride test strips required acidifying the sample to a 0.5 pH using concentrated hydrochloric acid

  26. Thank You

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