Particle and fluoride pre filter for b9 plastics
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Particle and Fluoride Pre-Filter for B9 Plastics PowerPoint PPT Presentation


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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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Particle and Fluoride Pre-Filter for B9 Plastics

Dan Charles – Chemical Engineer

John Markidis – Mechanical Engineering

Israel Powell – Chemical Engineering

An Vu – Chemical Engineering


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


Customer Needs


Specifications


Functional Decomposition


System Architecture


System


Model


Prototype


Cost Analysis


Testing Data


Turbidity


Total Suspended Solids


Total Suspended Solids


Fluoride Adsorption


Results


Particle Removal


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.


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


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


Bone Char Based Bucket Defluoridator in Tanzanian Households


Improvements


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.


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


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


Thank You


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