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.

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Particle and Fluoride Pre-Filter for B9 Plastics

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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


Objective

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

Customer Needs


Specifications

Specifications


Functional decomposition

Functional Decomposition


System architecture

System Architecture


System

System


Model

Model


Prototype

Prototype


Cost analysis

Cost Analysis


Testing data

Testing Data


Turbidity

Turbidity


Total suspended solids

Total Suspended Solids


Total suspended solids1

Total Suspended Solids


Fluoride adsorption

Fluoride Adsorption


Results

Results


Particle removal

Particle Removal


Particle removal1

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 adsorption1

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

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 households1

Bone Char Based Bucket Defluoridator in Tanzanian Households


Improvements

Improvements


Improvements1

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.


Improvements2

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


Particle and fluoride pre filter for b9 plastics

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

Thank You


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