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Supervised by:Dr. Ruwan Gallage

Dr. SrimalMr. T. Ranjan

DOMESTIC WATER PURIFIER

Group No 17

Wickramarathne G.T (EG/2012/2111)Thiviyanesan K. (EG/2012/2098)Thajivan S. (EG/2012/2090)

Progress Section-02

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Our Client…

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Fly Back to 1st Progress Section:

Water purification technologies

Proposed design

Next step

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Conceptual Design

Modifications• Heavy metal filter at last• More user friendly

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Ready for Testing..

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Fabrication

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Selecting Parameters

Chemical equations

Thermodynamic diagrams

Experimental results

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Source: Industrial waste water treatment book- Frank Woodard

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Selecting Electrodes

Ref: Bazrafshanet al. Journal of Environmental Health Science & Engineering (2015)

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Concentration Vs. Time

Removal of T race H eavy Metals from Drinking Water by ElectrocoagulationJoe Heffron-Marquette University

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Ceramic filter

Electrocoagulation treatment

Charcoal filter

UV treatment Post filter

Secrete of 5 Stage Filtering..

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CAD Design

Ceremic filter

Charcoal filter

Electrocoagulation chamber

Post filter

UV filterStorage tank

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Fabricated Model for Testing

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Ceramic Filter

Purify water from sand, mud and other suspended matters- sediments

Inexpensive and commonly available in market

Easy to use

Efficiency depends on the height water (container)

Automatically continuous feeding system of water to

The container with the aid of a mechanical floating valve

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Charcoal filterCan be purchased at low price

Removing chlorine, sediment, hexavalent volatile organic compound, order and taste

Efficiency of filter is based on flow rate

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Why electrocoagulation

No chemicals.Less sludge.Low initial cost.Easy maintenance.Less voltage requirement can be supplied.High effectiveness

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Electrocoagulation Reactor

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Not only a purifier…

Purifier• Decontamination• Remove smell and flavours• Remove of metal ions

including As, Cd, Pb, Ni, Cu and etc.

• Dechlorination• Remove colloidal particles

Water quality improver

• Water soften• Oxygen saturation• Reduce ORP ( Oxidation

Reduction Potential)• pH balanced• Reduce surface tension

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Factors affected for electrocoagulation

Wherem -mass liberated from the anode I -current (A) t -reaction time(s)M -molar mass (g/mol), =for Al, M=26.98 g/mol; Z -valence number=for Al, Z=3F -Faraday’s constant (C/mol)=(96,486 C/mol).

𝑚=𝐼 .𝑡 .𝑀𝑧 .𝐹

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Reactor for electrocoagulation

Control circuit

Solenoid

Inlet

outlet

electrodes

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UV- purifier

Uv filter

Uv bulb

Stainless steel

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THANK YOU…