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Susan Lu

Susan Lu

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May 2015

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Water Purification for Developing Countries

By Pegah Hassanzadeh

101%
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$2,000
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15
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Published on Jul 22, 2015

Chemical Process

On the left hand side is the crab powder in Sodium hydroxide solution. On the right hand side is the solution after it has been stirring for about two hours. The use of Sodium Hydroxide is to depro...

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Published on Jul 20, 2015

Sieving

The sieve helps separate the coarse from the fine particles of the crushed crab shells.

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Published on Jul 20, 2015

From crab shells to powder

The crab shells are placed inside a coffee blender to achieve a more powder like form of the shells. The shells have to be blended several times before reaching the powder like stage and it will fi...

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Published on Jul 20, 2015

Preparing the crab shells

After the crab shells are soaked and washed using deionized water they are placed underneath the fume hood to dry.

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