An Introduction to Our Water Filtration Systems. Where Do We Work? 4,078 Students The Dominican Republic Haiti 9 Schools 8,803 Students 10 Schools.

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Presentation transcript:

An Introduction to Our Water Filtration Systems

Where Do We Work? 4,078 Students The Dominican Republic Haiti 9 Schools 8,803 Students 10 Schools

Why Filter the Water? Dominican Republic Water Only 26.5% positive for residual disinfectant National House Survey in % positive for fecal bacteria 52% of rural population still lack access to improved water sources Haiti Water The World Bank

What Do We Do? WWR Schools Normal Schools

Water Filtration System: Sediment Filter 1 Carbon Filter 2 Ultraviolet Light 3

How it works? – Sediment Filter 5 micron wound poly sediment filter

What gets filtered? – Sediment Filter Used Suspended solid greater than 5 microns Dirt and debris 1 Protozoa: -Giardia cysts (8-14um) -Cryptosporidium oocytes (4-6um) 2 Helminthes: -Hookworm eggs (50-100um) -Roundworm eggs (40-60um) 3 Filters miss bacteria such as Cholera, E. coli, and Salmonella (0.2 – 0.5 microns) and viruses such as Hepatitis A, rotovirus and Norovirus (0.004 microns) New

How it works? – Carbon Filter 10 micron carbon block filter

What gets filtered? – Carbon Filter Absorption of pollutant to for better tasting water and removes harmful water contaminants Contaminants: -Industrial chemical pollutants, solvents, pharmaceuticals, pesticides and herbicides 1 Aesthetics: -Taste -Odor 2 Cannot remove minerals, salts and dissolved inorganic compounds (arsenic, barium, cadmium, lead, mercury, selenium, and thallium)

How it works? – Ultraviolet Light 10 micron carbon block filter

What gets disinfected? – Ultraviolet Light Energy produced by UV lamp has ability to destroy 99.99% of drinking water pathogens Bacteria 1 Viruses 2 Proper storage of filtered and disinfected water is important to prevent contamination Fungi 3 Algae 4 Protozoa 5 Safe to Drink!

Installation A water source (well/river/spring) 1

Installation Electricity and piping 2

Installation Security and local support 3

Installation Storage and distribution 4

Installation Regular maintenance 5

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