Design of Water Filter for Third World Countries

Louis Chan
Marcus Chan
Jingwen Wang
A thesis submitted in partial fulfillment
of the requirements for the degree of
Date: March 26th, 2009
Supervisors: W. Cleghorn / J. Mills
Department of Mechanical and Industrial Engineering

The residents in third world countries battle against waterborne diseases every day. It is a luxury
to have access to safe drinking water. However, it is extremely difficult to invest on a water filter
with minimal annual income. A low cost water filter can serve as a subsidy such that every
family can take advantage of this luxury. In this thesis, literature reviews on existing water
filters have been completed and design of a dual level water filter with ceramic and activated
carbon is developed. Water flow rate tests are carried out to optimize water filter design.
Further, the filter effectiveness in diminishing various contaminates is analyzed by a licensed
sampling laboratory. A manufacturing line to produce the dual water filters is proposed and the
cost of manufacturing a unit is calculated to be $1.53 USD, which is an affordable price for
people in third world countries. With a low cost water filter available, residents in the third
world countries could enjoy having safe drinking water and improve quality of life.

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