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Potable Water - Filtration
Edward Brunet, Jr., P.E.
Overview
For
as long as humans have walked the earth, they have quested for pure drinking
water. Sanskrit writings dating back to 2000 B.C. describe how to purify
water by boiling it over a fire or filtering it through sand and gravel.
The first municipal water plant was installed in Scotland in 1804. Slow
sand filtration was first used for municipal water plants in the U.S. in 1872.
There have been many improvements made in filter technology since the early days
of water treatment. Diatomaceous earth filters were used during WWII to
provide lightweight, easily transportable potable water treatment units to serve
soldiers in the field. As drinking water standards increase in stringency,
membrane filters have become more attractive in recent years.
In
this course the student will review the technical briefs Filtration, Slow
Sand Filtration,and Diatomaceous Earth Filtration for Drinking Water published by the National Drinking Water Clearinghouse.
These technical briefs provide an overview of the different types of filtration
available for treating potable water. This course is particularly
relevant to engineers involved in the design and selection of water treating
and/or distribution systems, as well as engineers who are simply interested in
learning more about potable water filtration systems.
The student must take a
multiple-choice quiz consisting of fifteen questions at the end of
this course to obtain PDH credits.
Specific Knowledge or Skill Attained
This course teaches the following specific knowledge and
skills:
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Why surface water
and groundwater under the influence of surface water must be filtered.
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Pre-filtration
processes, including coagulation, flocculation, and sedimentation.
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The process
description, advantages and limitations of slow sand filtration
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Diatomaceous earth
filtration history, performance capabilities and types - pressure filters vs.
vacuum filters
Course
Click on the following PDF attachment and
review technical briefs Filtration, Slow Sand Filtration,and
Diatomaceous Earth Filtration for Drinking Water
published by the National Drinking Water Clearinghouse prior to taking a quiz
for credit.
"Filtration"
(904 KB)
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To obtain PDH credits for this course, you will need to take a quiz for
credit. Click on the link below.
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