Page 62 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

Water Treatment 17

between process control and surveillance? What
BOX 1.4 (continued) GOLDEN AGE online instruments did you see? What about sampling?
OF ENVIRONMENTAL ENGINEERING Was sampling discussed? What kind of sampling? Was
laboratory analysis discussed?
but with not too much funding available in environmen-
The following problems, Problems 1.4 through 1.14,
tal engineering. Some topics remained without ‘‘clos-
are intended to illustrate a variety of treatment situations
ure’’ and the rate of advance to the field was slowed and
that may be encountered in practice.
dependent, to a large extent, on what could be gleaned
1.4 Treatment Trains
from projects that suited the agencies, particularly EPA.
Suggest treatment trains for a five star hotel located in
Although the ‘‘golden age’’ has passed, the profession
Cyprus for (a) drinking water, (b) wastewater.
has made the transition from purely empiricism to
1.5 Treatment Train
rational approaches. Some may argue that the pendulum
Describe a traditional treatment train for a municipality
has swung too far, i.e., that we may lack a sense of
that treats surface water.
serving professional practice as the primary guide in
1.6 Water Quality
engineering education and perhaps even in consulting
A small city relies on groundwater. Suggest some
engineering.
water-quality issues that could be present and unit pro-
cesses that could deal with the issues.
1.7 Treatment Train for Potable Water
1.6 SUMMARY Describe the treatment train that produces potable water
for your locale.
As indicated, water treatment covers a great deal of variety.
1.8 Treatment Train at WWTP Site Visit
With about 15 unit processes, the combination selected for a
Describe the treatment train for wastewater that you
treatment train depends on the technical requirements of the
visit in your locale.
treatment task, i.e., the contaminants to be treated and the
1.9 Potable Water Quality Goals and Treatment
objectives of the treatment.
Discuss the future water-quality issues and associated
For any unit process, a number of technologies exist or
treatment modifications for potable water for the plant
may be developed that utilize the principles of the process.
in your locale.
Some are generic and some are proprietary. The technologies
1.10 Water-Quality Goals and Wastewater Treatment
provide an array of choices that help to tailor a treatment train
Discuss the future water-quality issues and associ-
to the situation at hand.
ated treatment modifications for wastewater in your
The intent of the book is to describe theory and practice for
locale.
each of the unit processes. The specific technologies are
1.11 Technologies for Unit Processes
described only as useful to illustrate the processes. The tech-
Generate a list of technologies for each of the unit
nologies represent the variations of principles associated with
processes identified in your visits to treatment plants
a particular unit process.
(pick two for hand-in).
Nontechnical issues play a part in almost every technical
1.12 Ambient Water-Quality Processes
decision and are alluded to in order to indicate some of
In the ambient environment, list cases in which water-
the realities of process design. These factors are learned mostly
quality changes occur passively. Is knowledge of unit
in the context of experience and are mentioned in this book only
processes applicable to understanding natural systems?
to a limited extent so that there is an awareness of their role.
Discuss.
1.13 Passive versus Active Technologies
PROBLEMS Discuss passive technologies versus active (i.e.,
in which operation is essential to performance). List
1.1 Unit Processes examples.
Visit a treatment plant and describe your impressions 1.14 Groundwater Contaminants
about the plant and its unit processes. (The idea is to List 12 contaminants that might be found in a pump-
gain some familiarity with a plant and to experience the and-treat situation.
scale, appearance, functioning, etc. of unit processes. 1.15 Form-Fit Context
Later, you can compare the variation in technologies Select several kinds of treatment situation that could
between plants.) include any of a variety of possibilities for water-quality
1.2 Unit Processes and Models profiles and the uses of water. What kind of treatment
Based upon your recent visit to a WTP, list ‘‘fits’’ would you feel could be appropriate for each
the treatment processes that you observed. Did you hypothetical (or real case from any experiences or
see any physical models? What were the purposes? knowledge) that you generate.
1.3 Sampling and Instrumentation 1.16 Social Context
Regarding your visit to a water (or wastewater) treat- What different social and political contexts would you
ment plant in your vicinity, describe and distinguish expect to encounter in the above treatment situations?