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UV Disinfection Evaluation - Technology Options
for Wastewater Treatment
Raymond Ehrhard, P.E.
Overview
Chlorination has been the preferred disinfection method used for treating WWTP
effluent, but concerns about worker and public safety and the potential for
chlorinated effluent to be toxic to aquatic life have called its use into
question. Although chlorine, sometimes followed by dechlorination, continues to
be used at most municipal WWTPs, use of other means, such as UV disinfection, is
increasing. UV is a technology capable of providing effective WWTP effluent
disinfection while reducing safety and environmental toxicity issues. A host of
issues must be carefully considered to verify that UV facilities are safe,
reliable and economical. These issues include the cost of power and lamp
replacement, lamp fouling, ability of the water to allow transmission of UV
radiation, tailing, photoreactivation and regrowth of disinfected
microorganisms, and dose selection.
This
course is suited for wastewater treatment engineers and professionals seeking to
gain an understanding of UV disinfection technologies. A complete description
of UV science is described along with its application to the disinfection of
wastewater. The three major UV technology options are fully presented and
compared. Results of a pilot demonstration are looked at to give the student a
real world example for evaluating UV technologies as an option for disinfecting
wastewater at an existing plant.
This
course is also an excellent overview for those professionals working in the
field of wastewater treatment.
The student is expected to read and review the material contained in the report
titled; Evaluation of Ultraviolet (UV) Radiation Disinfection Technologies
for Wastewater Treatment Plant Effluent, NYSERDA Report No. 04-07, 2004.
The student must take a
multiple-choice quiz consisting of forty (40) questions at the end of this course to earn PDH credits.
Specific Knowledge or Skill Attained
This course teaches the following specific knowledge and
skills:
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General Requirements of the USEPA Clean Water Act
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UV
Science
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Current UV Disinfection Technologies Used in Wastewater Treatment
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Variations of Alternative Lamps and UV Equipment
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Design and Dose Requirements of UV Systems
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O&M Requirements and Costs of UV Systems
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Support Information for
Determining UV Disinfection Options
Course
Click on the following PDF attachment
and review the source document prior to taking a quiz for credit.
UV Disinfection Evaluation (2.9 MB)
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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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