Ultraviolet and ultrasound disinfection of a recycle irrigation water

Persistent Link:
http://hdl.handle.net/10150/191938
Title:
Ultraviolet and ultrasound disinfection of a recycle irrigation water
Author:
Hardcastle, Clavin Hunter,1959-
Issue Date:
1987
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Disinfection of an irrigation recycle water is evaluated by an investigation divided into three phases. Phase I experiments investigates disinfection by ultraviolet light alone; Phase II examines ultrasound disinfection; and Phase III investigates combined effects of ultrasound and ultraviolet light. Phase III also evaluates unit process sequencing in order to optimize disinfection performance. Ultraviolet light produced an average microorganism inactivation of 85.4% following one minute of UV irradiation. The response became asymptotic at this point. Cell viability, measured by ATP concentration, was not reduced below 10% until 15 minutes of UV treatment. Ultrasonic treatment resulted in microorganism survivals ranging fram 66.4% (60 W/1 and 30 minutes of treatment) to 25.1% (350 W/1 and 30 minutes of treatment). Combined treatment processes produced comparable results to UV only disinfection schemes. Overall, a satisfactory level of disinfection was not attained using UV light or ultrasound. The lack of disinfection response was attributable to the presence of interfering water constituents.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Irrigation water -- Quality.; Biosphere -- Models.; Biotic communities.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Civil Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Sierka, Raymond A.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleUltraviolet and ultrasound disinfection of a recycle irrigation wateren_US
dc.creatorHardcastle, Clavin Hunter,1959-en_US
dc.contributor.authorHardcastle, Clavin Hunter,1959-en_US
dc.date.issued1987en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractDisinfection of an irrigation recycle water is evaluated by an investigation divided into three phases. Phase I experiments investigates disinfection by ultraviolet light alone; Phase II examines ultrasound disinfection; and Phase III investigates combined effects of ultrasound and ultraviolet light. Phase III also evaluates unit process sequencing in order to optimize disinfection performance. Ultraviolet light produced an average microorganism inactivation of 85.4% following one minute of UV irradiation. The response became asymptotic at this point. Cell viability, measured by ATP concentration, was not reduced below 10% until 15 minutes of UV treatment. Ultrasonic treatment resulted in microorganism survivals ranging fram 66.4% (60 W/1 and 30 minutes of treatment) to 25.1% (350 W/1 and 30 minutes of treatment). Combined treatment processes produced comparable results to UV only disinfection schemes. Overall, a satisfactory level of disinfection was not attained using UV light or ultrasound. The lack of disinfection response was attributable to the presence of interfering water constituents.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshIrrigation water -- Quality.en_US
dc.subject.lcshBiosphere -- Models.en_US
dc.subject.lcshBiotic communities.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSierka, Raymond A.en_US
dc.identifier.oclc213340051en_US
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