Mitigation of sewer crown corrosion via competitive inhibition of thiobacilli

Persistent Link:
http://hdl.handle.net/10150/278007
Title:
Mitigation of sewer crown corrosion via competitive inhibition of thiobacilli
Author:
Padival, Navnit Ajit, 1966-
Issue Date:
1991
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:
Inhibition of biogenic acid production by thiobacilli was investigated by encouraging the growth of potential competitors. Two-organism competition experiments (Thiobacillus sp. vs. heterotrophic competitor) were conducted in a bench-scale, continuous-flow reactor. Results were sensitive to the influent ammonia/glucose ratio. Under nitrogen-limiting conditions, the cell concentration of T. thiooxidans or T. neapolitanus and acid production rates were reduced by about two orders of magnitude. Under carbon-limiting conditions, only modest reductions in the thiobacilli cell density and effluent sulfate were observed. In general, encouragement of microbial competition can interrupt acid production by thiobacilli and may inhibit crown corrosion in concrete sewers.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Civil.; Engineering, Sanitary and Municipal.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Arnold, Robert G.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleMitigation of sewer crown corrosion via competitive inhibition of thiobacillien_US
dc.creatorPadival, Navnit Ajit, 1966-en_US
dc.contributor.authorPadival, Navnit Ajit, 1966-en_US
dc.date.issued1991en_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.abstractInhibition of biogenic acid production by thiobacilli was investigated by encouraging the growth of potential competitors. Two-organism competition experiments (Thiobacillus sp. vs. heterotrophic competitor) were conducted in a bench-scale, continuous-flow reactor. Results were sensitive to the influent ammonia/glucose ratio. Under nitrogen-limiting conditions, the cell concentration of T. thiooxidans or T. neapolitanus and acid production rates were reduced by about two orders of magnitude. Under carbon-limiting conditions, only modest reductions in the thiobacilli cell density and effluent sulfate were observed. In general, encouragement of microbial competition can interrupt acid production by thiobacilli and may inhibit crown corrosion in concrete sewers.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Civil.en_US
dc.subjectEngineering, Sanitary and Municipal.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorArnold, Robert G.en_US
dc.identifier.proquest1346425en_US
dc.identifier.bibrecord.b27226694en_US
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