The effect of temperature and overwater dissolved oxygen concentration on benthal feedback from pulp and paper mill sludges

Persistent Link:
http://hdl.handle.net/10150/191913
Title:
The effect of temperature and overwater dissolved oxygen concentration on benthal feedback from pulp and paper mill sludges
Author:
Kovara, Michael Anthony,1949-
Issue Date:
1986
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:
Settleable solids accumulate (benthal layer) in stabilization lagoons, reducing volume for treatment and providing a source of oxygen demand and nutrients (feedback). The objective of this research was to define the impact of overwater dissolved oxygen (DO) and temperature upon these benthal properties. Batch benthal deposits (2:1, vol/vol, primary clarifier underflow and waste activated sludge) under a continuous-flow overwater layer were subject to variable temperature and DO. Experiment conditions simulated a facultative lagoon. Over 124 days, DO uptake was measured and effluent was sampled for chemical oxygen demand (COD), ammonia-N, and ortho-phosphate. Nearly all phosphorus feedback occurred in the first 31 days, and ammonia-N feedback was most constant for the duration. COD feedback was greatly reduced and DO uptake increased slightly with increasing DO. All feedbacks increased more from 15°C to 20°C than from 20°C to 26°C. Residual sludge analyses indicated that phosphorus was limiting to benthal stabilization. Temperature dependent reactions caused a linear decrease in total and volatile suspended solids.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Sludge bulking.; Wood-pulp industry -- Environmental aspects.; Paper mills -- Environmental aspects.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Civil Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bryant, C. W.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe effect of temperature and overwater dissolved oxygen concentration on benthal feedback from pulp and paper mill sludgesen_US
dc.creatorKovara, Michael Anthony,1949-en_US
dc.contributor.authorKovara, Michael Anthony,1949-en_US
dc.date.issued1986en_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.abstractSettleable solids accumulate (benthal layer) in stabilization lagoons, reducing volume for treatment and providing a source of oxygen demand and nutrients (feedback). The objective of this research was to define the impact of overwater dissolved oxygen (DO) and temperature upon these benthal properties. Batch benthal deposits (2:1, vol/vol, primary clarifier underflow and waste activated sludge) under a continuous-flow overwater layer were subject to variable temperature and DO. Experiment conditions simulated a facultative lagoon. Over 124 days, DO uptake was measured and effluent was sampled for chemical oxygen demand (COD), ammonia-N, and ortho-phosphate. Nearly all phosphorus feedback occurred in the first 31 days, and ammonia-N feedback was most constant for the duration. COD feedback was greatly reduced and DO uptake increased slightly with increasing DO. All feedbacks increased more from 15°C to 20°C than from 20°C to 26°C. Residual sludge analyses indicated that phosphorus was limiting to benthal stabilization. Temperature dependent reactions caused a linear decrease in total and volatile suspended solids.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshSludge bulking.en_US
dc.subject.lcshWood-pulp industry -- Environmental aspects.en_US
dc.subject.lcshPaper mills -- Environmental aspects.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.chairBryant, C. W.en_US
dc.identifier.oclc213416559en_US
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