Dynamics and control of temperature in the aerobic digestion of waste activated sludge

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dc.contributor.advisorAndrews, John F.
dc.contributor.committeeMemberBedient, Philip B.
dc.contributor.committeeMemberTomson, Mason B.
dc.creatorSparks, John P.
dc.date.accessioned2018-12-18T21:22:09Z
dc.date.available2018-12-18T21:22:09Z
dc.date.issued1984
dc.description.abstractPilot plant data and computer simulation show significant process benefits from the separation of aeration and mixing in open tank aerobic digestion. Open tank operation results in surface heat losses which cancel the heat gain of the exothermic organism decay reaction and drive digestion temperatures toward ambient atmospheric conditions. Diffused aeration produces a further evaporative heat loss through vapor enrichment of the diffused air. Mechanical mixers, however, elevate digestion temperatures through heat input from mixing and lower required air flow rates. Solids destruction rates are increased by higher digestion temperatures and increased oxygen transfer efficiency. For this reason, mechanical mixers should be included in the design of aerobic digesters and may relieve overload conditions at existing wastewater facilities. Also, the correlation between temperature history and solids destruction indicates that time-temperature data may be a valid indicator of sludge stability.
dc.format.digitalOriginreformatted digital
dc.format.extent129 pp
dc.identifier.callnoThesis Env. Sci. 1984 Sparks
dc.identifier.citationSparks, John P.. "Dynamics and control of temperature in the aerobic digestion of waste activated sludge." (1984) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104386">https://hdl.handle.net/1911/104386</a>.
dc.identifier.digitalRICE2021
dc.identifier.urihttps://hdl.handle.net/1911/104386
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.titleDynamics and control of temperature in the aerobic digestion of waste activated sludge
dc.typeThesis
dc.type.materialText
thesis.degree.departmentEnvironmental Science
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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