Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems

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dc.contributor.advisorEkama, George Aen_ZA
dc.contributor.advisorWentzel, Mark Cen_ZA
dc.contributor.authorMebrahtu, Michael Kidaneen_ZA
dc.date.accessioned2014-07-31T10:26:42Z
dc.date.available2014-07-31T10:26:42Z
dc.date.issued2007en_ZA
dc.descriptionIncludes bibliographical references.
dc.description.abstractWaste activated sludge (WAS) is a biological sludge that contains biodegradable and non-biodegradable volatile suspended solids (VSS) and non-volatile inorgainic suspended solids (ISS). Stabilization for safe disposal of the WAS is a process of paramount importance at wastewater treatment plants (WWTPs). Hence, aerobic digestion of the WAS from biological nutrient removal (BNR) activated sludge (AS) systems was carried out under batch conditions to (1) measure changes in nitrogen and phosphorus concentrations in solid and liquid phases during aerobic batch digestion tests (2) simulate the parent system with Activated Sludge Model No. 2 (ASM-2) in AQUASIM computer program to obtain the initial conditions for batch test simulation (3) simulate the batch aerobic digestion process with ASM-2 and compare with experimental data (4) develop VSS-based and total suspended solids (TSS) (with the addition of ISS to the VSS-based) batch reactor and steady state models for aerobic digestion of nitrification denitrification biological excess phosphorus removel (NDBEPR) WAS based on the individual biomass die-off rates of phosphorus accumulating organisms (PAOs) and ordinary heterotrophic organisms (OHOs), and (5) evaluate the ASM-2 simulation results with steady state aerobic batch digestion model.en_ZA
dc.identifier.apacitationMebrahtu, M. K. (2007). <i>Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering. Retrieved from http://hdl.handle.net/11427/5025en_ZA
dc.identifier.chicagocitationMebrahtu, Michael Kidane. <i>"Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 2007. http://hdl.handle.net/11427/5025en_ZA
dc.identifier.citationMebrahtu, M. 2007. Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mebrahtu, Michael Kidane AB - Waste activated sludge (WAS) is a biological sludge that contains biodegradable and non-biodegradable volatile suspended solids (VSS) and non-volatile inorgainic suspended solids (ISS). Stabilization for safe disposal of the WAS is a process of paramount importance at wastewater treatment plants (WWTPs). Hence, aerobic digestion of the WAS from biological nutrient removal (BNR) activated sludge (AS) systems was carried out under batch conditions to (1) measure changes in nitrogen and phosphorus concentrations in solid and liquid phases during aerobic batch digestion tests (2) simulate the parent system with Activated Sludge Model No. 2 (ASM-2) in AQUASIM computer program to obtain the initial conditions for batch test simulation (3) simulate the batch aerobic digestion process with ASM-2 and compare with experimental data (4) develop VSS-based and total suspended solids (TSS) (with the addition of ISS to the VSS-based) batch reactor and steady state models for aerobic digestion of nitrification denitrification biological excess phosphorus removel (NDBEPR) WAS based on the individual biomass die-off rates of phosphorus accumulating organisms (PAOs) and ordinary heterotrophic organisms (OHOs), and (5) evaluate the ASM-2 simulation results with steady state aerobic batch digestion model. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems TI - Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems UR - http://hdl.handle.net/11427/5025 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/5025
dc.identifier.vancouvercitationMebrahtu MK. Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5025en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Civil Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCivil Engineeringen_ZA
dc.titleAerobic digestion of waste activated sludge from biological nutrient removal activated sludge systemsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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