The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems

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dc.contributor.advisorEkama, George Aen_ZA
dc.contributor.advisorMarais, Gerrit van Rooyenen_ZA
dc.contributor.authorDe Villiers, M Een_ZA
dc.date.accessioned2015-12-28T05:59:33Z
dc.date.available2015-12-28T05:59:33Z
dc.date.issued1994en_ZA
dc.descriptionIncludes bibliography.en_ZA
dc.description.abstractFilamentous bulking and its associated poor sludge settleability is a considerable problem in South African activated sludge plants, as indicated by the two surveys undertaken on these plants in 1985 and 1988 (Blackbeard et al., 1986, 1988). Amelioration of this problem would enable a greater daily flow and load of wastewater to be treated by these plants. From the surveys it is apparent that bulking in long sludge age activated sludge plants is mainly due to the proliferation of the group of so-called low F/M filaments (as classified by Jenkins et al., 1984). In the course of a 4-year research program investigating specific bulking control methods, Gabb et al. (1989) concluded that the selector effect, which was proposed as a method for controlling low F/M filament bulking, was ineffective. This research also indicated that in fully aerobic systems low F/M bulking was ameliorated, but in intermittently aerated anoxic-aerobic systems low F/M filament bulking was promoted. The research presented in this thesis forms part of a follow-up bulking research program into low F/M bulking which led to the formulation of a bulking hypothesis by Casey et al. (1992b) and focuses on the effect of different anoxic-aerobic conditions and their effect on the concentration of nitrate and nitrite entering the aerobic zone/reactor in single intermittently aerated and multi-reactor nitrification-denitrification systems.en_ZA
dc.identifier.apacitationDe Villiers, M. E. (1994). <i>The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen 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/11427/15945en_ZA
dc.identifier.chicagocitationDe Villiers, M E. <i>"The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1994. http://hdl.handle.net/11427/15945en_ZA
dc.identifier.citationDe Villiers, M. 1994. The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - De Villiers, M E AB - Filamentous bulking and its associated poor sludge settleability is a considerable problem in South African activated sludge plants, as indicated by the two surveys undertaken on these plants in 1985 and 1988 (Blackbeard et al., 1986, 1988). Amelioration of this problem would enable a greater daily flow and load of wastewater to be treated by these plants. From the surveys it is apparent that bulking in long sludge age activated sludge plants is mainly due to the proliferation of the group of so-called low F/M filaments (as classified by Jenkins et al., 1984). In the course of a 4-year research program investigating specific bulking control methods, Gabb et al. (1989) concluded that the selector effect, which was proposed as a method for controlling low F/M filament bulking, was ineffective. This research also indicated that in fully aerobic systems low F/M bulking was ameliorated, but in intermittently aerated anoxic-aerobic systems low F/M filament bulking was promoted. The research presented in this thesis forms part of a follow-up bulking research program into low F/M bulking which led to the formulation of a bulking hypothesis by Casey et al. (1992b) and focuses on the effect of different anoxic-aerobic conditions and their effect on the concentration of nitrate and nitrite entering the aerobic zone/reactor in single intermittently aerated and multi-reactor nitrification-denitrification systems. DA - 1994 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1994 T1 - The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems TI - The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems UR - http://hdl.handle.net/11427/15945 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15945
dc.identifier.vancouvercitationDe Villiers ME. The effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen removal activated sludge systems. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1994 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/15945en_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.subject.otherApplied Scienceen_ZA
dc.titleThe effect of nitrite and nitrate concentrations on low F/M filament bulking in nitrogen 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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