External nitrification in biological nutrient removal activated sludge systems

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dc.contributor.advisorEkama, George Aen_ZA
dc.contributor.advisorWentzel, Mark Cen_ZA
dc.contributor.authorMoodley, Rajanen_ZA
dc.date.accessioned2014-12-10T08:13:10Z
dc.date.available2014-12-10T08:13:10Z
dc.date.issued1999en_ZA
dc.descriptionIncludes bibliography.en_ZA
dc.description.abstractIn conventional nitrification-denitrification biological excess phosphorous removal (NDBEPR) activated sludge systems, such as the UCT system for example, both nitrification and phosphorous uptake (P uptake) occur simultaneously in the, usually large, aerobic reactor. In the UCT system the nitrate load to the anoxic reactor is limited by the a-recycle (i.e. system constraint recycle from the aerobic to the anoxic reactor) and the internal aerobic nitrification performance. The latter process, is mediated by the nitrifiers having a slow growth rate of 0.45/d, governs the sludge age of the biological nutrient removal activated sludge (BNRAS) system and thus results in long (20 - 25 day) sludge ages and large aerobic mass fraction requirements to nitrify completely. However, if stable nitrification could be achieved outside the BNRAS external nitrification (EN) system then nitrification and the suspended solids sludge age become uncoupled allowing greater flexibility into the BNRAS system.en_ZA
dc.identifier.apacitationMoodley, R. (1999). <i>External nitrification in biological nutrient removal activated sludge systems</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/9945en_ZA
dc.identifier.chicagocitationMoodley, Rajan. <i>"External nitrification in biological nutrient removal activated sludge systems."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1999. http://hdl.handle.net/11427/9945en_ZA
dc.identifier.citationMoodley, R. 1999. External nitrification in biological nutrient removal activated sludge systems. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Moodley, Rajan AB - In conventional nitrification-denitrification biological excess phosphorous removal (NDBEPR) activated sludge systems, such as the UCT system for example, both nitrification and phosphorous uptake (P uptake) occur simultaneously in the, usually large, aerobic reactor. In the UCT system the nitrate load to the anoxic reactor is limited by the a-recycle (i.e. system constraint recycle from the aerobic to the anoxic reactor) and the internal aerobic nitrification performance. The latter process, is mediated by the nitrifiers having a slow growth rate of 0.45/d, governs the sludge age of the biological nutrient removal activated sludge (BNRAS) system and thus results in long (20 - 25 day) sludge ages and large aerobic mass fraction requirements to nitrify completely. However, if stable nitrification could be achieved outside the BNRAS external nitrification (EN) system then nitrification and the suspended solids sludge age become uncoupled allowing greater flexibility into the BNRAS system. DA - 1999 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1999 T1 - External nitrification in biological nutrient removal activated sludge systems TI - External nitrification in biological nutrient removal activated sludge systems UR - http://hdl.handle.net/11427/9945 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9945
dc.identifier.vancouvercitationMoodley R. External nitrification in biological nutrient removal activated sludge systems. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1999 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9945en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherEngineeringen_ZA
dc.titleExternal nitrification in 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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