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|a eng
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|a Jobbágy, A
|e verfasserin
|4 aut
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|a Proliferation of glycogen accumulating organisms induced by Fe(III) dosing in a domestic wastewater treatment plant
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|c 2006
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|a Text
|b txt
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|a ohne Hilfsmittel zu benutzen
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|a Date Completed 05.12.2006
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|a Date Revised 17.09.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a To meet the effluent requirements given for the sensitive receiving body, the Southpest Wastewater Treatment Plant of Budapest, Hungary uses a combined activated sludge-biofilter system with chemical precipitation for P removal. Causes of the proliferation of glycogen accumulating organisms (GAOs) observed in the unaerated/oxic activated sludge unit of this system were investigated both in full-scale and in lab-scale experiments combined with a detailed analysis of the microbial communities. Concentration profile measurements throughout the 8-stage activated sludge unit indicated anaerobic conditions in the first two unaerated reactors and low orthophosphate level (< 1 mg l(-1)) in all of the stages that could not be attributed to the influent quality, but to Fe (III)-dosing to the returned activated sludge. Microbiological analysis revealed the presence of GAOs from the GB group in the Gammaproteobacteria and occasionally tetrad-forming organisms from Actinobacteria, and the absence of Rhodocyclus-related polyphosphate accumulating organisms (PAOs) in the activated sludge samples. Comparative lab-scale studies carried out in two identically arranged UCT-systems with staged anoxic reactors also confirmed that Fe (III)-dosing may result in phosphorus deficiency of the microbial niche, leading to the suppression of growth and EBPR activity of PAOs and to the proliferation of GAOs
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Ferric Compounds
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|a Tardy, G
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|a Liu, W T
|e verfasserin
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 54(2006), 1 vom: 02., Seite 101-9
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|x 0273-1223
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