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231223s2007 xx ||||| 00| ||eng c |
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|a pubmed24n0590.xml
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|a (DE-627)NLM176890610
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|a (NLM)18198694
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a López-Vázquez, Carlos M
|e verfasserin
|4 aut
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| 245 |
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|a A practical method for quantification of phosphorus- and glycogen-accumulating organism populations in activated sludge systems
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| 264 |
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|c 2007
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 03.03.2008
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|a Date Revised 23.09.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a Enhanced biological phosphorus removal (EBPR) from wastewater relies on the enrichment of activated sludge with phosphorus-accumulating organisms (PAOs). The presence and proliferation of glycogen-accumulating organisms (GAOs), which compete for substrate with PAOs, may be detrimental for EBPR systems, leading to deterioration and, in extreme cases, failure of the process. Therefore, from both process evaluation and modeling perspectives, the estimation of PAO and GAO populations in activated sludge systems is a relevant issue. A simple method for the quantification of PAO and GAO population fractions in activated sludge systems is presented in this paper. To develop such a method, the activity observed in anaerobic batch tests executed with different PAO/GAO ratios, by mixing highly enriched PAO and GAO cultures, was studied. Strong correlations between PAO/GAO population ratios and biomass activity were observed (R2 > 0.97). This served as a basis for the proposal of a simple and practical method to quantify the PAO and GAO populations in activated sludge systems, based on commonly measured and reliable analytical parameters (i.e., mixed liquor suspended solids, acetate, and orthophosphate) without requiring molecular techniques. This method relies on the estimation of the total active biomass population under anaerobic conditions (PAO plus GAO populations), by measuring the maximum acetate uptake rate in the presence of excess acetate. Later, the PAO and GAO populations present in the activated sludge system can be estimated, by taking into account the PAO/GAO ratio calculated on the basis of the anaerobic phosphorus release-to-acetate consumed ratio. The proposed method was evaluated using activated sludge from municipal wastewater treatment plants. The results from the quantification performed following the proposed method were compared with direct population estimations carried out with fluorescence in situ hybridization analysis (determining Candidatus Accumulibacter Phosphatis as PAO and Candidatus Competibacter Phosphatis as GAO). The method showed to be potentially suitable to estimate the PAO and GAO populations regarding the total PAO-GAO biomass. It could be used, not only to evaluate the performance of EBPR systems, but also in the calibration of potential activated sludge mathematical models, regarding the PAO-GAO coexistence
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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7 |
|a Acetates
|2 NLM
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7 |
|a Sewage
|2 NLM
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| 650 |
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7 |
|a Phosphorus
|2 NLM
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| 650 |
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7 |
|a 27YLU75U4W
|2 NLM
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| 650 |
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7 |
|a Glycogen
|2 NLM
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| 650 |
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7 |
|a 9005-79-2
|2 NLM
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| 650 |
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7 |
|a Oxygen
|2 NLM
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| 650 |
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7 |
|a S88TT14065
|2 NLM
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| 700 |
1 |
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|a Hooijmans, Christine M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Brdjanovic, Damir
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gijzen, Huub J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a van Loosdrecht, Mark C M
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 79(2007), 13 vom: 15. Dez., Seite 2487-98
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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| 773 |
1 |
8 |
|g volume:79
|g year:2007
|g number:13
|g day:15
|g month:12
|g pages:2487-98
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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|a AR
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|d 79
|j 2007
|e 13
|b 15
|c 12
|h 2487-98
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