Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

López, Clàudia; Pons, Marie‐Noëlle; Morgenroth, Eberhard

doi:10.1016/j.watres.2006.01.040

Cited by 126 publications

(94 citation statements)

References 54 publications

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“…Seed microorganisms (aerobic sludge) were obtained from Eastern Municipal Wastewater Treatment Plant in Ube City, Yamaguchi, Japan. The components per liter of the synthetic wastewater were as follows: 586 mg CH 3 COONa, 100.8 mg NH 4 Cl, 5 mg peptone, 75.5 mg NaH 2 PO 4 ·2H 2 O, 72 mg KCl, 225 mg NaHCO 3 , 180 mg MgSO 4 ·7H 2 O, 14 mg CaCl 2 ·H 2 O, 5 mg yeast extract and 0.3 mL of mineral salt solution (Lopez et al, 2006 (Broughton et al, 2008). The initial pH of POSBRs was 7.5 -7.7 (Jeon et al, 2001), and the reactor was operated at room temperate.…”

Section: Laboratory Systemmentioning

confidence: 99%

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Effect of Different Anaerobic-Aerobic Time on the Biological Phosphorus Removal by a Sequencing Batch Reactor Using Pressurized Pure Oxygen

Wei

Imai

Higuchi

et al. 2013

J. of Wat. ^|^ Envir. Tech.

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The effect of the different ratios of anaerobic-aerobic time on the efficiency of enhanced biological phosphorus removal (EBPR) from synthetic wastewater with acetate as carbon source was investigated. Three pressurized pure oxygen sequencing batch reactor (POSBR) experiments were operated with a final pressure of 0.05 MPa. The reactors (POSBR1, POSBR2 and POSBR3) were developed and studied at different anaerobic-aerobic ratios of 3 : 3.5, 3 : 2.5 and 3 : 1.5, respectively. The laboratory results showed that for the polyphosphate-accumulating organisms (PAOs) more polyhydroxyalkanoates (PHAs) accumulated and phosphate was released in the anaerobic stage, while higher concentration of phosphate was taken up in the aerobic period. However, the POSBR2 had a greater phosphate release to uptake ratio than POSBR1 and POSBR3, which resulted in a much higher phosphorus removal efficiency (93.8%) than the other two operations (70.7% and 53.1%, respectively) within 30 days of operation. It was also found that POSBR2 synthesized more PHAs than others. The highest PHAs storage was observed during the anaerobic phase of POSBR2. Due to the influence of the time ratios on the PHA concentration and consumption, the condition of POSBR2 was favorable for the existence of PAO and therefore, beneficial for the biological phosphorus removal process.

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Section: Laboratory Systemmentioning

confidence: 99%

“…The theory of excess/surplus uptake of phosphorus is now well developed (Wentzel et al, 1990;Lopez et al, 2006). In enhanced biological phosphorus removal (EBPR), a short anaerobic stage is implemented prior to the aeration stage.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Anaerobic-Aerobic Time on the Biological Phosphorus Removal by a Sequencing Batch Reactor Using Pressurized Pure Oxygen

Wei

Imai

Higuchi

et al. 2013

J. of Wat. ^|^ Envir. Tech.

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“…Such a short aeration period is not expected to result in significant changes to the polyphosphate and glycogen pools in PAO cells (Brdjanovic et al, 1998;Lopez et al, 2006), which are required in the subsequent anaerobic period. The sludge was then settled and supernatant separated from the biomass.…”

Section: Batch Experimentsmentioning

confidence: 99%

Characterizing the biochemical activity of full‐scale enhanced biological phosphorus removal systems: A comparison with metabolic models

Pijuan

Oehmen

Baeza

et al. 2007

Biotech & Bioengineering

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The metabolism of polyphosphate accumulating organisms (PAOs) has been widely studied through the use of lab-scale enrichments. Various metabolic models have been formulated, based on the results from lab-scale experiments using enriched PAO cultures. A comparison between the anaerobic stoichiometry predicted by metabolic models with that exhibited by full-scale sludge in enhanced biological phosphorus removal (EBPR) wastewater treatment plants (WWTPs) was performed in this study. Batch experiments were carried out with either acetate or propionate as the sole carbon source, using sludges from two different EBPR-WWTPs in Australia that achieved different phosphorus removal performances. The results support the hypothesis that the anaerobic degradation of glycogen is the primary source of reducing equivalents generated by PAOs, however, they also suggested a partial contribution of the tricarboxylic acid (TCA) cycle in some cases. The experimental results obtained when acetate was the carbon source suggest the involvement of the modified succinate-propionate pathway for the generation of poly-beta-hydroxyvalerate (PHV). Overall, the batch test results obtained from full-scale EBPR sludge with both substrates were generally well described by metabolic model predictions for PAOs.

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“…Therefore, the biomass may be in famine periods for hours, and even for days or weeks. Such famine periods can significantly affect the amount and activity of active microorganisms and performance of a waste water treatment system [31,32,33,34]. Therefore, the ability of the biomass to survive under such conditions needs to be investigated in order to achieve reliable biological waste water treatment [35].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Poly ?-Hydroxy Butyrate Production by Alcaligenes Latus MTCC2311 using Central Composite Design

Veeramanikandan¹,

Mrudula²,

Yuvaraj³

et al. 2013

IJCA

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Considering the industrial interest of poly-b-hydroxy butyrate (PHB) and its high production cost, work has been undertaken for the production of PHB by Alcaligenes latus (2311). Different industrial wastes (sesame, molasses, sago and paper waste) were used as a cheap substrate to minimize the production of cost and nitrogen limited minimal agar synthetic medium was also used for comparison. Accumulation of PHB granules in the organism was analyzed by sudan black method. The PHB production in various industrial waste based medium and nitrogen limited minimal agar synthetic medium was studied by crotonic acid method. The pure form of PHB was collected and qualitatively analyzed by infrared and nuclear magnetic resonance methods. Highest PHB production was found in nitrogen limited minimal agar synthetic medium. Among the various industrial wastes based media, highest yield was obtained with sesame oil waste as carbon source KeywordsPoly-β-hydroxy butyrate, PHB, Alcaligenes latus MTCC 2311, CCD, bacterial polyesters.

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Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

Cited by 126 publications

References 54 publications

Effect of Different Anaerobic-Aerobic Time on the Biological Phosphorus Removal by a Sequencing Batch Reactor Using Pressurized Pure Oxygen

Effect of Different Anaerobic-Aerobic Time on the Biological Phosphorus Removal by a Sequencing Batch Reactor Using Pressurized Pure Oxygen

Characterizing the biochemical activity of full‐scale enhanced biological phosphorus removal systems: A comparison with metabolic models

Optimization of Poly ?-Hydroxy Butyrate Production by Alcaligenes Latus MTCC2311 using Central Composite Design

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