Biological phosphate removal by activated sludge under defined conditions

Appeldoorn, K.J.; Kortstee, G.J.J.; Zehnder, Alexander J. B.

doi:10.1016/0043-1354(92)90045-6

Cited by 42 publications

(27 citation statements)

References 19 publications

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“…The concentration of the acidogenic P-PO 4 feed was adjusted according to AppeldoornÏs medium. 9 The process was fed with a mixture of concentrated (20-fold) medium (100 cm3 day~1) and a part of the SBR effluent (1900 cm3 day~1). The acidogenic outlet was the methanogenic inlet (1320 cm3 day~1).…”

Section: Runmentioning

confidence: 99%

“…Although most studies about nutrient removal have been carried out with continuous Ñow reactors, SBR technology with anaerobic and aerobic operations is a very promising process for nutrient removal. 9 In the proposed process, the fermented wastewater, containing VFA as the result of acid fermentation of organic compounds in the Ðrst unit, is conveyed to a biological nutrient removal SBR and to a methanogenic unit where phosphorus and carbon respectively are removed. The objective of the work was to establish carbon, nitrogen and phosphorus elimination activities in steady state conditions.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous removal of carbon, nitrogen and phosphorus from wastewater by coupling two-step anaerobic digestion with a sequencing batch reactor

Rustrían

Delgenès

Bernet

et al. 1998

J. Chem. Technol. Biotechnol.

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: The objective of this study was to develop an integrated process for simultaneous removal of carbon, nitrogen and phosphorus from industrial wastewaters. The process consisted of a-two step anaerobic digestion reactor, for carbon removal, coupled with a sequencing batch reactor (SBR) for nutrient removal. In the proposed process, carbon is eliminated into biogas by anaerobic digestion : acidogenesis and methanogenesis. The volatile fatty acids (VFA) produced during the Ðrst step of anaerobic digestion can be used as electron donors for both dephosphatation and denitriÐcation. In the third reactor (SBR) dephosphatation and nitriÐcation are induced through the application of an anaerobicÈaerobic cycle. This paper describes the Ðrst trials and experiments on the SBR and a period of 210 days during which the SBR was connected to the acidogenic and methanogenic reactors. It was shown that nitriÐcation of ammonia took place in the SBR reactor, during the aerobic phase. Furthermore, denitriÐcation and VFA production were achieved together in the acidogenic reactor, when the efflux of nitrates from the SBR reactor was added to the Ðrst reactor inÑux. The proposed process was fed with a synthetic industrial wastewater, the composition of which was : total organic carbon (TOC) \ 2200 mg dm~3, total Kjeldahl nitrogen (TKN) \ 86 mg dm~3, phosphorus under phosphate form (Pmg dm~3. In these conditions, removals of carbon, PO 4 ) \ 20 nitrogen and phosphorus were 98%, 78% and 95% respectively. The results show that the combination of the two-step anaerobic digestion reactor and an SBR reactor is e †ective for simultaneous carbon, nitrogen and phosphorus removal. Reactor arrangements enabled zones of bacterial populations to exist. Complete denitriÐcation occurred in the acidogenic reactor and hence the anaerobic activity was not reduced or inhibited by the presence of nitrate, thus allowing high TOC removal. Stable phosphorus release and phosphorus uptake took place in the SBR after coupling of the three reactors. A fast-settling compact sludge was generated in the SBR with the operational conditions applied, thus giving good separation of supernatant Ñuid. The beneÐts from this process are the saving of (i) an external carbon source for denitriÐcation and phosphorus removal, (ii) a reactor for the denitriÐcation step.

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Section: Runmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of carbon, nitrogen and phosphorus from wastewater by coupling two-step anaerobic digestion with a sequencing batch reactor

Rustrían

Delgenès

Bernet

et al. 1998

J. Chem. Technol. Biotechnol.

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“…Under anaerobic condition for 1 h, some of the organic matter in the sewage was sequestered by the biomass. Then, at Stage 2, the mixed liquor was pumped by P-2 to Reactor-N and was kept anaerobic for 30 min, allowing phosphorus to be released (Appeldoorn et al, 1992). Reactor-N was then aerated at Stage 3 for 11.5 h to facilitate nitrification and phosphorus uptake.…”

Section: Methodsmentioning

confidence: 99%

Removal of nitrogen and phosphorus in batch reactors with fibrous packing

Fang

Ling

1995

Bioresource Technology

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“…Under anaerobic conditions the denitrifying ordinary heterotrophic organisms (dOHO) activity is inhibited due to the lack of electron acceptors and therefore the acetate (S A ) is only used by the PAOs for the PHA storage process. Consequently the anaerobic reactor is, to some extent, mandatory for a stable EBPR process (Appeldoorm et al, 1992;Henze et al, 1999;Oehmen et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The external carbon addition has the role of providing sufficient VFA into the system to enhance the production of PHA and therefore improve P removal. Several external carbon sources have been studied to balance the COD deficiency in wastewaters (Gerber et al, 1986;Jones, et al, 1987;Winter, 1989;Appeldoorm, et al, 1992;Isaacs et al, 1994;Hallin. et al, 1996;Guerrero et al, 2012;Tayà et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Development and economic assessment of different WWTP control strategies for optimal simultaneous removal of carbon, nitrogen and phosphorus

Ostace

Baeza

Guerrero

et al. 2013

Computers & Chemical Engineering

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This paper presents the comparison of four control strategies for the A 2 /O WWTP configuration for simultaneous C, N and P removal. The control strategies: i) external COD-P control; ii) external recycle flow-P control; iii) nitrate control in the last anoxic reactor; iv) ammonia control in the last aerobic reactor, were combined with other common control loops to build different control structures and were simulated in Matlab/Simulink under different influent conditions. A systematic approach was conducted with all the strategies to assess their potential effectiveness, according to the following steps: theoretical design, setpoint optimization and, finally, a detailed comparison of the control results against a reference operation and an optimized reference scenario. The optimization of the reference operation presented a 7 % reduction of the total operational cost. The simulation results showed that some control strategies further reduced 3-7.5% the WWTP operational costs while the effluent quality is greatly improved.

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Biological phosphate removal by activated sludge under defined conditions

Cited by 42 publications

References 19 publications

Simultaneous removal of carbon, nitrogen and phosphorus from wastewater by coupling two-step anaerobic digestion with a sequencing batch reactor

Simultaneous removal of carbon, nitrogen and phosphorus from wastewater by coupling two-step anaerobic digestion with a sequencing batch reactor

Removal of nitrogen and phosphorus in batch reactors with fibrous packing

Development and economic assessment of different WWTP control strategies for optimal simultaneous removal of carbon, nitrogen and phosphorus

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