A metabolic model of the biological phosphorus removal process: I. Effect of the sludge retention time

1995 ◽  
Vol 48 (3) ◽  
pp. 222-233 ◽  
Author(s):  
G. J. F. Smolders ◽  
J. M. Klop ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Metabolic Model ◽  
Biological Phosphorus Removal ◽  
Removal Process ◽  
Sludge Retention Time ◽  
Biological Phosphorus

A metabolic model of the biological phosphorus removal process: II. Validation during start-up conditions

1995 ◽  
Vol 48 (3) ◽  
pp. 234-245 ◽  
Author(s):  
G. J. F. Smolders ◽  
D. J. Bulstra ◽  
R. Jacobs ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Phosphorus Removal ◽  
Metabolic Model ◽  
Biological Phosphorus Removal ◽  
Removal Process ◽  
Start Up ◽  
Biological Phosphorus

A metabolic model for the biological phosphorus removal process

1995 ◽  
Vol 31 (2) ◽  
pp. 79-93 ◽  
Author(s):  
G. J. F. Smolders ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Steady State ◽  
Phosphorus Removal ◽  
Metabolic Model ◽  
Biological Phosphorus Removal ◽  
Removal Process ◽  
Wide Range ◽  
Model Predictions ◽  
Derived Set ◽  
Metabolic Reactions ◽  
Biological Phosphorus

A structured metabolic model of the biological phosphorus removal process has been developed. In this approach the model is based on the bioenergetics and stoichiometry of the metabolism. All relevant metabolic reactions underlying the P-metabolism, considering also ATP and NADH2, are described. The derived set of stoichiometry based linear relations is used to reduce the number of reactions and conversions rates required to describe the process. The model predictions were experimentally verified by measurement of the external acetate, phosphate and ammonium concentrations as well as the internal fractions of PHB and glycogen. The model is applied to dynamic and steady-state situations over a wide range of sludge ages. The derived structured metabolic model is very well capable of describing the complex conversions of the biological phosphorus removal process.

Biological denitrifying phosphorus removal in SBR: effect of added nitrate concentration and sludge retention time

2001 ◽  
Vol 43 (3) ◽  
pp. 191-194 ◽  
Author(s):  
M. Merzouki ◽  
N. Bernet ◽  
J.-P. Deigenès ◽  
R. Moletta ◽  
M. Benlemlih
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Synthetic Wastewater ◽  
Biological Phosphorus Removal ◽  
Denitrifying Phosphorus Removal ◽  
Sludge Retention Time ◽  
Two Parameters ◽  
Biological Phosphorus

Optimizing anoxic biological phosphorus removal in the anaerobic-anoxic sequencing batch reactor (A2 SBR) was observed to depend on two parameters: the amount of added nitrate and the sludge retention time (SRT). The concentration of 120 mg N-NO3 · l-1 in the anoxic medium and the SRT of 15 days were determined as optimal for a complete phosphorus removal in the A2 SBR. The reactor was supplied with synthetic wastewater containing 800 mg COD.l-1 acetic acid, 240 mg N-NH4·l-1 and 30 mg P-PO4·l-1. This study was completed by microscopic observations which revealed three morphological types of phosphate-accumulating bacteria (PAB).

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