Journal ArticleDOI
Model of the anaerobic metabolism of the biological phosphorus removal process: Stoichiometry and pH influence
TLDR
A structured metabolic model, based on glycogen as the source of the reduction equivalents in the anaerobic phase and the effect of the pH on the energy requirement of the uptake of acetate, is developed and explains the experimental results satisfactorily.Abstract:
In the anaerobic phase of a biological phosphorus removal process, acetate is taken up and converted to PHB utilizing both energy generated in the degradation of polyphosphate to phosphate, which is released, and energy generated in the conversion of glycogen to poly-beta-hydroxy butyrate (PHB). The phosphate/acetate ratio cannot be considered a metabolic constant, because the energy requirement for the uptake of acetate is strongly influenced by the pH value. The observed phosphate/acetate ratio shows a variation of 0.25 to 0.75 P-mol/C-mol in a pH range of 5.5 to 8.5. It is shown that stored glycogen takes part in the metabolism to provide reduction equivalents and energy for the conversion of acetate to PHB. A structured metabolic model, based on glycogen as the source of the reduction equivalents in the anaerobic phase and the effect of the pH on the energy requirement of the uptake of acetate, is developed. The model explains the experimental results satisfactorily. (c) 1994 John Wiley & Sons, Inc.read more
Citations
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Journal ArticleDOI
Advances in enhanced biological phosphorus removal: from micro to macro scale.
Adrian Oehmen,Paulo C. Lemos,Gilda Carvalho,Zhiguo Yuan,Jurg Keller,Linda L. Blackall,Maria A.M. Reis +6 more
TL;DR: This review paper critically assesses the recent advances that have been achieved in this field, particularly relating to the areas of EBPR microbiology, biochemistry, process operation and process modelling.
Journal ArticleDOI
Microbiology and biochemistry of the enhanced biological phosphate removal process
TL;DR: In this paper, a review of the microbiological and biochemical aspects of the enhanced biological phosphate removal (EBPR) process is presented, including microorganisms responsible for EBPR, isolation of polyphosphate accumulating organisms (PAOs), microbial diversity of the EBPR sludge, biochemical metabolisms of PAOs, energy budget in PAOs metabolism, denitrification by PAO, glycogen accumulating non-poly-P organisms (GAOs), etc.
Journal ArticleDOI
The microbiology of biological phosphorus removal in activated sludge systems.
TL;DR: The history of EBPR, the currently available biochemical models, the structure of the microbial communities found in EBPR systems, possible identities of the bacteria responsible, and the evidence why these systems might operate suboptimally are looked at.
Journal ArticleDOI
Simultaneous COD, nitrogen, and phosphate removal by aerobic granular sludge
TL;DR: Experimental results strongly suggest that P-removal occurs partly by (biologically induced) precipitation, and monitoring the laboratory scale reactors for a long period showed that N- Removal efficiency highly depends on the diameter of the granules.
Journal ArticleDOI
Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor.
TL;DR: Experimental results demonstrated that nitrogen removal was via nitrite, not nitrate, and showed that denitrifying glycogen‐accumulating organisms (DGAOs), rather than den itrifying polyphosphate‐ Accumulating organism (DPAOs), were responsible for the denitrification activity.
References
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Book ChapterDOI
The Role and Regulation of Energy Reserve Polymers in Micro-organisms
Edwin A. Dawes,P. J. Senior +1 more
TL;DR: The chapter considers the evidence for the energy-storage roles of glycogen, polyphosphates and poly-p-hydroxybutyrate, and the current state of knowledge concerning the regulation of their biosynthesis and degradation in the microbial cell.
Journal ArticleDOI
Biochemical model for enhanced biological phosphorus removal
TL;DR: A biochemical model that explains bio-P removal mechanisms occurring under anaerobic, aerobic and anoxic conditions of the process is presented and polyphosphate is suggested to be as a source of energy both for the reestablishment of the proton motive force and for substrate storage.
Book
Thermodynamics and Control of Biological Free-Energy Transduction
Hans V. Westerhoff,K. Van Dam +1 more
TL;DR: The core of mosaic non-equilibrium thermodynamics is the theory of metabolic control, a basis for thermodynamics in (quantum) mechanics and statistics and an extension to far from equilibrium systems.
Book
The Vital Force: A Study of Bioenergetics
TL;DR: The goal of He points out that bioenergetics has recently attained a degree of integration comparable to that of molecular genetics, and that the principle of energy coupling by ion currents, given a clear and general expression in Mitchell's chemiosmotic hypothesis, has provid-ed the possibility of giving a reasonably coherent account of how cells generate useful energy and perform work.