The role of glucose in developing enhanced biological phosphorus removal

2001 ◽  
Vol 3 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Niandong Wang ◽  
Gordon Hill ◽  
Jian Peng
Keyword(s):  
Phosphorus Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Biological Phosphorus

A flux-based stoichiometric model of enhanced biological phosphorus removal metabolism

1998 ◽  
Vol 37 (4-5) ◽  
pp. 609-613
Author(s):  
J. Pramanik ◽  
P. L. Trelstad ◽  
J. D. Keasling
Keyword(s):  
Phosphorus Removal ◽  
Reaction Network ◽  
Bacterial Biomass ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Stoichiometric Model ◽  
Aerobic Reactor ◽  
Complete Set ◽  
Biological Phosphorus

Enhanced biological phosphorus removal (EBPR) in wastewater treatment involves metabolic cycling through the biopolymers polyphosphate (polyP), polyhydroxybutyrate (PHB), and glycogen. This cycling is induced through treatment systems that alternate between carbon-rich anaerobic and carbon-poor aerobic reactor basins. While the appearance and disappearance of these biopolymers has been documented, the intracellular pressures that regulate their synthesis and degradation are not well understood. Current models of the EBPR process have examined a limited number of metabolic pathways that are frequently lumped into an even smaller number of “reactions.” This work, on the other hand, uses a stoichiometric model that contains a complete set of the pathways involved in bacterial biomass synthesis and energy production to examine EBPR metabolism. Using the stoichiometric model we were able to analyze the role of EBPR metabolism within the larger context of total cellular metabolism, as well as predict the flux distribution of carbon and energy fluxes throughout the total reaction network. The model was able to predict the consumption of PHB, the degradation of polyP, the uptake of acetate and the release of Pi. It demonstrated the relationship between acetate uptake and Pi release, and the effect of pH on this relationship. The model also allowed analysis of growth metabolism with respect to EBPR.

scholarly journals Layered Extraction and Adsorption Performance of Extracellular Polymeric Substances from Activated Sludge in the Enhanced Biological Phosphorus Removal Process

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3358 ◽  
Author(s):  
Daxue Li ◽  
Hailing Xi
Keyword(s):  
Activated Sludge ◽  
Functional Groups ◽  
Phosphorus Removal ◽  
Extracellular Polymeric Substances ◽  
Cation Exchange Resin ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Adsorption Performance ◽  
Biological Phosphorus

A large amount of phosphorus was found in the extracellular polymeric substances (EPS) of activated sludge used in enhanced biological phosphorus removal (EBPR), so the role of EPS and extracellular phosphorus in EBPR should not be neglected. The composition and properties of tightly bound EPS (TB-EPS) and loosely bound EPS (LB-EPS) were significantly different, and it was necessary to study the adsorption performance of EPS through the fractionating of activated sludge into LB-EPS, TB-EPS and microbial cells. In this study, the adsorption performance of LB-EPS and TB-EPS for phosphate was explored by extracting LB-EPS and TB-EPS via sonication and cation exchange resin (CER), respectively. The results indicated that the sonication-CER method was an efficient and reliable extraction method for EPS with a synergistic effect. The performance of EPS in the adsorption/complexing of phosphate was excellent because of its abundant functional groups. Specifically, the type and content of metal elements and functional groups in TB-EPS were much greater than those in LB-EPS, which led to the key role of TB-EPS in the adsorption/complexing of phosphate. Finally, a metabolic model for EBPR with consideration of the adsorption performance of LB-EPS and TB-EPS was proposed.

Potassium and Magnesium Requirements for Enhanced Biological Phosphorus Removal from Wastewater

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2203-2206 ◽  
Author(s):  
L. F. Rickard ◽  
S. A. McClintock
Keyword(s):  
Phosphorus Removal ◽  
Test Phase ◽  
Synthetic Wastewater ◽  
Molar Ratio ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
System A ◽  
Calcium Iron ◽  
Biological Phosphorus

The role of potassium (K) and magnesium (Mg) in enhanced biological phosphorus removal (EBPR) by activated sludge was studied using a bench-scale continuous-flow A/O system. A synthetic wastewater containing all the nutrients required for EBPR was used as the influent feed for the control phase of the experiment. The influent feed to the test phase of the experiment was changed to totally limit specific cations. The results clearly indicated that both K and Mg were absolutely required for successful EBPR. Failure of EBPR occurred when either K or Mg were eliminated from the influent. The molar ratio of K:P during anaerobic release and aerobic uptake was observed to be 0.22 mol/mol, while Mg:P was 0.30 mol/mol. Calcium was not required for successful EBPR. Neither calcium, iron, nor sodium were co-transported with phosphorus during release and uptake.

Calcium effect on enhanced biological phosphorus removal

2006 ◽  
Vol 53 (12) ◽  
pp. 29-37 ◽  
Author(s):  
R. Barat ◽  
T. Montoya ◽  
L. Borras ◽  
A. Seco ◽  
J. Ferrer
Keyword(s):  
Calcium Phosphate ◽  
Metabolic Pathway ◽  
Phosphorus Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
High Concentration ◽  
P Release ◽  
Calcium Effect ◽  
Biological Phosphorus

The role of calcium (Ca) in enhanced biological phosphorus removal and its possible implications on the metabolic pathway have been studied. The experience has been carried out in an SBR under anaerobic–aerobic conditions for biological phosphorus removal during 8 months. The variations of influent Ca concentration showed a clear influence on the EBPR process, detecting significant changes in YPO4. These YPO4 variations were not due to influent P/COD ratio, pH, denitrification and calcium phosphate formation. The YPO4 has been found to be highly dependent on the Ca concentration, increasing as Ca concentration decreases. The results suggest that high Ca concentrations produce “inert” granules of polyphosphate with Ca as a counterion that are not involved in P release and uptake. Furthermore, microbiological observations confirmed that appreciable changes in PAO and GAO populations were not observed. This behaviour could suggest a change in the bacterial metabolic pathway, with prevailing polyphosphate-accumulating metabolism (PAM) at low influent Ca concentration and glycogen-accumulating metabolism (GAM) at high concentration.

Assessment of crude glycerol for Enhanced Biological Phosphorus Removal: Stability and role of long chain fatty acids

Chemosphere ◽  
2015 ◽  
Vol 141 ◽  
pp. 50-56 ◽  
Author(s):  
Carlota Tayà ◽  
Javier Guerrero ◽  
María Eugenia Suárez-Ojeda ◽  
Albert Guisasola ◽  
Juan Antonio Baeza
Keyword(s):  
Fatty Acids ◽  
Phosphorus Removal ◽  
Crude Glycerol ◽  
Long Chain Fatty Acids ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Biological Phosphorus ◽  
Long Chain ◽  
Chain Fatty Acids
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