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Evaluating the efficiency of carbon utilisation via bioenergetics between biological aerobic and denitrifying phosphorus removal systems
- Source :
- PLoS ONE, Vol 12, Iss 10, p e0187007 (2017), PLoS ONE
- Publication Year :
- 2017
- Publisher :
- Public Library of Science (PLoS), 2017.
-
Abstract
- There are two biological systems available for removing phosphorus from waste water, conventional phosphorus removal (CPR) and denitrifying phosphorus removal (DPR) systems, and each is characterized by the type of sludge used in the process. In this study, we compared the characteristics associated with the efficiency of carbon utilization between CPR and DPR sludge using acetate as a carbon source. For DPR sludge, the heat emitted during the phosphorus release and phosphorus uptake processes were 45.79 kJ/mol e- and 84.09 kJ/mol e-, respectively. These values were about 2 fold higher than the corresponding values obtained for CPR sludge, suggesting that much of the energy obtained from the carbon source was emitted as heat. Further study revealed a smaller microbial mass within the DPR sludge compared to CPR sludge, as shown by a lower sludge yield coefficient (0.05 gVSS/g COD versus 0.36 gVSS/g COD), a result that was due to the lower energy capturing efficiency of DPR sludge according to bioenergetic analysis. Although the efficiency of anoxic phosphorus removal was only 39% the efficiency of aerobic phosphorus removal, the consumption of carbon by DPR sludge was reduced by 27.8% compared to CPR sludge through the coupling of denitrification with dephosphatation.
- Subjects :
- 0301 basic medicine
Denitrification
Chemical Oxygen Demand
Marine and Aquatic Sciences
lcsh:Medicine
010501 environmental sciences
Sludge
Biochemistry
01 natural sciences
Carbon utilization
Bioreactors
Water Quality
Electron Acceptors
lcsh:Science
Free Energy
Multidisciplinary
Sewage
Chemistry
Physics
Chemical oxygen demand
Chemical Reactions
Phosphorus
Ketones
Pulp and paper industry
Anoxic waters
Aerobiosis
Enhanced biological phosphorus removal
Wastewater
Physical Sciences
Thermodynamics
Research Article
Pyruvate
Materials by Structure
Materials Science
030106 microbiology
Bioenergetics
Calorimetry
03 medical and health sciences
Denitrifying bacteria
Oxidation
Bioreactor
0105 earth and related environmental sciences
Nitrates
lcsh:R
Chemical Compounds
Biology and Life Sciences
Carbon
Earth Sciences
lcsh:Q
Energy Metabolism
Acids
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 12
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....73da9d9af57fea6a812028a904e0e45b