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Process Performance and Polyphosphate‐Accumulating Organism‐Glycogen‐Accumulating Organism Communities in an Anaerobic/Anoxic/Oxic System Operated with Different Carbon Sources
A pilot plant anaerobic/anoxic/oxic (A2/O) system fed with domestic wastewater was operated to examine the effect of varying different types of carbon source (acetic acid, propionic acid, and glucose), added as a complement to the wastewater, on the (1) process performance and (2) microbial population. The operational condition that lead to a significant removal of total nitrogen (82%) was achieved with acetic acid. When the complementary carbon source was propionic acid, an improved removal efficiency of orthophosphate (97%) was observed. Because this finding was concurrent with higher polyphosphate‐accumulating organism (PAO) population fractions detected using fluorescent in situ hybridization analysis (41.9 ± 3.0%), it suggests that members of PAO populations that were able to reduce nitrate gained importance over PAO members that could not, thus improving the denitrifying phosphorus removal.
Process Performance and Polyphosphate‐Accumulating Organism‐Glycogen‐Accumulating Organism Communities in an Anaerobic/Anoxic/Oxic System Operated with Different Carbon Sources
A pilot plant anaerobic/anoxic/oxic (A2/O) system fed with domestic wastewater was operated to examine the effect of varying different types of carbon source (acetic acid, propionic acid, and glucose), added as a complement to the wastewater, on the (1) process performance and (2) microbial population. The operational condition that lead to a significant removal of total nitrogen (82%) was achieved with acetic acid. When the complementary carbon source was propionic acid, an improved removal efficiency of orthophosphate (97%) was observed. Because this finding was concurrent with higher polyphosphate‐accumulating organism (PAO) population fractions detected using fluorescent in situ hybridization analysis (41.9 ± 3.0%), it suggests that members of PAO populations that were able to reduce nitrate gained importance over PAO members that could not, thus improving the denitrifying phosphorus removal.
Process Performance and Polyphosphate‐Accumulating Organism‐Glycogen‐Accumulating Organism Communities in an Anaerobic/Anoxic/Oxic System Operated with Different Carbon Sources
Girard, Luiza (author) / Encina, Pedro A.G. (author) / Rodriguez, Elisa R. (author)
Water Environment Research ; 84 ; 354-361
2012-04-01
8 pages
Article (Journal)
Electronic Resource
English
GAO , nitrogen , PAO , carbon source , phosphorous , A2/O