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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
Author(s) -
Girard Luiza,
Encina Pedro A.G.,
Rodriguez Elisa R.
Publication year - 2012
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143011x13233670703378
Subject(s) - anoxic waters , denitrifying bacteria , anaerobic exercise , wastewater , population , enhanced biological phosphorus removal , polyphosphate , phosphorus , organism , sewage treatment , acetic acid , environmental chemistry , biology , chemistry , food science , pulp and paper industry , denitrification , biochemistry , environmental engineering , nitrogen , activated sludge , phosphate , environmental science , organic chemistry , physiology , engineering , paleontology , demography , sociology
A pilot plant anaerobic/anoxic/oxic (A 2 /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.