title: The role of poly-hydroxy-alkanoate form in determining the response of enhanced biological phosphorus removal biomass to volatile fatty acids.
abstract: Anaerobic-aerobic batch experiments indicated that poly-hydroxy-alkanoate (PHA) form was important in determining the net phosphorus removal resulting from different volatile fatty acids (VFAs). Poly-3-hydroxy-butyrate (3HB) content was found to correlate fairly well with higher observed aerobic phosphorus uptake per unit PHA carbon degraded. Poly-3-hydroxy-valerate (3HV) correlated with lower aerobic phosphorus uptakes per unit PHA carbon degraded. These experiments, conducted with synthetic wastewater, imply that VFA speciation might have a significant effect on aerobic phosphorus uptakes and net phosphorus removal. In addition, the model parameter fP.UPT (Barker and Dold, 1997) could vary with the proportion of acetic to propionic acid received (i.e., the acetic/propionic acid ratio may be an important parameter for these systems). Carbohydrate data implied that the lower aerobic phosphorus uptake resulting from 3HV might have been caused by a greater fraction of PHA carbon shunting to carbohydrate biosynthesis during aerobiosis.
authors: University of Central Florida, Orlando 32816-2450, USA.
authors: Yan-Hua
authors: YH
authors: Liu
authors: Cherie
authors: C
authors: Geiger
authors: Andrew Amis
authors: AA
authors: Randall
mesh_terms: D019342:Acetic Acid / Q000494:pharmacology; D000332:Aerobiosis; D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors; D001711:Biotransformation / Q000187:drug effects; D002241:Carbohydrates / Q000096:biosynthesis; D002244:Carbon / Q000378:metabolism; D005232:Fatty Acids, Volatile / Q000378:metabolism*; D045782:Hemiterpenes; D006863:Hydrogen-Ion Concentration; D006885:Hydroxybutyrates / Q000737:chemistry / Q000378:metabolism; D009243:NAD / Q000096:biosynthesis; D010421:Pentanoic Acids / Q000494:pharmacology; D010758:Phosphorus / Q000378:metabolism*; D011091:Polyesters / Q000737:chemistry / Q000378:metabolism*; D011422:Propionates / Q000494:pharmacology; D014631:Valerates / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D000094122:Polyhydroxybutyrates
chemical_list: D019342:Acetic Acid; D002241:Carbohydrates; D002244:Carbon; D005232:Fatty Acids, Volatile; D045782:Hemiterpenes; D006885:Hydroxybutyrates; D009243:NAD; D010421:Pentanoic Acids; D010758:Phosphorus; D011091:Polyesters; D011422:Propionates; D014631:Valerates; C008216:isovaleric acid; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates; C073314:poly(3-hydroxyvalerate); C029658:propionic acid