The role of poly-hydroxy-alkanoate form in determining the response of enhanced biological phosphorus removal biomass to volatile fatty acids.
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.
Liu
Yan-Hua
YH
University of Central Florida, Orlando 32816-2450, USA.
Geiger
Cherie
C
Randall
Andrew Amis
AA
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
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