title: A comparison of endogenous processes during anaerobic starvation in anaerobic end sludge and aerobic end sludge from an anaerobic/anoxic/oxic sequencing batch reactor performing denitrifying phosphorus removal.
abstract: The endogenous processes in anaerobic end and aerobic end sludge responsible for biological denitrifying phosphorus removal were compared during a 7-d starvation under anaerobic conditions. The results showed that polyphosphate and glycogen were utilized simultaneously to generate maintenance energy for both the anaerobic and aerobic end sludge. During the 7-d starvation, the decay rate of denitrifying-phosphorus-accumulating-organisms (DPAOs) was higher for the aerobic end sludge than for the anaerobic end sludge. More energy was required for maintenance in the aerobic end sludge than for the anaerobic end sludge, with the greater amount of phosphorus release and glycogen degradation occurring in the aerobic end sludge. Moreover, different metabolic pathways for the endogenous processes were observed for the anaerobic and aerobic end sludge. After the 7-d starvation, the activity of DPAOs decreased more for the aerobic end sludge than that for the anaerobic end sludge.
authors: State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Siping Road, Shanghai 200092, PR China.
authors: Yayi
authors: Y
authors: Wang
authors: Junjun
authors: J
authors: Geng
authors: Yongzhen
authors: Y
authors: Peng
authors: Chong
authors: C
authors: Wang
authors: Gang
authors: G
authors: Guo
authors: Shanhu
authors: S
authors: Liu
mesh_terms: D001421:Bacteria, Anaerobic / Q000502:physiology*; D061249:Batch Cell Culture Techniques / Q000379:methods*; D019149:Bioreactors / Q000382:microbiology*; D058440:Denitrification / Q000502:physiology; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism; D010758:Phosphorus / Q000302:isolation & purification / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*
chemical_list: D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen; D010100:Oxygen