title: Dynamics of intracellular polymers in enhanced biological phosphorus removal processes under different organic carbon concentrations.
abstract: Enhanced biological phosphorus removal (EBPR) may deteriorate or fail during low organic carbon loading periods. Polyphosphate accumulating organisms (PAOs) in EBPR were acclimated under both high and low organic carbon conditions, and then dynamics of polymers in typical cycles, anaerobic conditions with excess organic carbons, and endogenous respiration conditions were examined. After long-term acclimation, it was found that organic loading rates did not affect the yield of PAOs and the applied low organic carbon concentrations were advantageous for the enrichment of PAOs. A low influent organic carbon concentration induced a high production of extracellular carbohydrate. During both anaerobic and aerobic endogenous respirations, when glycogen decreased to around 80 ± 10 mg C per gram of volatile suspended solids, PAOs began to utilize polyphosphate significantly. Regressed by the first-order reaction model, glycogen possessed the highest degradation rate and then was followed by polyphosphate, while biomass decay had the lowest degradation rate.
authors.affiliation: School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, Shandong, 250101, China.
authors.forename: Lizhen
authors.initials: L
authors.lastname: Xing
authors.affiliation: School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, Shandong, 250101, China.
authors.forename: Li
authors.initials: L
authors.lastname: Ren
authors.affiliation: Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong, 518055, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Tang
authors.affiliation: Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong, 518055, China.
authors.forename: Guangxue
authors.initials: G
authors.lastname: Wu
authors.affiliation: Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong, 518055, China.
authors.forename: Yuntao
authors.initials: Y
authors.lastname: Guan
mesh_terms: D001421:Bacteria, Anaerobic / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002241:Carbohydrates / Q000737:chemistry; D002244:Carbon / Q000737:chemistry / Q000378:metabolism*; D006003:Glycogen / Q000378:metabolism; D006801:Humans; D010758:Phosphorus / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011122:Polyphosphates / Q000737:chemistry
chemical_list: D002241:Carbohydrates; D011108:Polymers; D011122:Polyphosphates; D010758:Phosphorus; D002244:Carbon; D006003:Glycogen