title: Performance of sequencing batch biofilm reactors with different control systems in treating synthetic municipal wastewater.
abstract: This study aimed to evaluate the performances of sequencing batch biofilm reactors (SBBRs) in removing nitrogen and phosphorus from synthetic municipal wastewater with different carbon to total nitrogen (C/N) ratios. The effect of control systems, including an intelligent control system (ICS) and conventional timer control system (TCS) on the performance of SBBRs was also investigated. When C/N ratios were 10.0, 5.0 and 3.3, the average COD removal efficiencies in the ICS-SBBR reached 87.7%, 92.3% and 97.6%, while total phosphorous (TP) removals reached 95.0%, 97.0% and 97.2%. When the C/N ratio was 5.0, the TN removal efficiency was 81.0% under ICS and 65.4% under TCS. Moreover, compared with TCS-SBBR, both reaction time and aeration time were shortened by 180 min and 157 min, respectively, in the ICS-SBBR. Therefore, the ICS-SBBR has potential in practical applications for significant nitrogen and phosphorus removal and energy savings.
authors.affiliation: School of Water Resources and Environment, China University of Geosciences, No. 29 Xueyuan Road, Beijing 100083, China.
authors.forename: Yunxiao
authors.initials: Y
authors.lastname: Jin
authors.forename: Dahu
authors.initials: D
authors.lastname: Ding
authors.forename: Chuanping
authors.initials: C
authors.lastname: Feng
authors.forename: Shuang
authors.initials: S
authors.lastname: Tong
authors.forename: Takashi
authors.initials: T
authors.lastname: Suemura
authors.forename: Feng
authors.initials: F
authors.lastname: Zhang
mesh_terms: D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D018441:Biofilms / Q000254:growth & development*; D019149:Bioreactors / Q000382:microbiology*; D002947:Cities; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D007220:Industrial Waste / Q000517:prevention & control*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical