title: Effects of filtration modes on membrane fouling behavior and treatment in submerged membrane bioreactor.
abstract: Relaxation or backwashing is obligatory for effective operation of membrane module and intermittent aeration is helpful for nutrients removal. This study was performed to investigate effects of different filtration modes on membrane fouling behavior and treatment in membrane bioreactor (MBR) operated at three modes i.e., 12, 10 and 8min filtration and 3, 2, and 2min relaxation corresponding to 6, 5 and 4cycles/hour, respectively. Various parameters including trans-membrane pressure, specific cake resistance, specific oxygen uptake rate, nutrients removal and sludge dewaterability were examined to optimize the filtration mode. TMP profiles showed that MBR(8+2) with 8min filtration and 2min relaxation reduced the fouling rate and depicted long filtration time in MBR treating synthetic wastewater. MBR(12+3) was more efficient in organic and nutrients removal while denitrification rate was high in MBR(8+2).
authors.affiliation: Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan.
authors.forename: Tahir
authors.initials: T
authors.lastname: Maqbool
authors.affiliation: Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan. Electronic address: sherjamal77@gmail.com.
authors.forename: Sher Jamal
authors.initials: SJ
authors.lastname: Khan
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea.
authors.forename: Chung-Hak
authors.initials: CH
authors.lastname: Lee
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D019149:Bioreactors / Q000382:microbiology*; D004866:Equipment Contamination; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D012722:Sewage / Q000382:microbiology*; D014462:Ultrafiltration / Q000295:instrumentation*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D008567:Membranes, Artificial; D012722:Sewage
keywords: Filtration modes; Membrane fouling rate; Membrane fouling resistance; Specific cake resistance; Submerged membrane bioreactor