title: Simultaneous 4-chlorophenol and nitrogen removal in moving bed sequencing batch reactors packed with polyurethane foam cubes of various sizes.
abstract: Moving bed sequencing batch reactors (MBSBRs) packed with 8% (v/v) of 8-, 27- and 64-mL polyurethane (PU) foam cubes, respectively, were investigated for simultaneous 4-chlorophenol (4-CP) and nitrogen removal at increasing 4-CP concentration. When the 4-CP concentration exceeded 300 mg L(-1), the MBSBR with 27-mL foam cubes was observed to outperform the other MBSBRs in removing 4-CP and nitrogen. The reasons were: (1) there were more biomass in inner layer of the 27-mL cubes, compared to that of the 8-mL cubes, which was more shielded from the inhibitory effect of 4-CP and (2) the 27-mL cubes were more mobile than the 64-mL cubes. Although increasing 4-CP concentration to 600 mg L(-1) resulted in incomplete removal of 4-CP in the MBSBRs, results of the batch reactor with 27-mL foam cubes showed that complete 4-CP removal within the REACT period could be achieved by increasing the packing volume to 20%.
authors.affiliation: School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
authors.forename: Jun-Wei
authors.initials: JW
authors.lastname: Lim
authors.forename: Poh-Eng
authors.initials: PE
authors.lastname: Lim
authors.forename: Chye-Eng
authors.initials: CE
authors.lastname: Seng
authors.forename: Rohana
authors.initials: R
authors.lastname: Adnan
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D019149:Bioreactors / Q000382:microbiology; D002733:Chlorophenols / Q000302:isolation & purification* / Q000378:metabolism*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry; D009038:Motion; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism*; D010316:Particle Size; D011140:Polyurethanes / Q000737:chemistry*; D014462:Ultrafiltration / Q000295:instrumentation
chemical_list: D002733:Chlorophenols; D005740:Gases; D011140:Polyurethanes; C029107:4-chlorophenol; D009584:Nitrogen