title: Basic study on anaerobic biological filtration using a floating filter media.
abstract: An experiment of anaerobic filtration using a floating media was carried out in this study. In the present system, a bench-scale column of 50 mm in diameter and of 1500 mm in height and a floating media consisting of S-shaped polystyrene pieces were employed. The purpose of this study was to collect the basic data of anaerobic biological filtration using a floating media. Under the laboratory conditions, it was found that the start-up of an anaerobic biological filter took about half month at 20 degrees C and a lower BOD loading was favorable for this start-up. The BOD removal efficiency over 60% could be achieved at a BOD volumetric loading of the filter bed under 6 kg/m3/d. An effluent BOD concentration became high when the flow rate was high, especially with circulation of treated water, which afforded a large effect on an effluent BOD concentration. As for the mechanism of BOD removal by anaerobic filtration, it was evident that long retention time worked in favor for organic acid generation, and the circulation of treated water promoted decomposition of organic acids.
authors.affiliation: Department of Environmental Science and Engineering, Harbin Institute of Technology, Nangang, Harbin, China.
authors.forename: Weimin
authors.initials: W
authors.lastname: Xie
authors.forename: Qunhui
authors.initials: Q
authors.lastname: Wang
authors.forename: Huiling
authors.initials: H
authors.lastname: Liu
authors.forename: Masao
authors.initials: M
authors.lastname: Kondo
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Ohsumi
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Ogawa
mesh_terms: D001421:Bacteria, Anaerobic; D001673:Biodegradation, Environmental; D005374:Filtration; D010316:Particle Size; D011137:Polystyrenes / Q000302:isolation & purification*; D014873:Water Pollutants / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D011137:Polystyrenes; D014873:Water Pollutants