title: Filtration characteristics of immersed coarse pore filters in an activated sludge system for domestic wastewater reclamation.
abstract: The filtration characteristics of two different module configurations with coarse pore filter (non-woven fabric) were investigated for sludge floc separation in an activated sludge reactor for domestic wastewater reclamation. A polypropylene non-woven fabric filter (35 g/m2) was used for the two different module configurations, one flat and one tubular type, each with a filtration area of 0.052 m2. The different module types, submerged in the oxic compartment of A/O (anaerobic/oxic) type reactors, were operated simultaneously. The filtration fluxes were gradually increased from 0.5 to 1.2 and 1.73 m/d. The filtration pressures were more stably maintained for the tubular type module than the plate type. The tubular type module installed horizontally with two-side suction showed less filtration pressures than the tubular type module installed vertically with one-side suction. The solid separation was significantly high showing less than 5 mg/L effluent solids. The organic and T-N removal efficiencies were around 95 and 50%, respectively. The 85% removal of T-P was achieved with 20 mg/L injection of PAC (poly-aluminum chloride).
authors.affiliation: Department of Environmental Engineering, Changwon National University, Sarim-dong 9, Changwon, Gyeongnam 641-773, South Korea. gts@changwon.ac.kr
authors.forename: G T
authors.initials: GT
authors.lastname: Seo
authors.forename: B H
authors.initials: BH
authors.lastname: Moon
authors.forename: Y M
authors.initials: YM
authors.lastname: Park
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology; D005374:Filtration / Q000295:instrumentation*; D010316:Particle Size; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage