title: Disinfection of hospital wastewater by continuous ozonization.
abstract: The disinfection of hospital wastewaters using the ozonization process was studied. The concentrations of ozone required to reach a sudden drop of coliform and Pseudomonas aeruginosa in the wastewater are 4.0-7.0 and 3.0-5.0 mg L(-1), respectively. For the hospital wastewater, the disinfection efficiencies were 0.518S(-1.1) for coliforms, 0.509S(-1.06) for Pseudomonas aeruginosa and 0.254S-(1.54) for total count, respectively. As to the effects of ozone input methods on the disinfection efficiency, the continuous ozonization process was ten times higher than the batch input process. The low COD removal rate was obtained at 25.0 mgL(-1) of ozone concentration for hospital wastewater. However, more biodegradable compounds resulted in the treated mixture.
authors.affiliation: Institute of Environmental Health, China Medical College, Taichung, Taiwan.
authors.forename: Chow-Feng
authors.initials: CF
authors.lastname: Chiang
authors.forename: Ching-Tsan
authors.initials: CT
authors.lastname: Tsai
authors.forename: Shaw-Tao
authors.initials: ST
authors.lastname: Lin
authors.forename: Chun-Pao
authors.initials: CP
authors.lastname: Huo
authors.forename: Kwang Victor
authors.initials: KV
authors.lastname: Lo
mesh_terms: D001673:Biodegradation, Environmental; D004203:Disinfection / Q000379:methods*; D004755:Enterobacteriaceae / Q000302:isolation & purification; D006761:Hospitals; D017744:Medical Waste Disposal / Q000379:methods*; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D011550:Pseudomonas aeruginosa / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D017744:Medical Waste Disposal; D010083:Oxidants, Photochemical; D010126:Ozone