Disinfection of hospital wastewater by continuous ozonization.
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.
Chiang
Chow-Feng
CF
Institute of Environmental Health, China Medical College, Taichung, Taiwan.
Tsai
Ching-Tsan
CT
Lin
Shaw-Tao
ST
Huo
Chun-Pao
CP
Lo
Kwang Victor
KV
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*
D017744:Medical Waste Disposal; D010083:Oxidants, Photochemical; D010126:Ozone