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Titolo:
EVALUATION OF UV DISINFECTION SYSTEMS FOR LARGE-SCALE SECONDARY EFFLUENT
Autore:
HO CFH; PITT P; MAMAIS D; CHIU C; JOLIS D;
Indirizzi:
SE WPCP,750 PHELPS ST SAN FRANCISCO CA 94124 PUBL UTILITIES COMMISS,WATER POLLUT CONTROL DIV SAN FRANCISCO CA 00000 EOA INC OAKLAND CA 00000 PUBL UTILITIES COMMISS,WATER QUAL BUR SAN FRANCISCO CA 00000
Titolo Testata:
Water environment research
fascicolo: 6, volume: 70, anno: 1998,
pagine: 1142 - 1150
SICI:
1061-4303(1998)70:6<1142:EOUDSF>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRAVIOLET DISINFECTION; WASTE-WATER; INACTIVATION; EFFICIENCY; LIGHT;
Keywords:
EFFLUENT DISINFECTION; ULTRAVIOLET (UV) LIGHT; PILOT STUDY; COLIFORM INACTIVATION; VIRUS INACTIVATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
C.F.H. Ho et al., "EVALUATION OF UV DISINFECTION SYSTEMS FOR LARGE-SCALE SECONDARY EFFLUENT", Water environment research, 70(6), 1998, pp. 1142-1150

Abstract

A study at the Southeast Water Pollution Control Plant, San Francisco, California, was undertaken to evaluate the feasibility of replacing its current secondary effluent chlorination system with a 6.57 m(3)/s ultraviolet (UV) disinfection system. Two vertical lamp units and one horizontal lamp unit were pilot tested in parallel. The effective UV dose for coliform removal and the effects of feedwater characteristics and reactor hydraulics were examined. The horizontal pilot unit gave amore consistent performance than the vertical pilot units. Based on the test results, a UV dose of 65 mW.s/cm(2) would be required for the plant to achieve the target effluent total coliform level (240 CFU/100mL) 95% of the time. The large fluctuation of UV disinfection resultscould be attributed to the wide range of feedwater quality inherent to a combined sewer system. High suspended solids, characteristic of the plant's secondary effluent during storm events, significantly increased the UV dose required to achieve the target coliform level. Existing UV inactivation models were evaluated. The hydraulic behavior of thepilot units was found to significantly affect their test results. Higher virus removal efficiency was observed with the UV systems than thefull-scale chlorination system.

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Documento generato il 27/11/20 alle ore 07:16:20