摘要:

The cysts of the nonpathogenic soil and water amoeba, Naegleriagruberi strain (NEG), were inactivated using aqueous ozone in batch reactors at controlled temperatures (5–30°C) at pH 7. The semi-log plots of survival ratio vs. time consisted of an initial shoulder followed by a linear portion. The log-log plots of ozone concentration against time for 99 percent inactivation were essentially linear. The relationship between the overall inactivation rate and absolute temperature was well expressed by the Arrhenius theory. An empirical relationship was developed between the extent of cyst inactivation, ozone dose, temperature, and contact time.

ISSN:0191-9512    

DOI:10.1080/01919518808552161

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Experiments using an ozone generator which has a fine steel wire electrode are described. Various conditions of the wire electrode ozone generator such as wire diameter, volume density of wire electrode, applied voltage and the effects of SF6addition also are reported. The efficiency of the wire electrode ozone generator in air exceeded that of the usual ozone generator for 0.1 mm wire diameter and 0.156 g cm−3volume density of wire over the entire range of applied voltage. This efficiency increases by adding 0.08% SF6in air. Increase of ozone and NOX formation in the air ozone generator can be explained by the reactions of O2and activated N2.

ISSN:0191-9512    

DOI:10.1080/01919518808552162

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

During drinking-water treatment, ozone used as a preoxidant and chlorine required for final disinfection, lead to competing chemical reactions, in the case of raw water containing both organic compounds and inorganic salts (such as bromides and ammonia).

ISSN:0191-9512    

DOI:10.1080/01919518808552163

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Ozone transfer to water or wastewater is necessary before desirable, effective ozone reactions occur. Several factors affect ozone transfer efficiency, including water quality characteristics, contactor configuration, and applied ozone characteristics. The design model presented in this paper addresses all factors affecting ozone transfer. The model was used to compare measured transfer efficiency with predicted transfer efficiency at four full-scale wastewater ozone disinfection facilities. A relatively good prediction was obtained at each plant.

ISSN:0191-9512    

DOI:10.1080/01919518808552164

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0191-9512    

DOI:10.1080/01919518808552160

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor