Details

Autor(en) / Beteiligte

• Yasar, Abdullah
• Ahmad, Nasir
• Latif, Hummaira
• Amanat Ali Khan, Aamir

Titel

Pathogen Re-Growth in UASB Effluent Disinfected By UV, O3, H2O2, and Advanced Oxidation Processes

Ist Teil von

• Ozone: science & engineering, 2007-11, Vol.29 (6), p.485-492

Ort / Verlag

Philadelphia, PA: Taylor & Francis Group

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Disinfection of anaerobically treated effluent (UASB) was carried out to eliminate the enteric pathogens by using UV irradiation, peracetic acid, H 2 O 2 , O 3 and advanced oxidation processes (O 3 /H 2 O 2 , O 3 /UV and H 2 O 2 /UV). Re-growth potential of these pathogens was monitored in terms of time and temperature. Inactivation of pathogens by ozone at the rate of 300 mg/h for 20 minutes approached 99%. UV irradiation resulted in 99% pathogen removal at irradiation time of 120 seconds. A dose of 170 mg/L H 2 O 2 eliminated more than 99% pathogens. Samples disinfected with UV, H 2 O 2 and O 3 showed gradual re-growth with an increase in time and temperature (from 20 to 35°C). However, disinfection with AOPs proved to be the most effective tool resulting in reduction of treatment time taken by individual processes, also the disinfected samples showed minimal re-growth revealing the superiority of their combined effects.