UASB reactor effluent disinfection by ozone and chlorine

Author(s)

Ribeiro da Silva, Gustavo Henrique ^[1] ; Bruning, Harry ^[2] ; Gerrity, Daniel ^[3] ; Daniel, Luiz Antonio ^[4]

Affiliation

^[1] Sao Paulo State Univ UNESP, Fac Engn Bauru, Dept Civil & Environm Engn, BR-17033360 Bauru, SP - Brazil

^[2] Wageningen Univ, Subdept Environm Technol, NL-6700 AP Wageningen - Netherlands

^[3] Univ Nevada, Dept Civil & Environm Engn & Construct, Las Vegas, NV 89154 - USA

^[4] Sao Paulo Univ USP EESC, Dept Hydraul & Sanitat, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING; v. 50, n. 12, p. 1215-1222, OCT 15 2015.
• Web of Science Citations: 1

Abstract

This research studied the sequential ozone and chlorine process with respect to, the inactivation of indicator bacteria and the formation of ozone disinfection byproducts in sanitary wastewater effluent. The applied ozone doses were 5, 8 and 10mg.O-3.L-1, followed by chlorine doses of 10, 20 and 30mg.L-1, respectively. After the sequential ozone/chlorine process, the mean reduction in chemical oxygen demand ranged from 9 to 37%. Total coliform inactivation ranged from 1.59 to 3.73log(10), and E. coli was always <1 CFU 100mL(-1). Ozonation resulted in the formation of aldehydes, which were not significantly impacted by the subsequent chlorine dose (P <= 0.05). (AU)

• FAPESP's process: 05/02782-0 - Wastewater disinfection byproducts
• Grantee: Luiz Antonio Daniel
• Support Opportunities: Regular Research Grants