Disinfection of sanitary effluent from a new anaerobic/aerobic baffled reactor configuration using ozone and ozone/hydrogen peroxide

• Grant number: 12/05297-9
• Support Opportunities: Scholarships in Brazil - Master
• Effective date (Start): July 01, 2012
• Effective date (End): June 30, 2014
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal Investigator: Gustavo Henrique Ribeiro da Silva
• Grantee: Nathalie Dyane Miranda Slompo
• Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

The availability of water resources worldwide has declined in the quantitative and qualitative, due to population growth and hence the undeniable attractions of the planned reuse of effluent arouse more interest worldwide. Alternatively, low cost arises then applying anaerobic/aerobic baffled reactor as one of methods for treating effluents, but these are limited in the removal of pathogenic organisms by increasing interest in the health disinfecting effluent. In Brazil, the alternatives the most commonly used are maturation ponds and chlorination. Studies conducted over chlorine shows, however, that this technology is ineffective in removing some microorganisms epidemic. Alternatives to chlorine compounds have been used, such as ozone and ozone/hydrogen peroxide (peroxone). The water disinfection with ozone is a widespread practice in European countries and the United States, but not widely used in Brazil, despite being the ozone disinfectant stronger and faster acting between the disinfecting agents used for disinfection of water and wastewater. There is, however, a concern due to the nature of the byproducts formed and its possible toxicity, but there is little information on these, so a greater number of studies need to be performed, since it is difficult to state with certainty which is on the effect of disinfectant mutagenicity of treated wastewater, and treatment processes must also be optimized to control such reactions and the concentrations are a problem to be solved for practical uses. This research aims to study ozone and ozone/hydrogen peroxide to disinfect sanitary wastewater, from processing of a new configuration of an anaerobic/aerobic baffled reactor, evaluating how these disinfectants act in the oxidation process and the efficiency of inactivation of coliform thermotolerant and Escherichia coli, comparing their efficiency and the formation of formaldehyde (main aldehyde formed) in the application of ozone and peroxone for disinfection. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MIRANDA SLOMPO, NATHALIE DYANE; RIBEIRO DA SILVA, GUSTAVO HENRIQUE. Disinfection of anaerobic/aerobic sanitary effluent using ozone: Formaldehyde formation. WATER ENVIRONMENT RESEARCH, v. 91, n. 9, p. 898-905, SEP 2019. (12/05297-9, 11/10816-2)

MIRANDA, N. D.; OLIVEIRA, E. L.; SILVA, G. H. R.. Study of constructed wetlands effluent disinfected with ozone. WATER SCIENCE AND TECHNOLOGY, v. 70, n. 1, p. 108-113, 2014. (11/10816-2, 12/05297-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SLOMPO, Nathalie Dyane Miranda. Ozonation and peroxidation of sanitary effluent from constructed westlands and anaerobic baffled reactor/aerobic aiming reuse. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Bauru Bauru.