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| Author(s): |
Maiara Pereira Assis
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Civil, Arquitetura e Urbanismo |
| Defense date: | 2014-06-05 |
| Examining board members: |
José Gilberto Dalfré Filho;
José Roberto Guimarães;
Harry Edmar Schulz
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| Advisor: | Ana Inés Borri Genovez; José Gilberto Dalfré Filho |
| Abstract | |
Discussions on the scarcity of water and its quality for human consumption are keys for the water resources management. The water released as domestic and industrial sewage in water bodies poses a threat to public health. However, the water quality can be improved by controlling pollution and by improving the techniques of inactivation of microorganisms and degradation of compounds, which consists of destruction of microorganisms and degradation of chemicals. One of the alternative techniques for inactivation and degradation is to employ the phenomenon of cavitation. Cavitation develops shear stress within the fluid and, besides, may involve the release of hydroxyl radicals, which assist the oxidation of the compounds present in the water. The objective of this study was to develop a cavitating jet apparatus to inactivate Escherichia coli, using a new configuration with multiple jets. The new configuration of the equipment was tested and compared with the existing configuration at the Laboratory of Hydraulics and Fluid Mechanics in the search for the optimal efficiency. The results indicated a dependence of inactivation with the pressure of the equipment and the configuration of nozzles. A single orifice nozzle and lower pressures (up to 15.00 MPa) or a system of three-dimensional nozzles and higher pressures (around 30.00 MPa) obtained the best inactivation rates. The energy efficiency of the cavitating jet apparatus in the rate of inactivation was verified. In this case, the best alternatives depend on the time required for inactivation. The cavitating jet apparatus proved to be a viable alternative to the inactivation of Escherichia coli and can be used along with other inactivation techniques (AU) | |
| FAPESP's process: | 11/16347-4 - Development of a cavitating jet apparatus to treat wastewater using multiple jets |
| Grantee: | Maiara Pereira Assis Gratieri |
| Support Opportunities: | Scholarships in Brazil - Master |