DOF/DAF comparison for the treatment of milk industry wastewater
The objective of this study was to evaluate the efficiency of dissolved ozone flotation (DOF) in comparison to dissolved air flotation (DAF) for treatment of milk industry wastewater (MW). In the first phase of the experiment, a synthetic milk wastewater (SMW) was used to evaluate DOF and DAF, with...
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| Format: | Article |
| Language: | English |
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Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
2020-10-01
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| Series: | Revista Ambiente & Água |
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| Online Access: | https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2020000500302&lng=en&nrm=iso&tlng=en |
| _version_ | 1818647652472979456 |
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| author | Magno dos Santos Pereira Alisson Carraro Borges Gustavo Lopes Muniz Fernanda Fernandes Heleno Lêda Rita D'Antonino Faroni |
| author_facet | Magno dos Santos Pereira Alisson Carraro Borges Gustavo Lopes Muniz Fernanda Fernandes Heleno Lêda Rita D'Antonino Faroni |
| author_sort | Magno dos Santos Pereira |
| collection | DOAJ |
| description | The objective of this study was to evaluate the efficiency of dissolved ozone flotation (DOF) in comparison to dissolved air flotation (DAF) for treatment of milk industry wastewater (MW). In the first phase of the experiment, a synthetic milk wastewater (SMW) was used to evaluate DOF and DAF, with and without addition of hydrogen peroxide, at pH 4.0 and pH 11.4. In the DOF tests, the concentration of ozone was equal to 19 (± 0.5) mg L-1 and in the tests with addition of hydrogen peroxide, the H2O2/O3 ratios tested were 0.5, 1.0 and 1.5. In the second phase, tests were performed using three MW from three different industries to validate the results obtained and to determine the DOF system's ability to treat this type of effluent. The parameters tested during validation were turbidity, total suspended solids, oils and greases (O&G), chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN) and total phosphorus (TP). It was observed that the efficiency of the treatments was better at pH 4.0. The results showed a reduction of the efficiency with the use of DOF. The addition of H2O2 in DAF and DOF also resulted in reduced system efficiency. The results obtained with SMW only approximated those obtained with the MW from one of the industries that contained the largest traces of milk and cheese. |
| first_indexed | 2024-12-17T01:05:56Z |
| format | Article |
| id | doaj.art-03ada95e79774a4b8460d4e24931fb74 |
| institution | Directory Open Access Journal |
| issn | 1980-993X |
| language | English |
| last_indexed | 2024-12-17T01:05:56Z |
| publishDate | 2020-10-01 |
| publisher | Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi) |
| record_format | Article |
| series | Revista Ambiente & Água |
| spelling | doaj.art-03ada95e79774a4b8460d4e24931fb742022-12-21T22:09:16ZengInstituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)Revista Ambiente & Água1980-993X2020-10-0115511410.4136/ambi-agua.2553DOF/DAF comparison for the treatment of milk industry wastewaterMagno dos Santos Pereira0https://orcid.org/0000-0002-2026-2441Alisson Carraro Borges1https://orcid.org/0000-0002-9729-6439Gustavo Lopes Muniz2https://orcid.org/0000-0002-6045-611XFernanda Fernandes Heleno3https://orcid.org/0000-0002-0423-5662Lêda Rita D'Antonino Faroni4https://orcid.org/0000-0001-8648-5034Departamento de Engenharia Agrícola. Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, CEP: 36570-900, Viçosa, MG, Brazil. Departamento de Engenharia Agrícola. Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, CEP: 36570-900, Viçosa, MG, Brazil. Departamento de Engenharia Agrícola. Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, CEP: 36570-900, Viçosa, MG, Brazil. Departamento de Engenharia Agrícola. Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, CEP: 36570-900, Viçosa, MG, Brazil. Departamento de Engenharia Agrícola. Universidade Federal de Viçosa (UFV), Avenida PH Rolfs, s/n, CEP: 36570-900, Viçosa, MG, Brazil. The objective of this study was to evaluate the efficiency of dissolved ozone flotation (DOF) in comparison to dissolved air flotation (DAF) for treatment of milk industry wastewater (MW). In the first phase of the experiment, a synthetic milk wastewater (SMW) was used to evaluate DOF and DAF, with and without addition of hydrogen peroxide, at pH 4.0 and pH 11.4. In the DOF tests, the concentration of ozone was equal to 19 (± 0.5) mg L-1 and in the tests with addition of hydrogen peroxide, the H2O2/O3 ratios tested were 0.5, 1.0 and 1.5. In the second phase, tests were performed using three MW from three different industries to validate the results obtained and to determine the DOF system's ability to treat this type of effluent. The parameters tested during validation were turbidity, total suspended solids, oils and greases (O&G), chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN) and total phosphorus (TP). It was observed that the efficiency of the treatments was better at pH 4.0. The results showed a reduction of the efficiency with the use of DOF. The addition of H2O2 in DAF and DOF also resulted in reduced system efficiency. The results obtained with SMW only approximated those obtained with the MW from one of the industries that contained the largest traces of milk and cheese.https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2020000500302&lng=en&nrm=iso&tlng=enadvanced oxidation processdairy wastewaterdissolved ozone flotation |
| spellingShingle | Magno dos Santos Pereira Alisson Carraro Borges Gustavo Lopes Muniz Fernanda Fernandes Heleno Lêda Rita D'Antonino Faroni DOF/DAF comparison for the treatment of milk industry wastewater Revista Ambiente & Água advanced oxidation process dairy wastewater dissolved ozone flotation |
| title | DOF/DAF comparison for the treatment of milk industry wastewater |
| title_full | DOF/DAF comparison for the treatment of milk industry wastewater |
| title_fullStr | DOF/DAF comparison for the treatment of milk industry wastewater |
| title_full_unstemmed | DOF/DAF comparison for the treatment of milk industry wastewater |
| title_short | DOF/DAF comparison for the treatment of milk industry wastewater |
| title_sort | dof daf comparison for the treatment of milk industry wastewater |
| topic | advanced oxidation process dairy wastewater dissolved ozone flotation |
| url | https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2020000500302&lng=en&nrm=iso&tlng=en |
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