| Title | On-site treatment of textile yarn dyeing effluents using an integrated biological-chemical oxidation process |
| Abstract | This paper reports the results of the treatment of a yarn dyeing effluent using an integrated biological-chemical oxidation process. In particular, the biological unit was based on a sequencing batch biofilter granular sludge reactor (SBBGR), while the chemical treatment consisted of an ozonation step. Biological treatment alone was first performed as a reference for comparison. While biological treatment did not produce an effluent for direct discharge, the integrated process assured good treatment results, with satisfactory removal of chemical oxygen demand (up to 89.8 %), total nitrogen (up to 88.2 %), surfactants (up to 90.7 %) and colour (up to 99 %), with an ozone dose of 110 mg of ozone per litre of wastewater. Biomass characterization by fluorescence in situ hybridization has revealed that filamentous bacteria represented about 20 % of biomass (coherently with high sludge volume index values); thanks to its special design, SBBGR guaranteed, however, stable treatment performances and low effluent suspended solids concentrations, while conventional activated sludge systems suffer from sludge bulking and even treatment failure in such a condition. Furthermore, biomass characterization has evidenced the presence of a shortcut nitrification-denitrification process. © 2013 Islamic Azad University (IAU). |
| Source | International journal of environmental science and technology (Tehran) 11 (3), pp. 623–632 |
| Keywords | Biological treatmentBiomass characterizationIntegrated treatmentOzonationYarn dyeing wastewater |
| Journal | International journal of environmental science and technology (Tehran) |
| Editor | Iranian Society of Environmentalists, Center for Environment and Energy Research and Studies, Tehran, Iran |
| Year | 2014 |
| Type | Articolo in rivista |
| DOI | 10.1007/s13762-013-0271-7 |
| Authors | Lotito A.M.; De Sanctis M.; Rossetti S.; Lopez A.; Di Iaconi C. |
| Text | 299575 2014 10.1007/s13762 013 0271 7 Scopus 2 s2.0 84900372612 Biological treatment Biomass characterization Integrated treatment Ozonation Yarn dyeing wastewater On site treatment of textile yarn dyeing effluents using an integrated biological chemical oxidation process Lotito A.M.; De Sanctis M.; Rossetti S.; Lopez A.; Di Iaconi C. Department of Water Engineering and Chemistry, Politecnico di Bari, via Orabona 4, 70125 Bari, Italy; Water Research Institute, National Research Council, viale De Blasio 5, 70132 Bari, Italy; Water Research Institute, National Research Council, via Salaria km 29.300, C. P. 10, 00015 Monterotondo St. RM , Italy This paper reports the results of the treatment of a yarn dyeing effluent using an integrated biological chemical oxidation process. In particular, the biological unit was based on a sequencing batch biofilter granular sludge reactor SBBGR , while the chemical treatment consisted of an ozonation step. Biological treatment alone was first performed as a reference for comparison. While biological treatment did not produce an effluent for direct discharge, the integrated process assured good treatment results, with satisfactory removal of chemical oxygen demand up to 89.8 % , total nitrogen up to 88.2 % , surfactants up to 90.7 % and colour up to 99 % , with an ozone dose of 110 mg of ozone per litre of wastewater. Biomass characterization by fluorescence in situ hybridization has revealed that filamentous bacteria represented about 20 % of biomass coherently with high sludge volume index values ; thanks to its special design, SBBGR guaranteed, however, stable treatment performances and low effluent suspended solids concentrations, while conventional activated sludge systems suffer from sludge bulking and even treatment failure in such a condition. Furthermore, biomass characterization has evidenced the presence of a shortcut nitrification denitrification process. © 2013 Islamic Azad University IAU . 11 http //www.scopus.com/inward/record.url eid=2 s2.0 84900372612 partnerID=q2rCbXpz articolo 10_1007_s13762_013_0271_7.pdf Articolo in rivista Iranian Society of Environmentalists, Center for Environment and Energy Research and Studies 1735 1472 International journal of environmental science and technology Tehran International journal of environmental science and technology Tehran Int. j. environ. sci. technol. Tehran International journal of environmental science and technology. Tehran International Journal of Environmental Science Technology Tehran simona.rossetti ROSSETTI SIMONA claudio.diiaconi DI IACONI CLAUDIO antonio.lopez LOPEZ ANTONIO marco.desanctis DE SANCTIS MARCO TA.P07.002.003 Integrazione di processi chimici e biologici |
