Multivariate and multiobjective optimization of tannery industry effluent treatment using Musa sp flower extract in the coagulation and flocculation process
| Autor: | Carla Cristina Almeida Loures, Gisella Rossana Lamas Samanamud, Maria Bernadete Pinto, Eduardo Prado Baston, Luzia Lima Rezende Naves, Fabiano Luiz Naves, Alexandre Boscaro França |
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| Rok vydání: | 2019 |
| Předmět: |
Biochemical oxygen demand
Flocculation Central composite design Renewable Energy Sustainability and the Environment 020209 energy Strategy and Management 05 social sciences Chemical oxygen demand chemistry.chemical_element 02 engineering and technology Pulp and paper industry Industrial and Manufacturing Engineering Chromium chemistry.chemical_compound chemistry 050501 criminology 0202 electrical engineering electronic engineering information engineering Hexavalent chromium Turbidity Effluent 0505 law General Environmental Science |
| Zdroj: | Journal of Cleaner Production. 219:655-666 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2019.02.060 |
| Popis: | Several studies have focused in the tannery industry due to the high polluting potential of the effluent generated in leather processing; high concentrations of total chromium and organic load. However, the high costs attributed to the treatment of tanning residues explains why this material is not treated within the tannery industry. The extract from the flower of Musa sp, condensed and hydrolisable tanins, yet to be explored in literature was applied to remove organic matter from chemically enhanced primary treatment (CEPT) of total solids, turbidity and total chromium from a tanning industry and leather processing. The use of the flower extract of Musa sp. proposed in this study does not require flocculant polymers after the coagulation step. A central composite design response surface (CCD) was modelled by the factors: coagulant volume, pH and rotation. The optimization was performed according to the NBI algorithm in a mixed arrangement to determine optimal weights. The modeling from CCD and minimization of Global Standard Error determines the optimized conditions, turbidity removal, total cromium, hexavalent chromium and trivalente chromium of 78% and 65.4%, 39.43% and 61.02%, respectively, increasing the biodegradability from the ratio biochemical oxygen demand (COD) and chemical oxygen demand (COD) of 0.12–0.63. |
| Databáze: | OpenAIRE |
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