Treatment of dairy industry wastewater by EC and EF processes using hybrid FeAl plate electrodes
| Autor: | Ülker Bakır Öğütveren, Eren Öcal, Ali Savaş Koparal, Yusuf Yavuz |
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| Přispěvatelé: | Anadolu Üniversitesi, Koparal, Ali Savaş, Öğütveren, Ülker Bakır |
| Rok vydání: | 2011 |
| Předmět: |
Biochemical oxygen demand
Supporting electrolyte General Chemical Engineering law.invention Inorganic Chemistry chemistry.chemical_compound law Sodium sulfate Iron-Aluminum Electrodes Electrocoagulation Organic matter Waste Management and Disposal Effluent chemistry.chemical_classification Electrolysis Renewable Energy Sustainability and the Environment Organic Chemistry Chemical oxygen demand Environmental engineering Electrofenton Pulp and paper industry Pollution Fuel Technology chemistry Wastewater Dairy Wastewater Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 86:964-969 |
| ISSN: | 0268-2575 |
| DOI: | 10.1002/jctb.2607 |
| Popis: | WOS: 000291616800010 BACKGROUND: In this study electrochemical treatment of dairy industry wastewater (DW) was investigated using a combined electrode system consisting of iron and aluminum as sacrificial electrodes. The dairy industry generates strong wastewaters characterized by high biological oxygen demand and chemical oxygen demand concentrations. Dairy industry waste effluents are concentrated in nature, and the main contributors of organic load to these effluents are carbohydrates, proteins and fats originating from the milk. Since dairy waste streams contain high concentrations of organic matter, these effluents may cause serious environmental problems. RESULTS: A pole changer device was employed to change polarization in given time intervals to generate iron and aluminum based coagulants respectively. The effects of current density, initial pH, sodium sulfate (Na(2)SO(4)) and H(2)O(2) concentrations on the removal efficiency were investigated. The best experimental conditions obtained in electrochemical studies were as follows: current density = 15 mA cm(-2), natural pH, without supporting electrolyte addition, H(2)O(2) concentration = 3 x 1000 mg L(-1). Under these conditions, 79.2% COD removal from DW was achieved. CONCLUSION: According to the results, 20 min electrolysis is enough, since insignificant variations in COD removal were observed after this time. These methods were found to be successful for the treatment of DW Anadolu University [04.02.39] This study was supported by Anadolu University Research Fund with Grant no: 04.02.39. |
| Databáze: | OpenAIRE |
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