Treatment of dairy effluents by electrocoagulation using aluminium electrodes
| Autor: | Emmanuel Ngameni, Charles Péguy Nanseu-Njiki, André Darchen, Dimitre Hadjiev, Serge Raoul Tchamango |
|---|---|
| Přispěvatelé: | Laboratoire de Chimie Analytique, Faculté des Sciences (LCA/FS), Université de Yaoundé I, Laboratoire de Biotechnologie et Chimie Marines (LBCM), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
MESH: Hydrogen-Ion Concentration
medicine.medical_treatment MESH: Dairying MESH: Electrocoagulation 02 engineering and technology 010501 environmental sciences 01 natural sciences Waste Disposal Fluid Electrocoagulation chemistry.chemical_compound Aluminium anode Aluminium MESH: Animals Turbidity Waste Management and Disposal Chemical oxygen demand MESH: Aluminum Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Pulp and paper industry Pollution 6. Clean water Dairying MESH: Cattle MESH: Water Pollutants Chemical Wastewater MESH: Conservation of Natural Resources Alum Compounds Female MESH: Alum Compounds 0210 nano-technology Dairy effluents Conservation of Natural Resources Environmental Engineering chemistry.chemical_element Industrial Waste Aluminium sulfate medicine Environmental Chemistry Animals MESH: Industrial Waste Effluent Electrodes 0105 earth and related environmental sciences Chemical coagulation Environmental engineering MESH: Electrodes [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology chemistry Cattle MESH: Waste Disposal Fluid MESH: Female Water Pollutants Chemical Waste disposal Aluminum |
| Zdroj: | Science of the Total Environment Science of the Total Environment, Elsevier, 2010, 408 (4), pp.947-52. ⟨10.1016/j.scitotenv.2009.10.026⟩ Science of the Total Environment, 2010, 408 (4), pp.947-52. ⟨10.1016/j.scitotenv.2009.10.026⟩ |
| ISSN: | 0048-9697 1879-1026 |
| DOI: | 10.1016/j.scitotenv.2009.10.026⟩ |
| Popis: | International audience; This work sets out to examine the efficiency of an electrolytic treatment: electrocoagulation, applied to dairy effluents. The experiments were carried out using a soluble aluminium anode on artificial wastewater derived from solutions of milk powder. The flocks generated during this treatment were separated by filtration. The analysis of the filtrates showed that the chemical oxygen demand (COD) was reduced by up to 61% while the removal of phosphorus, nitrogen contents, and turbidity were 89, 81 and 100%, respectively. An analogous treatment applied to phosphate and lactose solutions revealed that lactose was not eliminated, a fact that could account for the rather poor lowering of the COD. Compared to the chemical coagulation treatment with aluminium sulphate, the efficiency of the electrocoagulation technique was almost identical. However the wastewaters treated by electrocoagulation differed by the fact that they exhibited a lower conductivity and a neutral pH value (by contrast to the acid nature of the solution treated by the chemical coagulation). This result (low conductivity, neutral pH) tends to show that it may be possible to recycle the treated water for some industrial uses. Moreover, the electrocoagulation process uses fewer reagents: the mass of the aluminium anode dissolved during the treatment is lower compared to the quantity of the aluminium salt used in chemical coagulation. These two observations clearly show that the electrocoagulation technique is more performing. |
| Databáze: | OpenAIRE |
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