Traitabilité des rejets liquides de l'industrie textile

Abstract : The cost of environmental degradation in Morocco represents 20 milliards of dirhams, i.e. 8.2% of GNP. 14.5 milliards of dirhams are related to water and solid waste. This situation is worsening, due to the direct discharge in the environment of industrial wastewater which represents an important organic and toxic pollution. ln this framework of environmental protection, we have studied the treatability of textile industry wastewater. ln a first stage, a physico-chemical.characterization has been performed, focused on colour, toxicity (evaluated by respirometric tests) and on the effect of wastewater variability on the operation and stability of a biological treatment system by activated sludge. ln a second stage, treatability tests by coagulation, electrocoagulation and photocatalysis have been performed in order to decrease the colour and to increase the biodegradability. Finally the pre-treatment has been coupled to a biotreatment in a sequencing batch reactor to evaluate the performance with respect to discharge norms. Keeping in mind the sustainability of the global project, the discussion takes into account the consumption in energy and reagents and the robustness of the process with respect to the wastewater variability. This work is aiming at the selection of techniques that will be later included in a decision-making tool for the choice of the best available technology for textile wastewater treatment with a possible re-use of the treated water on the industrial site.
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Asma Alinsafi. Traitabilité des rejets liquides de l'industrie textile. Sciences agricoles. Institut National Polytechnique de Lorraine, 2005. Français. ⟨NNT : 2005INPL006N⟩. ⟨tel-01749972⟩



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