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Contenido archivado el 2022-12-23

Purification and Recycling of Wastewater by Solar-Catalytic and Biological Treatment in Algeria, Syria and Tunisia

Objetivo

- To examine and optimise, under real conditions, the solar catalytic treatment of waste water (municipal, textile industry) in order to reach a water quality as high as possible (drinking water);
- To assess, for cases where sufficient high water quality standards cannot be realised, other possibilities for re-using lower quality water.
Expected Outcome

- The feasibility to treat wastewaters with thin film solar reactors in combination with newly developed catalysts in order to reach drinking water quality, or at least enable a re-use for irrigation or other purposes, will be assessed. The specific condition in the Mediterranean region will be taken into account as well as technological, economic and environmental parameters of the processes;
- Scientific technical achievements will include the construction and optimisation of the thin film reactors and of novel catalysts.



Results

- The solar plants have been successfully installed and operated in Algeria, Syria and Tunisia, and the biological treatment of municipal and textile wastewater has been optimised. Studies on the hydrodynamics of the Thin Film Fixed Bed Reactor (TFFBR) and on the relation between the hydrodynamics and the reaction rate velocity lead to improve degradation rates of model and real wastewater under artificial as well as under solar illumination. A biological pre-treatment improves the overall performance of the system, as only non-biodegradable components are treated photocatalytically. A reduction of indicator bacteria such as E. coli and streptococcus faecalis by solar light has been detected. A new fixation technology by heating-sprinkling simplifies the production of long-life catalyst panes for the TFFBR. Novel catalysts and commercially available titanium dioxides have been tested with textile wastewater under solar conditions.
- The improvement of the TFFBR leads to a technology that is close to a transfer into a technical scale and which will be competitive to other wastewater treatment techniques in the near future.
- Adaptation of existing biological treatment plants at ITV and INRST for the purposes of this project;
- Optimisation of biological treatment for textile industry effluents;
- Production of biologically pre-treated waste water for the experiments with solar-catalytic plants;
- Construction of 4 solar Thin Film Reactors (TN, AL, SY, DE);
- Evaluation of the theoretical performance of these reactors in terms of water quality and economic feasibility and verifying these findings in small scale experiments using either biologically pre-treated waste water or crude waste water;
- Assessment of the necessity of a biological pre-treatment;
- Optimisation of operating conditions and catalysts for biological pre-treated waste waters and for original waste water;
- Catalyst optimisation and fixation including verification of environmental impact of the processes;
- Techno-economic assessment of the designed processes.

Tema(s)

Data not available

Convocatoria de propuestas

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Régimen de financiación

CSC - Cost-sharing contracts

Coordinador

TECHNICAL UNIVERSITY OF CLAUSTHAL
Aportación de la UE
Sin datos
Dirección
Leibniz Strasse 15
38678 Clausthal - Zellerfeld
Alemania

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Coste total
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Participantes (4)