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Hybrid membrane process for water treatment The goal of the project is to develop a novel, active and sustainable hybrid wastewater treatment process that removes simultaneously heavy metals, arsenic, nutrients and organic compounds from water streams. The process is based on membrane technology, photocatalysis and adsorption (separate and hybrid structures) and it has self-cleaning properties, long term stability and ability to recover nutrients. Need Companies are increasingly being forced both by regulatory and cost pressures to reduce the amount and environmental hazard of the waste they produce. One specific problem existing in the mining and metallurgical industries is the need for more efficient treatment technologies for the removal of metals and nutrients from wastewaters. Nutrients, such as nitrates, are also valuable compounds for example for fertilizer industry. In addition, the European Union has launched a thematic strategy on the sustainable use of natural resources with the aim to reduce the depletion and pollution of natural resources, such as water, in a growing economy. Therefore, there is a substantial need for innovative environmental technologies and clean, cost-effective, sustainable industrial processes to meet the global efforts on combating pollution. ALD-technique and other selected preparation techniques. 2) Selection, activation and testing of adsorption materials for separate removal of harmful compounds and for combined use in the membrane structure. 3) Design, modification, characterization and testing of coatings to meet the required surface properties in membrane structures. 4) Design, modification, characterization and testing of photocatalytic materials for the visible light region and for the use in catalytic membranes. Approach In this project a novel hybrid wastewater treatment process will be developed based on membrane technology, photocatalysis and adsorption as follows, 1) Design and development of reactive catalytic membranes with proper porous structure and activity by immobilization of photocatalysts and adsorption materials on the membrane surface, by Benefits The purification of wastewater will reduce the harm towards the environment by eliminating nutrient and heavy metal discharges, improve the resource efficiency of valuable compounds and promote water re-use reducing freshwater consumption. The conduction of this research helps industry to employ an eco-efficient and innovative hybrid process that removes water pollutants from effluents with The developed hybrid process will be applied for the separate and simultaneous removal of heavy metals, arsenic and nutrients from industrial wastewaters. In addition, the sustainability assessment of the developed new process will be conducted. high efficiency. Further, this study reinforces the co-operation between companies by converting wastes and side products from one enterprise into a valuable and recyclable raw material for another enterprise. Therefore, the recovery and reuse of such valuable compounds as well as the removal of pollutants from wastewaters improves the sustainability of many industrial processes. Companies that design water treatment facilities benefit from the results of this project by improving their competitiveness at national and international level due to the developed hybrid water treatment technology. Disadvantages of each separated process can be overcome and in that way sustainability and process efficiency can be improved. For example, one of the biggest challenges in membrane technology is membrane fouling which can be prevented by the development of self-cleaning membranes. Further, there is high a marketing potential due to the possibility to extend the markets to drinking water treatment. Competition The developed new hybrid process will compete with existing and often well establish wastewater treatments technologies such as oxidation/precipitation, ion exchange, electrodeposition, crystallization, evaporation and liquid-liquid extraction. However, these processes are often not efficient at diluted systems, they need high amounts of chemicals and often the pollution is not eliminated but transformed into another kind of pollution such as sludge. The hybrid process overcomes these limitations of the traditional techniques. End users • Water and wastewater treatment sector • Industry e.g. mining industry, paper and wood industry, chemical industry, metal industry –> Recovery of valuable materials, new products from waste Corvinus University of Budapest (CUB), Department of Food Engineering, Hungary Institute of Chemical Process Fundamentals of the Academy of Sciences of the Czech Republic (ICCP), v.v.i., Department of Catalysis and Reaction Engineering National University of Engineering, Universidad Nacional de Ingenería, (UNI) Lima, Peru, Science Faculty, Functional Materials Laboratory Companies Agnico-Eagle Finland Oy Aquator Oy Beneq Oy Envitop Oy Honkajoki Oy Kemira Oyj Miktech Oy Outokumpu Stainless Oyj Outotec Oyj Sachtleben Pigments Oy Talvivaaran Kaivososakeyhtiö Oyj Watman Engineering Ltd Oy More information Prof. Riitta Keiski, responsible leader of the project Mass and Heat Transfer Process Laboratory Department of Process and Environmental Engineering University of Oulu Tel. +358 40 726 3018, E-mail: [email protected] Prof. David Cameron ASTRaL –Research Laboratory Lappeenranta University of Technology Tel. +358 40 835 2649, E-mail: [email protected] Water Programme Project participants Research parties University of Oulu, Mass and Heat Transfer Process Laboratory Lappeenranta University of Technology ASTRaL – Research Laboratory Laboratory of Membrane Technologies Laboratory of Green Chemistry International research partners The Tekes Water Programme is aimed at modernising and internationalising the water sector. The programme is a response to sectoral changes and major growth in the global market. It seeks to promote networking among water sector players and to harness multi-sector competencies in order to generate new innovations, products and services. Funding provided by the programme totals about EUR 90 million, of which Tekes is contributing some EUR 40 million. The Water Programme is being implemented from 2008 to 2012. www.tekes.fi/programmes/Vesi/