Description: The proposal objective is to develop a new technology for wastewater streams containing toxic metal ions in concentrations up to 500 mg/l. The process combines high selective metal bonding agents with further separation, recovery and recycling by new pressure membrane (MF/UF) modules, metal concentration deeper than 50 mg/l, or novel hybrid flotation/submerged membrane (MF/UF) modules, metal concentration 50-500 mg/l. Scientific objectives and approach: The main scientific and technological objectives of the project are: - development of highly selective bonding agents with very fast reaction kinetics for bonding the toxic metals and their oxyanions. This will lead to a better use of the capacity of the bonding agents resulting in smaller units and low residual concentration of toxic metals in the treated water streams to comply with individual standards for water re-use (or discharge); - development/modification of MF/UF hollow fibre or flat-sheet-multichannel polymer membranes with an active layer outside the fibres for operation in low and high BA concentration ranges. The membranes will have lower membrane fouling tendency and higher membrane fluxes; - development of membrane modules (pressure-driven and submerged) with polymer hollow fibre or flat-sheet-multichannel membranes and ceramic flat-sheet multichannel (or tubular) membranes for operation in low and high BA concentration ranges with higher water yield; - optimisation of the membrane modules with respect to the interaction with BA/metal complexes. Mathematical modeling and numerical simulation of the transport flow in the membrane modules developed will be included; - development of a combined process of flotation and membrane separation for higher contaminated wastewater, including a hybrid process; - optimisation of the regeneration and recovery of the BAs by electrodialysis with bipolar membranes (EDBM), pH adjustment etc. High concentration of specific metals in the regenerant solution will be achieved and metal re-use will be less complicated; - lab and bench-scale investigations into the selective separation of toxic metals from specially selected process water streams based on end users' requirements involving optimisation of water pretreatment as well as recovery and recycling of bonding agents. A technological and economic evaluation of the alternatives will be performed. ... . Prime Contractor: Gesellschaft für umweltkompatible Prozesstechnik an der Universität des Saarlandes; Saarbrücken; Germany.
SupportProgram
Origins: /Bund/UBA/UFORDAT
Tags: Metallrecycling ? Rohstoffrückgewinnung ? Recycling ? Schwermetallgehalt ? Wasserwiederverwendung ? Keramik ? Schadstoffgehalt ? Blei ? Polymer ? Flusswasser ? Bindemittel ? Deutschland ? Metall ? Abwasserverwertung ? Anlagenoptimierung ? Betriebswasser ? Industrieabwasser ? Biofouling ? pH-Wert ? Abwasser ? Rohstoff ? Simulation ? Trennverfahren ? Verfahrenstechnik ? Dekontamination ? Wirtschaftlichkeit ? Flotation ? Mathematisches Modell ? Modellierung ? Ökonomische Bewertung ? Niedrigwasser ? Rückstand ? Verkehrsfluss ? Membran ? Modul ? Regeneration ? Wiederfindungsrate ? Alternativtechnologie ?
Region: Saarland
Bounding boxes: 6.96083° .. 6.96083° x 49.40472° .. 49.40472°
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2001-03-01 - 2004-02-29
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