Description: Das Projekt "Development of economic concepts for concentrate utilisation when using membrane technology for process water/effluent treatment in paper mills" wird vom Umweltbundesamt gefördert und von Papiertechnische Stiftung München durchgeführt. The project aims at developing concepts for utilising and treating concentrates that meet environmental compatibility (meeting local and national environmental guidelines) and economical boundary conditions (limited budget of overall water treatment concept). In this context four different concentrate treatment steps are already checked or currently being checked: 1. biological treatment (aerobic and anaerobic conditions) - successfully completed, 2. ozonation (treating persistent COD compounds) - successfully completed, 3. actiflo (sand supported flocculation and flotation) - currently checked, 4. electro flotation - currently checked. Background / Problem area: Internal process water treatment is of major interest, as the loads of organic and inorganic compounds have a considerable impact on process stability and paper quality. To meet the requirements of different water consumers, membrane technology is a powerful alternative for process water treatment. However, since it is merely a separation process, it produces concentrates that have to be utilised or at worst disposed of. There is currently no application for treating or utilising accrued concentrates when using ultra filtration to obtain super clear filtrates or when using nano filtration for advanced effluent treatment. Promoting this promising membrane technology in the paper industry presupposes economically and ecologically meaningful concepts for concentrate utilisation. Objective / Research results: The project aims at developing concepts for utilising and treating concentrates that meet environmental compatibility and economical boundary conditions. Four different concentrate treatment steps have been checked: biological treatment (aerobic and anaerobic conditions) - ozonation (treating persistent COD compounds) - micro sand supported flocculation and precipitation -electro flotation. Additional process combinations based on two or three internal treatment steps have been checked. Based on the results, new ways of utilising the concentrates are considered. Different possibilities of concentrate treatment were investigated, but also options of the potentially reuse of pre-treated concentrates in the papermaking process. The results show that the micro sand supported clarification and the electro flotation is suited for reducing turbidity and the concentration of particulate matter (up to 90 percent). By electro flotation a decolouration of 50 percent was achieved however the specific costs are higher compared to the flocculation/precipitation costs. The ozonation should only be used after a biological stage. After these combined treatment steps decolouration o up to 90percentwas achieved and persistent COD was reduced as well. The concentrates could in most cases also be treated in an existing biological stage. To avoid concentration peaks in the contaminant loads, the feed of the concentrates to the biological stage should be preferable very consistent. usw.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: München ? Kabeljau ? Biopharmazeutikum ? Feinstaubwert ? Anaerobe Bedingungen ? Arsen ? Papierindustrie ? Ultrafiltration ? Nanofiltration ? Ozonung ? Futtermittel ? Abwasserbehandlung ? Papier ? Papierherstellung ? Anorganische Verbindung ? Verfahrenskombination ? Sand ? Aufbereitungstechnik ? Betriebswasser ? Flockung ? Mühle ? Umwelttechnik ? Wasseraufbereitung ? Biologische Behandlung ? Umweltleitlinien ? Flotation ? Membran ? Niederschlag ? Persistenz ? Standortbedingung ? Umweltverträglichkeit ? General aims ? Filtrat ? Water Membrane concentrate ? treatment processes ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2004-01-01 - 2005-12-31
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