Applicability of nanofiltration and reverse osmosis for the treatment of wastewater of different origin

• Autorzy: Edit Cséfalvay , Péter Imre , Péter Mizsey
• Języki publikacji: EN

Abstrakty

EN

Membrane separations are finding greater use in wastewater treatment because of their efficiency. In order to prove the effectiveness of membrane filtration an applicability study is carried out. Nanofiltration and reverse osmosis membranes are tested under quite different conditions to reduce the chemical oxygen demands (COD) of wastewaters to meet the Council Directive 76/464/EEC release limit. Two kinds of real wastewaters were selected for the investigation. The wastewaters represent extreme different circumstances since the difference between their COD is two orders of magnitude. All of the membranes tested can be applied either to the treatment of wastewater of high COD (pharmaceutical wastewater) or wastewater of low COD (dumpsite leachate), since the different conditions do not change the membrane characteristics. The experimental data show that none of the membranes can decrease the COD to the release limit in one step. However, if two-stage filtrations (nanofiltration followed by reverse osmosis) are accomplished for both of the wastewaters, a total COD reduction of 94% can be achieved. With the application of the two-stage filtration the COD of the wastewater of low COD can be decreased below the release limit but in case of wastewater of the high COD further treatment will be required. [...]

Słowa kluczowe

EN

Membrane filtration; Pharmaceutical wastewater; Dumpsite leachate; Chemical oxygen demand; Nanofiltration; Reverse osmosis

• Czasopismo: Open Chemistry
• Rocznik: 2008
• Tom: 6
• Numer: 2
• Strony: 277-283

Daty

wydano

2008-06-01

online

2008-04-17

Twórcy

autor

Edit Cséfalvay

• Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, 1521 Budapest, Pf. 91, Hungary,

autor

Péter Imre

• Gedeon Richter Nyrt. H-1475, Budapest, 10 Pf. 27, Hungary

autor

Péter Mizsey

• Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, 1521 Budapest, Pf. 91, Hungary

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Identyfikatory

DOI

10.2478/s11532-008-0026-3