Nanofiltration of cork wastewaters and their possible use in leather industry as tanning agents

• Autorzy: Geraldes V , Minhalma M , De Pinho M N , Anil A , Ozgunay H , Bitlisli B O , Sari O
• Języki publikacji: EN

Abstrakty

EN

Cork processing wastewater is a very complex mixture of vegetal extracts and has, among other natural compounds, a very high content of phenolic/tannic colloidal matter that is responsible for severe environmental problems. In the present work, the concentration of this wastewater by nanofiltration was investigated with the aim of producing a cork tannin concentrate to be utilized in tanning. Permeation results showed that the permeate fluxes are controlled by both osmotic pressure and fouling/gel layer phenomena, leading to a rapid decrease of permeate fluxes with the concentration factor. The rejection coefficients to organic matter were higher than 95%, indicating that nanofiltration has a very good ability to concentrate the tannins and produce a permeate stream depleted from organic matter. The cork tannin concentrate obtained by nanofiltration and evaporation had total solids concentration of 34.8 g/l. The skins tanned by this concentrate were effectively converted to leather with a shrinking temperature of 71℃ .

Słowa kluczowe

EN

nanofiltration; cork waste water; tannin; tanning; leather industry; leather waste water; membrane module

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2009
• Tom: 18
• Numer: 3
• Opis fizyczny: p.353-357,fig.,ref.

Twórcy

autor

Geraldes V

• Department of Chemical and Biological Engineering, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal

autor

Minhalma M

• Department of Chemical Engineering, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emídio Navarro 1, 1959-007 Lisbon, Portugal

autor

De Pinho M N

• Department of Chemical and Biological Engineering, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal

autor

Anil A

• Leather Engineering Department, Engineering Faculty, Ege University, 35100 Izmir, Turkey

autor

Ozgunay H

• Leather Engineering Department, Engineering Faculty, Ege University, 35100 Izmir, Turkey

autor

Bitlisli B O

• Leather Engineering Department, Engineering Faculty, Ege University, 35100 Izmir, Turkey

autor

Sari O

• Leather Engineering Department, Engineering Faculty, Ege University, 35100 Izmir, Turkey

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