Brine recovery from hypersaline wastewaters from table olive processing by combination of biological treatment and membrane technologies. (20th January 2017)

• Record Type: Journal Article
• Authors: Ferrer-Polonio, E.; Carbonell-Alcaina, C.; Mendoza-Roca, J.A.; Iborra-Clar, A.; Álvarez-Blanco, S.; Bes-Piá, A.; Pastor-Alcañiz, L.
• Is Part Of: Journal of cleaner production. Volume 142:Part 4(2017)
• Page Start: 1377
• Page End: 1386
• Publication Date: 2017-01-20
• Subjects: Hipersaline effluents -- Phenolic compounds -- Biological treatment -- Ultrafiltration -- Nanofiltration; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2016.11.169
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The fermentation brines from table olive processing (FTOP) are hypersaline effluents (conductivities higher than 75 mS cm −1 ) with high organic matter concentrations (COD around 10 g L −1 ), which also include phenolic compounds (between 700 and 1500 mg TY·L −1 ). In this work, an integrated process for the FTOP reuse as brine in the table olive processing has been evaluated. This integrated process consisted of a biological treatment followed by a membrane system, which included ultrafiltration (UF) plus nanofiltration (NF). The biological treatment was carried out by 6 L laboratory sequencing batch reactor (SBR). UF and NF were performed in laboratory plants for flat membranes of 0.0125 and 0.0072 m 2, respectively. Each stream generated during the FTOP treatment (SBR effluent, and UF and NF permeates) were evaluated. The SBR eliminated around 80% of COD and 71% of total phenols concentration. In the final NF permeate the COD concentration was lower than 125 mg L −1 ; while the turbidity, colour and phenolic compounds, were completely removed. Graphical abstract: Highlights: Biological process plus membranes were used for hypersaline wastewater treatment. Around 80% of the organic matter was eliminated in the biodegradable treatment. Ultrafiltration plus nanofiltration removed colour, turbidity and phenols compounds. After membrane treatment COD was reduced by 98%, meanwhile salinity was conserved. The regenerated brine is available for its reuse as a new fermentation process.