Removal of metal and organic pollutants from wastewater by a sequential selective technique. (August 2016)

• Record Type: Journal Article
• Authors: Cobas, M.; Danko, A.S.; Pazos, M.; Sanromán, M.A.
• Is Part Of: Bioresource technology. Volume 213(2016)
• Page Start: 2
• Page End: 10
• Publication Date: 2016-08
• Subjects: Biosorption-biodegradation -- Chromium -- Chestnut shells -- m-Cresol -- Phlebia radiata; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.02.036
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Sequential selective strategy is proposed to removal of metal and organic pollutants. Chestnut shell has a dual benefit as an adsorbent and enzymatic inductor. Complete Cr(VI) biosorption followed pseudo-second order kinetic and Langmuir isotherm. High laccase production and m -cresol biodegradation rate in Rotating drum bioreactor. Sequential system proposed has been modelled operating in continuous mode. Abstract: In this study the application of a sequential selective system that combined biosorption with biodegradation was evaluated as a feasible process for the removal of Cr(VI) and m -cresol from effluents. Cr(VI) biosorption on pretreated chestnut shells showed 100% metal removal and modelling efforts demonstrated that the pseudo-second order kinetic model and Langmuir isotherm fit well the process behaviour. Thus, the treated stream was an appropriate environment for the biodegradation of m -cresol using a laccase-producer fungus, Phlebia radiata . Two bioreactor configurations, rotating drum and modified-airlift, were studied using the fungus grown on chestnut shells, which act as support-substrate as well as oxidative enzyme inductor increasing the laccase activity up to 1000 U L −1 . The best bioreactor, rotating drum, reached 100% removal in 7 days. Finally, the best configuration for the sequential selective system was modelled operating in continuous mode by the breakthrough curves generated using FASTv2.0 and the design bioreactor flow model.