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Updated: Nov 2, 2025

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
Current technologies for post-tanning wastewater treatment: A review
Éverton Hansen1, Patrice Monteiro de Aquim2, Mariliz Gutterres3
1Federal University of Rio Grande do Sul - UFRGS, Post-graduation Program of Chemical Engineering, Laboratory for Leather and Environmental Studies -LACOURO, Eng. Luiz Englert Street, Porto Alegre, RS, Brazil; Feevale University, Institute of Pure Sciences and Technology, 2755, RS 239, Novo Hamburgo, RS, Brazil; Centro Universitário Ritter dos Reis - UniRitter, 555 Orfanotrófio, Porto Alegre, RS, Brazil; Universidade do Vale do Rio dos Sinos, Chemical Engineering Department, 950 Av. Unisinos, São Leopoldo, RS, Brazil.
Abstract:
Leather post-tanning is responsible for producing effluents that are difficult to treat due to several recalcitrant pollutants. Dyes, tannins, and fatliquoring agents are mainly related to this characteristic. This study, as the state-of-the-art, attempts to systematically review treatment technologies applied in recent years to the post-tanning effluents. The Scopus database was used to identify articles related to post-tanning pollutants removal. Through the review, Advanced Oxidation Processes (AOPs) and adsorption proved to be good alternatives to increase the effluent biodegradability when applied before biological treatment. AOPs and adsorption were also efficient for the final polishing of the effluents, to reach the regulation standards for disposal, as well as enzymatic treatment. Furthermore, Membrane Separation Processes demonstrated good applicability when the reuse of the treated effluent is aimed.
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