A potential application of sludge-based catalysts for the anaerobic bio-decolorization of tartrazine dye.

Athalathil, Sunil; Fortuny, Agusti; Font, Josep; Stüber, Frank; Bengoa, Christophe; Fabregat, Azael (2015). A potential application of sludge-based catalysts for the anaerobic bio-decolorization of tartrazine dye. Environmental technology, 36(20), pp. 2568-2576. Taylor & Francis 10.1080/09593330.2015.1037361

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Two highly efficient (K2CO3/sludge carbon and ZnCl2/sludge carbon) solids were prepared by chemical addition following carbonization at 800 °C and were tested for anaerobic reduction of tartrazine dye in a continuous upflow packed-bed biological reactor, and their performance was compared to that of commercial activated carbon (CAC). The chemical and structural information of the solids was subjected to various characterizations in order to understand the mechanism for anaerobic decolorization, and efficiency for SBCZN800 and SBCPC800 materials was 87% and 74%, respectively, at a short space time (τ) of 2.0 min. A first-order kinetic model fitted the experimental points and kinetic constants of 0.40, 0.92 and 1.46 min(-1) were obtained for SBCZN800, SBCPC800 and CAC, respectively. The experimental results revealed that performance of solids in the anaerobic reduction of tartrazine dye can depend on several factors including chemical agents, carbonization, microbial population, chemical groups and surface chemistry. The Langmuir and Freundlich models are successfully described in the batch adsorption data. Based on these observations, a cost-effective sludge-based catalyst can be produced from harmful sewage sludge for the treatment of industrial effluents.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Intensive Care, Emergency Medicine and Anaesthesiology (DINA) > Clinic and Policlinic for Anaesthesiology and Pain Therapy

UniBE Contributor:

Stüber, Frank


600 Technology > 610 Medicine & health




Taylor & Francis




Jeannie Wurz

Date Deposited:

23 Jun 2015 08:20

Last Modified:

23 Jan 2018 12:14

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

bio-decolorization; carbonization; sewage sludge; tartrazine; wastewaters



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