Enzymatic decolorization of melanoidins from molasses wastewater by immobilized keratinase.
Conjugate system
Decolorization yield
Immobilized keratinase
Melanoidins
Molasses wastewater
Journal
Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523
Informations de publication
Date de publication:
May 2019
May 2019
Historique:
received:
13
12
2018
revised:
07
02
2019
accepted:
08
02
2019
pubmed:
17
2
2019
medline:
24
8
2019
entrez:
17
2
2019
Statut:
ppublish
Résumé
The aim of this work was to study the ability of commercial immobilized hydrolases in the decolorization of molasses wastewater. Commercial immobilized keratinase obtained the highest decolorization yield (86.6-91.1%) among all of commercial immobilized enzymes tested. Immobilized keratinase had the potential to replace immobilized oxidoreductase to decolorize molasses wastewater. Keratinase from Meiothermus taiwanensis WR-220 (KMT) immobilized on modified bagasse cellulose obtained a decolorization yield of 84.7-90.2%. It removed 60.2-65.6% of colorants and 61.4-69.8% of chemical oxygen demand (COD) for 5 days continuously. Notably, the treatment cost was less than 0.15 dollar per ton. Immobilized KMT-wt had similar performance with commercial immobilized keratinase in bleaching molasses wastewater. Importantly, it was more economic. Finally, the results confirmed that additional reaction catalyzing the unsaturated bonds to destroy the conjugated system by keratinase, weakening the chromogenic group of melanoidins. Accordingly, this work is meaningful to the industrial decolorization of molasses wastewater.
Identifiants
pubmed: 30771571
pii: S0960-8524(19)30249-4
doi: 10.1016/j.biortech.2019.02.049
pii:
doi:
Substances chimiques
Enzymes, Immobilized
0
Polymers
0
Waste Water
0
melanoidin polymers
0
Peptide Hydrolases
EC 3.4.-
keratinase
EC 3.4.-
Types de publication
Journal Article
Langues
eng
Pagination
165-172Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.