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The wastewater, rich in carbohydrates fromstarch hydrolysis, presents a promising feedstock for hydrogen peroxide (H2O2) production, a crucial componentin cotton fabric bleaching. this study, comprehensively characterized various cotton processing wastewater,evaluating their total sugar content and carbohydrate profile. Based on the results, wastewater from the pre-washer emerged as the most suitable for enzymatic H2O2 production. Given the variability in carbohydrateprofile of wastewater, two strategies based on the carbohydrate oxidase promiscuity were developed: N-ace-tylglucosamine oxidase (NagOx), specific for glucose, and Cellobiose oxidase (COX), displaying a high carbo-hydrate promiscuity. A pretreatment with glucoamylases was employed to increase glucose levels for NagOX,while COX was directly applied towards untreated wastewater. pH control was assessed for both systems. Resultsindicated NagOX’s performance was enhanced by pH control, unlike COX. The robustness and flexibility of bothproposed strategies were validated using diverse batches industrial wastewaters samples, confirming the efficacyof the proposed enzymatic-based hydrogen peroxide production processes. Biobleaching tests were conducted,revealing an impact of wastewater color on the bleaching process. However, the use of a hydrogen peroxideactivator (TAED) emerged as a promising approach to implement the proposed strategies."],"publicationDate":"2025-04-01","publisher":"Elsevier BV","embargoEndDate":null,"sources":["Crossref","Journal of Environmental Chemical Engineering"],"formats":null,"contributors":null,"coverages":null,"bestAccessRight":{"code":"c_abf2","label":"OPEN","scheme":"http://vocabularies.coar-repositories.org/documentation/access_rights/"},"container":{"name":"Journal of Environmental Chemical 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