Facile approach for nanoconfinement of multilayer graphene oxide with polyether polyurethane sponge as biological carrier for the establishment of microalgal-bacterial bioreactor. (June 2023)

• Record Type: Journal Article
• Authors: Chao, Zhu; Jingru, Xu; Ahmad, Momina; Khan, Bushra Zia; Yongyong, Hao; Hongrui, Ma; Mahmood, Zarak
• Is Part Of: Bioresource technology. Volume 378(2023)
• Publication Date: 2023-06
• Subjects: Graphene oxide -- Polyether polyurethane sponge -- Algal-bacterial reactor -- Tylosin removal; 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.2023.128997
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A facile approach for nano-confinement of PP sponge with multilayer GO. Improved interfacial interaction of GO and PP promoting bio-compatibility. Tailored GO-PP improved biofilm growth and carbon metabolism. Significant trace amount antibiotic removal (>85 %) over 20 cycles. Abstract: Physically precise and mechanically robust biocarrier is basic and urgent requirement of algal-bacterial wastewater treatment plants for homogenously biofilm growth. Herein, a highly efficient graphene oxide (GO) coordinated polyether polyurethane (PP) sponge was synthesized through GO incorporation into PP sponge to improve the GO coating, followed by UV-light treatment for industrial application. The resulted sponge showed remarkable physiochemical characteristics, excellent thermal (>0.02 Wm −1 K −1 ) and mechanical (>363.3 KPa) stability. To test the potential of sponge in real world scenarios, the activated sludge from real wastewater treatment plant was utilized. Interestingly, the GO-PP sponge enhanced the electron transfer between microorganisms and promoted the standardized microorganism's growth and biofilm formation (22.7 mg/d per gram sponge, 172.1 mg/g), providing the feasibility to accomplish a symbiotic system within specifically design upgraded algal-bacterial reactor. Furthermore, the continuous flow process by utilizing GO-PP sponge in algal-bacterial reactor demonstrated the effectiveness in treating low concentration antibiotic wastewater, presenting 86.7 % removal rate and >85 % after 20 cycles. Overall, this work illustrates an applicable strategy to develop a sophisticated modified pathway for the next-generation biological-based applications.