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Extracellular polymeric substances as paper coating biomaterials derived from anaerobic granular sludge

Environmental Science and Ecotechnology 2024年第5期21卷 178-186页

作者： cuijie feng.lorenzo bonetti Hui Lu Zhongbo Zhou Tommaso Lotti Mingsheng Jia Giacomo Rizzardi Luigi De Nardo Francesca Malpei Department of Civil and Environmental Engineering Politecnico di MilanoPiazza Leonardo da Vinci3220133MilanItaly School of Civil Engineering Sun Yat-sen University519082ZhuhaiChina Department of Chemistry Materials and Chemical Engineering“G.Natta”Politecnico di MilanoVia Mancinelli720131MilanItaly School of Environmental Science and Engineering Sun Yat-sen University510275GuangzhouChina Southwest University College of Resources and EnvironmentTiansheng Road 2Beibei District400716ChongqingChina Civil and Environmental Engineering Department University of FlorenceVia di Santa Marta 350139FlorenceItaly Center for Microbial Ecological and Technology(CMET) Ghent UniversityCoupure Links 653GentBelgium

Recovering extracellular polymeric substances(EPS)from waste granular sludge offers a cost-effective and sustainable approach for transforming wastewater resources into industrially valuable ***,the application potential of these EPS in real-world scenarios,particularly in paper manufacturing,remains *** we show the feasibility of EPS-based biomaterials,derived from anaerobic granular sludges,as novel coating agents in paper *** systematically characterised the rheological properties of various EPS-based *** applied as surface sizing agents,these EPS-based biomaterials formed a distinct,ultra-thin layer on paper,as evidenced by scanning electron microscopy.A comprehensive evaluation of water and oil penetration,along with barrier properties,revealed that EPS-enhanced coatings markedly diminished water absorption while significantly bolstering oil and grease *** performance was observed in EPS variants with elevated protein and hydrophobic contents,correlating with their superior rheological *** enhanced water-barrier and grease resistance of EPS-coated paper can be attributed to its non-porous,fine surface structure and the functional groups in EPS,particularly the high protein content and hydrophobic humic-like *** research marks the first demonstration of utilizing EPS from anaerobic granular sludge as paper-coating biomaterials,bridging a critical knowledge gap in the sustainable use of biopolymers in industrial applications.

关键词： Anaerobic granular sludge Extracellular polymeric substances(EPS) Resource recovery Paper coating

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