A circular economy process has been developed to convert polyurethane waste into biofertilizing microorganisms through a sequential chemical/biological process. The chemical phase involves the complete depolymerization of polyurethane using ozone attack, generating an aqueous extract (OLE) composed of small, bioavailable molecules such as polyols, isocyanate derivatives, and carboxylic acids. The biological phase utilizes OLE for the generation of biomass with biofertilizing functional activity through Rhodococcus pyridinivorans fermentation. The metabolic-proteomic expression during the biodegradation of OLE involves the synthesis of numerous enzymes such as cutinases, hydrolases, proteases, esterases and oxidoreductases, which participate in the degradation of chemical compounds like benzene derivatives, phenols, or plastic polymers. OLE has been converted into microorganisms with biofertilizing properties, including nitrogen fixation, phytohormone production and siderophores. This process contributes to sustainability by diverting polyurethane waste from landfills, reducing the environmental impact of chemical fertilizers and promoting a more sustainable agricultural system.

中文翻译：

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聚氨酯废物估价：使用臭氧化和吡啶红球菌发酵进行生物肥料生产的两阶段工艺


已经开发了一种循环经济工艺，通过连续的化学/生物过程将聚氨酯废物转化为生物肥化微生物。化学相涉及利用臭氧侵蚀对聚氨酯进行完全解聚，生成由生物可利用的小分子（如多元醇、异氰酸酯衍生物和羧酸）组成的水性提取物 （OLE）。生物相利用 OLE 通过吡啶红球菌发酵产生具有生物施肥功能活性的生物质。OLE 生物降解过程中的代谢-蛋白质组学表达涉及许多酶的合成，例如角质酶、水解酶、蛋白酶、酯酶和氧化还原酶，这些酶参与苯衍生物、酚类或塑料聚合物等化合物的降解。OLE 已转化为具有生物施肥特性的微生物，包括固氮、植物激素产生和铁载体。该工艺通过从垃圾填埋场转移聚氨酯废物、减少化肥对环境的影响和促进更可持续的农业系统，为可持续发展做出贡献。