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Utilization of plant-derived wastes as the potential biohydrogen source: a sustainable strategy for waste management

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Abstract

The sustainable economy has shown a renewed interest in acquiring access to the resources required to promote innovative practices that favor recycling and the reuse of existing, unconsidered things over newly produced ones. The production of biohydrogen through dark anaerobic fermentation of organic wastes is one of the intriguing possibilities for replacing fossil-based fuels through the circular economy. At present, plant-derived waste from the agro-based industry is the main global concern. When these wastes are improperly disposed of in landfills, they become the habitat for several pathogens. Additionally, it contaminates surface water as a result of runoff, and the leachate that is created from the waste enters groundwater and degrades its quality. However, cellulose and hemicellulose-rich plant wastes from agriculture fields and agro-based industries have been employed as the most efficient feedstock since carbohydrates are the primary substrate for the synthesis of biohydrogen. To produce biohydrogen from plant-derived wastes on a large scale, it is necessary to explore comprehensive knowledge of lab-scale parameters and pretreatment strategies. This paper summarizes the problems associated with the improper management of plant-derived wastes and discusses the recent developments in dark fermentation and substrate pretreatment techniques with the goal of gaining significant insight into the biohydrogen production process. It also highlights the utilization of anaerobic digestate, which is left over after biohydrogen gas as feedstock for the development of value-added products such as volatile fatty acids (VFA), biochar, and biofertilizer.

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Albert Mariathankam Nizzy, Suruli Kannan, and Sellappa Kanmani contributed to the study’s conception and design. Data collection and manuscript preparation were performed by Albert Mariathankam Nizzy.

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Correspondence to Albert Mariathankam Nizzy.

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Nizzy, A.M., Kannan, S. & Kanmani, S. Utilization of plant-derived wastes as the potential biohydrogen source: a sustainable strategy for waste management. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33610-5

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