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Аннотация

INTRODUCTION biogas production process. The quest for sustainable energy solutions and effective waste management strategies has led to a The co-digested solid fraction, which results from growing interest in biogas production from organic the combined digestion of different organic waste waste materials. Biogas, primarily composed of streams, offers several advantages as a feedstock methane and carbon dioxide, is a renewable energy for biogas plants. These solid fractions often source that can be generated through the anaerobic contain a diverse range of organic materials that digestion of organic substrates. Traditionally, can contribute to a more stable and productive biogas plants rely on single-type substrates such as digestion process. By optimizing the composition agricultural residues or municipal solid waste. of the feedstock, co-digestion can increase biogas However, recent advancements have highlighted yield, improve methane content, and enhance the potential benefits of co-digestion, a process process stability. Additionally, utilizing co-digested where multiple organic waste streams are solid fractions addresses the challenge of managing combined and digested together. This approach not various types of organic waste, contributing to only improves the nutrient balance of the feedstock more sustainable waste management practices. but also enhances the overall efficiency of the This study explores the use of co-digested solid https://www.theamericanjournals.com/index.php/tajabe 1 THE USA JOURNALS THE AMERICAN JOURNAL OF AGRICULTURE AND BIOMEDICAL ENGINEERING (ISSN – 2689-1018) VOLUME 06 ISSUE09 fractions as a viable and sustainable feedstock for type substrates to provide baseline comparisons. biogas production. It examines the effects of The digesters were maintained under controlled incorporating these fractions on biogas yield, temperature conditions (typically 35-37°C) to methane concentration, and overall process simulate mesophilic digestion. Mixing and pH efficiency. The research aims to provide insights control were also implemented to ensure optimal into the benefits of co-digestion, offering a conditions for microbial digestion. potential pathway to improve energy recovery Throughout the digestion period, which typically from organic waste and support the transition to ranged from 30 to 60 days, biogas production was renewable energy sources. By leveraging the monitored continuously. Gas volume and synergies of co-digested solid fractions, biogas composition were measured using gas plants can enhance their operational performance chromatography and volume displacement and contribute to more sustainable and efficient techniques. Key parameters such as methane waste-to-energy solutions. content, carbon dioxide levels, and total biogas METHOD yield were recorded at regular intervals. Additionally, the digestate (post-digestion residue) To assess the viability of co-digested solid fractions was analyzed for remaining organic content and as a sustainable feedstock for biogas production, a nutrient availability. comprehensive experimental approach was employed, focusing on feedstock preparation, The performance of the co-digested solid fractions digestion processes, and analytical evaluations. was evaluated by comparing biogas production The study involved multiple phases, including rates, methane concentrations, and process sample collection, characterization, co-digestion, stability with those from single-substrate controls. and biogas yield measurement. Statistical analyses were conducted to determine the significance of differences observed between The first phase involved the collection of various various feedstock configurations. The study also organic waste materials, including agricultural assessed the operational efficiency of the digesters, residues, municipal solid waste, and food scraps. including any potential issues such as foaming, These materials were initially separated into their acidification, or process inhibition. respective categories and preprocessed to reduce particle size and improve homogeneity. The co- In addition to technical performance, a digested solid fractions were prepared by sustainability assessment was conducted to combining these organic waste streams in specified evaluate the environmental and economic benefits ratios, based on their organic content and nutrient of using co-digested solid fractions. This included profiles. The mixtures were then subjected to a life cycle analysis (LCA) to determine the overall thorough characterization process. This included impact on waste management and energy analyses of chemical oxygen demand (COD), total recovery. The potential for reducing greenhouse solids (TS), volatile solids (VS), and nutrient gas emissions and enhancing resource recovery content (e.g., nitrogen and phosphorus). This was also considered in the evaluation. This characterization ensured that the co-digested solid methodical approach provided a co