Keywords
How to Cite
Abstract
Introduction. The efficiency of biogas production systems depends on internal factors (temperature, pH level, C/N ratio, organic loading rate – OLR, hydraulic retention time – HRT, and inhibitory substances) as well as external factors (climatic conditions, availability of feedstock, economic barriers, and lack of technical expertise).
Materials and Methods. The aim of this study is to systematically analyze the internal and external factors affecting biogas production efficiency and to identify optimization opportunities under the conditions of Uzbekistan.
Results. Based on literature analysis, optimal parameters were identified (mesophilic temperature range of 35–40°C, pH 6.8–7.2, C/N ratio of 20–30:1), along with the consequences of deviations (a decrease in methane yield by 30–80%). In Uzbekistan, key limiting factors include cold periods (psychrophilic conditions), challenges in waste transportation, and insufficient subsidies.
Conclusion. The study proposes technical solutions such as solar-assisted heating, co-digestion, microaerobic conditions, and small-scale bioreactors, as well as policy measures including subsidies, educational programs, and expansion of pilot projects. Implementation of these measures can significantly enhance the development of biogas technologies in Uzbekistan, promote agricultural waste recycling, and reduce carbon emissions.
References
[1]. Nwokolo N., et al. Factors affecting anaerobic digestion for biogas production: a review // Advanced Biorefineries for Sustainable Production and Distribution. – 2023. – DOI: 10.1016/B978-0-323-85792-5.00020-4.
[2]. Alimoradi A., et al. Biogas: Production, properties, applications, economic and challenges: A review // Fuel. – 2024. – Vol. 377. – Art. 132782. – DOI: 10.1016/j.fuel.2024.132782.
[3]. Bose D., et al. Emerging technologies for biogas production: A critical review on recent progress, challenges and future perspectives // Progress in Energy and Combustion Science. – 2024. – Vol. 103. – Art. 101345. – DOI: 10.1016/j.pecs.2024.101345.
[4]. Elsharkawy K., et al. Enhancing anaerobic digestion efficiency: A comprehensive review on innovative intensification technologies // Energy Conversion and Management. – 2024. – Vol. 317. – Art. 118863. – DOI: 10.1016/j.enconman.2024.118863.
[5]. Mittal S., et al. Barriers to the wider implementation of biogas as a source of energy: A state-of-the-art review // Energy Strategy Reviews. – 2019. – Vol. 26. – Art. 100414. – DOI: 10.1016/j.esr.2019.100414.
[6]. Glivin G., et al. A review on operating parameters, types of biodigesters, solar assisted heating systems, socio-economic benefits and challenges // Chemosphere. – 2022. – Vol. 293. – Art. 133579. – DOI: 10.1016/j.chemosphere.2022.133579.
[7]. Saidmamatov O., Rudenko I., Baier U., Khodjaniyazov E. Challenges and solutions for biogas production from agriculture waste in the Aral Sea Basin // Processes. – 2021. – Vol. 9, No. 2. – Art. 199. – DOI: 10.3390/pr9020199.
[8]. Saidmamatov O., et al. Biogas production from agricultural waste in the Aral Sea Basin: Development of pilot plants. – REPIC Project Report, 2020.
[9]. Ibro M. K., et al. Biogas production optimization in the anaerobic codigestion process: A critical review on process parameters modeling and simulation tools // Journal of Chemistry. – 2024. – DOI: 10.1155/2024/4599371.
[10]. Advances and Challenges in Anaerobic Digestion for Biogas Production: Policy, Technological, and Microbial Perspectives // Processes. – 2025. – Vol. 13, No. 11. – Art. 3648. – DOI: 10.3390/pr13113648.
[11]. Kinetics and Energy Yield in Anaerobic Digestion: Effects of Substrate Composition and Fundamental Operating Conditions // Energies. – 2025. – Vol. 18, No. 23. – Art. 6262. – DOI: 10.3390/en18236262.
[12]. Optimization of the Factors Affecting Biogas Production Using the Taguchi Design of Experiment Method // Biomass. – 2024. – Vol. 4, No. 3. – P. 687–703. – DOI: 10.3390/biomass4030038.
[13]. Emerging materials and pretreatment strategies in anaerobic digestion for biogas production: A review on recent advances, limitations, and future perspectives // Industrial Crops and Products. – 2025. – Vol. 224. – Art. 120218. – DOI: 10.1016/j.indcrop.2024.120218.
[14]. New insights into the factors influencing methanogenic pathways in anaerobic digesters // Anaerobe. – 2024. – Art. 102925. – DOI: 10.1016/j.anaerobe.2024.102925.
[15]. Effect of Anaerobic Digestion Parameters for Enhanced Biogas Production in Wastewater Treatment Process Using Statistical Experimental Design Analysis // International Journal of Environmental Science and Development. – 2024. – Vol. 16, No. 3. – DOI: 10.7763/IJESD.2024.V16.1524.
[16]. Development and performance analysis of a biogas reactor using livestock manure // Science, Technology and Environmental Trends. – 2025. – No. 1. – Art. 340385. – DOI: 10.21608/stet.2025.340385.
[17]. A critical review of biogas production and upgrading from organic wastes: Recent advances, challenges and opportunities // Biomass and Bioenergy. – 2025. – Vol. 194. – Art. 107566. – DOI: 10.1016/j.biombioe.2024.107566.
[18]. Investigating the barriers and mitigation strategies for biogas adoption in a developing economy: A multi-stakeholder networks perspective // Process Safety and Environmental Protection. – 2024. – DOI: 10.1016/j.psep.2024.6281.
[19]. Kumar R., et al. A comprehensive review on biogas production from food waste: Exploring cutting-edge technologies and innovations // Bioresource Technology Reports. – 2024. – Vol. 25. – Art. 101739. – DOI: 10.1016/j.biteb.2023.101739.
[20]. Biogases – Renewables 2025 – Analysis. – Paris: International Energy Agency (IEA), 2025.
[21]. Reshaping Energy in Eurasia: Insights from Kazakhstan and Uzbekistan. – PwC Report. – 2025.
[22]. Moset V., Poulsen M., de Albuquerque B. M. R., Nielsen J. L. Mesophilic versus thermophilic anaerobic digestion of cattle manure: methane productivity and microbial ecology // Microbial Biotechnology. – 2015. – Vol. 8, No. 5. – P. 787–800. – DOI: 10.1111/1751-7915.12271.
[23]. Saady N. M. C. Impact of organic loading rate on psychrophilic anaerobic digestion of solid dairy manure // Energies. – 2015. – Vol. 8, No. 3. – P. 1990–2015. – DOI: 10.3390/en8031990.
[24]. O‘zbekiston Respublikasi Ekologiya, atrof-muhitni muhofaza qilish va iqlim o‘zgarishi vazirligi. «Ecoenergy» tadqiqot markazi hisoboti. – Toshkent, 2024.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2026 Yakubov, K.R., Qurbanov, O.O., Rahimboyev, R.S. (Muallif)