Is the Future of Energy Rotten? Novel Perspective on Tri-Phase Fermentation and the Food Waste Paradox

Main Article Content

Rich Jhon Paul Latiza
Rugi Vicente Rubi
Jerry Olay
Allan Soriano

Abstract

Annually, a staggering 1.3 billion tons of edible food are wasted globally, representing not only a substantial economic loss but also a squandered opportunity for sustainable energy production. While anaerobic digestion offers a potential pathway for valorizing this waste, its limitations in feedstock conversion efficiency and substrate versatility necessitate the exploration of innovative alternatives. This comprehensive perspective review elucidates the transformative potential of tri-phase fermentation (TPF), a groundbreaking approach that represents a paradigm shift in waste valorization by synergistically integrating solid-state fermentation (SSF), submerged fermentation (LF), and gas fermentation (GF) to derive bioethanol from food waste. This study highlights the successful integration of these three phases within the TPF framework, demonstrating effective carbohydrate breakdown in SSF, significant ethanol production in LF, and valuable product generation from syngas in GF. By harnessing the metabolic capabilities of diverse microorganisms and leveraging emerging technologies, TPF offers a holistic solution, effectively converting both the primary food waste and its residual byproducts into valuable bioethanol. This review critically examines the fundamental principles, comparative advantages, and inherent challenges associated with each fermentation phase, while also elucidating their potential for synergistic integration within the TPF framework. Furthermore, the technological and economic hurdles inherent to TPF are addressed, emphasizing the need for further research in strain engineering, process optimization, and downstream processing to enhance its commercial viability. This review accentuates and provides a comprehensive perspective on the urgent need for further research and development to fully unlock the transformative potential of TPF and promote a circular bioeconomy by converting food waste into valuable bioethanol, addressing both waste and energy challenges.

Article Details

How to Cite
Paul Latiza, R. J., Rubi, R. V., Olay, J., & Soriano, A. (2025). Is the Future of Energy Rotten? Novel Perspective on Tri-Phase Fermentation and the Food Waste Paradox. Applied Science and Engineering Progress, 18(4), 7735. https://doi.org/10.14416/j.asep.2025.05.008
Section
Review Articles

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M. Gao, H. Zou, W. Tian, D. Shi, H. Chai, L. Gu, Q. He, and W. Z. Tang, “Co-digestive performance of food waste and hydrothermal pretreated corn cob,” Science of The Total Environment, vol. 768, 2021, Art. no. 144448, doi: 10.1016/j.scitotenv.2020.144448.

T. H. Chen, M. Y. Shen, C. Y. Chen, Y. W. Chen, L. H. Wang, C. Y. Chu, M. C. Lee, and H. L. Sun, “Biogas production from food waste hydrolysate using a subcritical water pretreated process and pulp wastewater seed sludge,” Sustainable Energy Technologies and Assessments, vol. 59, 2023, Art. no. 103392, doi: 10.1016/j.seta.2023. 103392.

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A. Wang, X. Li, X. Luo, G. He, D. Huang, Q. Huang, X. X. Zhang, and W. Chen, “Dissolved organic matter characteristics linked to bacterial community succession and nitrogen removal performance in woodchip bioreactors,” Journal of Environmental Sciences, vol. 148, 2025, Art. no. 625, doi: 10.1016/j.jes.2024.01.039.

A. Mielcarek, K. Kłobukowska, B. Kalisz, J. Rodziewicz, and W. Janczukowicz, “Separation and recovery of elements from drainage water arising in soilless tomato cultivation − Application of electrocoagulation,” Separation and Purification Technology, vol. 354, 2025, Art. no. 128805, doi: 10.1016/j.seppur.2024. 128805.

H. Wang, X. Fu, H. Huang, D. Shen, D. Fan, L. Zhu, X. Dai, and B. Dong, “Bioenergy recovery and carbon emissions benefits of short-term bio-thermophilic pretreatment on low organic sewage sludge anaerobic digestion: A pilot-scale study,” Journal of Environmental Sciences, vol. 148, 2024, Art. no. 321, doi: 10.1016/j.jes.2023. 08.022.

S. Ahmed, T. Li, X. Y. Zhou, P. Yi, and R. Chen, “Quantifying the environmental footprints of biofuels for sustainable passenger ship operations,” Renewable and Sustainable Energy Reviews, vol. 207, 2025, Art. no. 114919, doi: 10.1016/j.rser.2024.114919.

J. C. Orellana-Palacios, S. R. Garcia, Y. Rabanal-Ruiz, D. J. McClements, A. Moreno, and M. Hadidi, “Corn silk as an underutilized sustainable source of plant proteins: Extraction, fractionation, structure, and techno-functional properties,” Food Hydrocolloids, vol. 158, 2025, Art. no. 110550, doi: 10.1016/j.foodhyd.2024. 110550.

Y. Sumathi, P. Kumar, R. R. Singhania, C. W. Chen, B. Gurunathan, C. D. Dong, and A. K. Patel, “Harnessing Fe3O4 nanoparticles for sustainable harvesting of astaxanthin-producing microalgae: Advancing industrial-scale biorefinery,” Separation and Purification Technology, vol. 353, 2025, Art. no. 128408, doi: 10.1016/j.seppur.2024.128408.

X. Cao, S. Li, and C. Liu, “Effect of lysozyme combined with hydrothermal pretreatment on excess sludge and anaerobic digestion,” Journal of Environmental Sciences, vol. 147, 2025, Art. no. 36, doi: 10.1016/j.jes.2023.10.001.

J. Xu, W. Zhao, S. Xu, Q. Cao, M. Zhang, Y. Qu, C. Geng, H. Jia, and X. Wang, “Convenient preparation of inexpensive sandwich-type poly(vinylidene fluoride)/molecular sieve/ethyl cellulose mixed matrix membranes and their effective pre-exploration for the selective separation of CO2 in large-scale industrial utilization,” Separation and Purification Technology, vol. 354, 2025, Art. no. 129154, doi: 10.1016/j.seppur.2024.129154.

V. Pradeshwaran, V. Sundaramoorthy, and A. Saravanakumar, “A comprehensive review on biogas production from food waste: Exploring cutting-edge technologies and innovations,” Biomass and Bioenergy, vol. 188, 2024, Art. no. 107336, doi: 10.1016/j.biombioe.2024.107336.

M. Fernandes Araújo, M. P. Cardeal Volpi, G. Mockaitis, M. A. Morais Junior, A. Carvalho Da Costa, and S. Cândida Rabelo, “Crude glycerol organosolv pretreatment: Chain integration for the production of 2G ethanol and biogas,” Fuel, vol. 379, 2025, Art. no. 132984, doi: 10.1016/ j.fuel.2024.132984.

H. Guo, B. Song, Z. Deng, L. Chen, H. Ren, Q. Xu, X. Xu, “Insights on optimizing landfill site selection inspired by co-fermentation of weathered coal and landfill leachate,” International Biodeterioration & Biodegradation, vol. 196, 2025, Art. no. 105922, doi: 10.1016/j.ibiod.2024.105922.

M. Haq, M. S. Ali, J. S. Park, J. W. Kim, W. Zhang, and B. S. Chun, “Atlantic salmon (Salmo salar) waste as a unique source of biofunctional protein hydrolysates: Emerging productions, promising applications, and challenges mitigation,” Food Chemistry, vol. 462, 2025, Art. no. 141017, doi: 10.1016/j.foodchem.2024. 141017.

W. Volpato Maroldi, I. De Andrade Arruda Fernandes, B. Demczuk Junior, A. Cristina Pedro, G. Maria Maciel, and C. Windson Isidoro Haminiuk, “Waste from the food industry: Innovations in biorefineries for sustainable use of resources and generation of value,” Bioresource Technology, vol. 413, 2024, Art. no. 131447, doi: 10.1016/j.biortech.2024.131447.

Y. Xue, J. M. Moreno, C. Li, and M. K. Harder, “Growing community-based composting programs in China: Implementation and policy lessons from eight cases,” Resources, Conservation and Recycling, vol. 212, 2025, Art. no. 107882, doi: 10.1016/j.resconrec.2024.107882.

I. Bušelić, Ž. Trumbić, J. Hrabar, I. Lepen-Pleić, T. Šegvić-Bubić, E. Kaitetzidou, E. Tibaldi, I. Bočina, L. Grubišić, and E. Sarropoulou, “Unravelling the intricate language of fish guts: Impact of plant-based vs. plant-insect-poultry-based diets on intestinal pathways in European seabass,” Aquaculture, vol. 594, 2025, Art. no. 741385, doi: 10.1016/j.aquaculture.2024.741385.

M. Ferrante, F. Kirsch, and C. Westphal, “Stable pollinator communities in different white clover populations suggest potential win-win scenarios for crop yield and biodiversity,” Agriculture, Ecosystems & Environment, vol. 378, 2025, Art. no. 109295, doi: 10.1016/j.agee.2024.109295.

A. B. Alayande, W. Qi, R. Karthikeyan, S. C. Popat, D. A. Ladner, and G. Amy, “Use of reclaimed municipal wastewater in agriculture: Comparison of present practice versus an emerging paradigm of anaerobic membrane bioreactor treatment coupled with hydroponic controlled environment agriculture,” Water Research, vol. 265, 2024, Art. no. 122197, doi: 10.1016/j.watres.2024.122197.

T. P. C. Ezeorba, E. S. Okeke, M. H. Mayel, C. O. Nwuche, and T. C. Ezike, “Recent advances in biotechnological valorization of agro-food wastes (AFW): Optimizing integrated approaches for sustainable biorefinery and circular bioeconomy,” Bioresource Technology Reports, vol. 26, 2024, Art. no. 101823, doi: 10.1016/j.biteb.2024.101823.

X. Sun, Z. Dou, G. C. Shurson, and B. Hu, “Bioprocessing to upcycle agro-industrial and food wastes into high-nutritional value animal feed for sustainable food and agriculture systems,” Resources, Conservation and Recycling, vol. 201, 2024, Art. no. 107325., doi: 10.1016/j.resconrec.2023.107325.

T. Ding, Z. Guo, Y. Qian, Y. Wang, F. Jiang, Z. Zhang, X. Peng, “Interaction between POM and pore structure during straw decomposition in two soils with contrasting texture,” Soil and Tillage Research, vol. 245, 2025, Art. no. 106288, doi: 10.1016/j.still.2024.106288.

U. S. Behera, J. S. Sangwai, and H. S. Byun, “A comprehensive review on the recent advances in applications of nanofluids for effective utilization of renewable energy,” Renewable and Sustainable Energy Reviews, vol. 207, 2025, Art. no. 114901, doi: 10.1016/j.rser.2024.114901.

M. G. López-Ortega, Y. Guadalajara, T. L. Junqueira, I. L. M. Sampaio, A. Bonomi, and A. Sánchez, “Sustainability analysis of bioethanol production in Mexico by a retrofitted sugarcane industry based on the Brazilian expertise,” Energy, vol. 232, 2021, Art. no. 121056, doi: 10.1016/j.energy.2021. 121056.

M. Wang, J. Qiao, Y. Sheng, J. Wei, H. Cui, X. Li, G. Yue, “Bioconversion of corn fiber to bioethanol: Status and perspectives,” Waste Management, vol. 157, 2023, Art. no. 256, doi: 10.1016/j.wasman.2022.12.026.

J. M. D. Medeiros Dantas, J. R. Gómez Cardozo, J. B. Beigbeder, and J. M. Lavoie, “Comparison of sterilization techniques on different feedstock for sugar preservation and bioethanol fermentation,” Industrial Crops and Products, vol. 198, 2023, Art. no. 116662, doi: 10.1016/j.indcrop.2023.116662.

J. Gong, W. Xu, C. Zhang, Q. Zhu, X. Qin, H. Zhang, and G. Liu, “Effects of esterification and enzymatic modification on the properties of wheat starch and dough,” Food Hydrocolloids, vol. 158, 2025, Art. no. 110509, doi: 10.1016/j.foodhyd.2024.110509.

H. Jiang, J. Liu, W. Liu, Z. Xiao, and S. Fan, “Bioethanol production from cassava fermentation in pervaporation membrane bioreactor fed with high concentration sugar,” Fuel, vol. 362, 2024, Art. no. 130744, doi: 10.1016/j.fuel.2023.130744.

J. Pérez-Barragán, O. García-Depraect, R. Maya-Yescas, R. Vallejo-Rodríguez, H. Palacios-Hinestroza, M. Coca, R. Castro-Muñoz, and E. León-Becerril, “Solid and liquid fractionation of sugarcane and Agave bagasse during ozonolysis and enzymatic hydrolysis: Impact on biohydrogen and biogas production,” Industrial Crops and Products, vol. 210, 2024, Art. no. 118175, doi: 10.1016/j.indcrop.2024.118175.

G. Hodaifa, L. M. Nieto, and M. Kowalska, “Corn stover conversion into bioethanol and xylitol through an integral bioprocess: Kinetic study and modelling,” Journal of the Taiwan Institute of Chemical Engineers, vol. 131, 2022, Art. no. 104202, doi: 10.1016/j.jtice. 2022.104202.

S. Buragohain, P. Mahanta, and K. Mohanty, “Biogas production from anaerobic mono- and co-digestion of lignocellulosic feedstock: Process optimization and its implementation at community level,” Environmental Technology & Innovation, vol. 24, 2021, Art. no. 101981, doi: 10.1016/j.eti.2021.101981.

X. Xie, K. Song, J. Wang, J. Hu, S. Wu, and Q. Chu, “Efficient ethanol production from masson pine sawdust by various organosolv pretreatment and modified pre-hydrolysis simultaneous saccharification and fermentation,” Renewable Energy, vol. 225, 2024, Art. no. 120289, doi: 10.1016/j.renene. 2024.120289.

Y. Gao, C. Song, M. Usman, Z. Zheng, X. Meng, X. Shen, Y. Cai, and X. Wang, “Pretreatment of wheat straw using ammonia rich-liquid fraction of digestate: Contribution of biological and non-biological components in methane yield,” Industrial Crops and Products, vol. 220, 2024, Art. no. 119262, doi: 10.1016/j.indcrop.2024.119262.

E. J. Rifna, M. Dwivedi, D. Seth, R. C. Pradhan, P. K. Sarangi, and B. K. Tiwari, “Transforming the potential of renewable food waste biomass towards food security and supply sustainability,” Sustainable Chemistry and Pharmacy, vol. 38, 2024, Art. no. 101515, doi: 10.1016/j.scp.2024.101515.

D. Xu, Y. Wang, H. Hu, D. Yellezuome, F. He, and J. Cai, “Energy consumption balance and environmental benefits from the pyrolysis of switchgrass cultivated on marginal lands with biochar application to soil in China,” Industrial Crops and Products, vol. 219, 2024, Art. no. 119148, doi: 10.1016/j.indcrop.2024.119148.

H. Lee, Y. Jung Sohn, S. Jeon, H. Yang, J. Son, Y. Jin Kim, and S. J. Park, “Sugarcane wastes as microbial feedstocks: A review of the biorefinery framework from resource recovery to production of value-added products,” Bioresource Technology, vol. 376, 2023, Art. no. 128879, doi: 10.1016/j.biortech.2023.128879.

A. M. Elgarahy, M. G. Eloffy, A. Alengebawy, D. M. El-Sherif, M. S. Gaballah, K.Z. Elwakeel, and M. El-Qelish, “Sustainable management of food waste; pre-treatment strategies, techno-economic assessment, bibliometric analysis, and potential utilizations: A systematic review,” Environmental Research, vol. 225, 2023, Art. no. 115558, doi: 10.1016/j.envres.2023.115558.

T. A. Moonsamy, G. Rajauria, A. Priyadarshini, and M. A. K. Jansen, “Food waste: Analysis of the complex and variable composition of a promising feedstock for valorisation,” Food and Bioproducts Processing, vol. 148, 2024, Art. no. 31, doi: 10.1016/j.fbp.2024.08.012.

R. F. Gonçalves, T. I. Assis, G. B. Maciel, R. M. Borges, and S. T. A. Cassini, “Co-digestion of municipal wastewater and microalgae biomass in an upflow anaerobic sludge blanket reactor,” Algal Research, vol. 52, 2020, Art. no. 102117, doi: 10.1016/j.algal.2020.102117.

C. Rong, T. Wang, Z. Luo, Y. Hu, Z. Kong, Y. Qin, T. Hanaoka, M. Ito, M. Kobayashi, Y.-Y. Li, “Pilot plant demonstration of temperature impacts on the methanogenic performance and membrane fouling control of the anaerobic membrane bioreactor in treating real municipal wastewater,” Bioresource Technology, vol. 354, 2022, Art. no. 127167, doi: 10.1016/ j.biortech.2022.127167.

C. Rong, T. Wang, Z. Luo, and Y. Y. Li, “Achieving low-carbon municipal wastewater treatment by anaerobic membrane bioreactor at seasonal temperatures: A pilot scale investigation on reducing sludge yield and greenhouse gas emissions,” Chemical Engineering Journal, vol. 463, 2023, Art. no. 142415, doi: 10.1016/j.cej.2023.142415.

A. Thongsai, C. Phuttaro, K. Saritpongteeraka, B. Charnnok, J. Bae, P. (Lek) Noophan, and S. Chaiprapat, “Efficacy of anaerobic membrane bioreactor under intermittent liquid circulation and its potential energy saving against a conventional activated sludge for industrial wastewater treatment,” Energy, vol. 244, 2022, Art. no. 122556, doi: 10.1016/j.energy.2021. 122556.

M. Turker and R. K. Dereli, “Long term performance of a pilot scale anaerobic membrane bioreactor treating beet molasses based industrial wastewater,” Journal of Environmental Management, vol. 278, 2021, Art. no. 111403, doi: 10.1016/j.jenvman.2020. 111403.

G. Shang, G. Xu, J. Ren, J. P. Yu, W. Cai, K. Cui, P. Jin, and K. Guo, “A cathodic electro-fermentation system for enhanced methane production from high-concentration potato starch industrial wastewater,” Journal of Water Process Engineering, vol. 59, 2024, Art. no. 105006, doi: 10.1016/j.jwpe.2024.105006.

K. B. Prajapati and R. Singh, “Enhancement of biogas production in bio-electrochemical digester from agricultural waste mixed with wastewater,” Renewable Energy, vol. 146, 2020, Art. no. 460, doi: 10.1016/j.renene.2019. 06.154.

M. Custodio, R. Peñaloza, C. Espinoza, W. Espinoza, and J. Mezarina, “Treatment of dairy industry wastewater using bacterial biomass isolated from eutrophic lake sediments for the production of agricultural water,” Bioresource Technology Reports, vol. 17, 2022, Art. no. 100891, doi: 10.1016/j.biteb.2021.100891.

T. Bunraksa, D. Kantachote, and S. Chaiprapat, “The potential use of purple nonsulfur bacteria to simultaneously treat chicken slaughterhouse wastewater and obtain valuable plant growth promoting effluent and their biomass for agricultural application,” Biocatalysis and Agricultural Biotechnology, vol. 28, 2020, Art. no. 101721, doi: 10.1016/j.bcab.2020.101721.

B. Kazmi, T. Sadiq, S. A. A. Taqvi, S. Nasir, M. M. Khan, S. R. Naqvi, and H. AlMohamadi, “Towards a sustainable future: Bio-hydrogen production from food waste for clean energy generation,” Process Safety and Environmental Protection, vol. 183, 2024, Art. no. 555, doi: 10.1016/j.psep.2024.01.045.

M. Cucina, “Integrating anaerobic digestion and composting to boost energy and material recovery from organic wastes in the Circular Economy framework in Europe: A review,” Bioresource Technology Reports, vol. 24, 2023, Art. no. 101642, doi: 10.1016/j.biteb. 2023.101642.

J. Nyitrai, X. F. Almansa, K. Zhu, S. Banerjee, T. R. Hawkins, M. Urgun-Demirtas, L. Raskin, and S. J. Skerlos, “Environmental life cycle assessment of treatment and management strategies for food waste and sewage sludge,” Water Research, vol. 240, 2023, Art. no. 120078, doi: 10.1016/j.watres.2023.120078.

R. J. P. Latiza, A. Mustafa, K. Delos Reyes, K. L. Nebres, and R. V. Rubi, “Adsorbents derived from plant sources for caffeine removal: Current research and future outlook,” in The 3rd International Electronic Conference on Processes, p. 15, 2024. doi: 10.3390/ engproc2024067015.

K. Ding, D. Liu, X. Chen, H. Zhang, S. Shi, X. Guo, L. Zhou, L. Han, and W. Xiao, “Scalable lignocellulosic biorefineries: Technoeconomic review for efficient fermentable sugars production,” Renewable and Sustainable Energy Reviews, vol. 202, 2024, Art. no. 114692, doi: 10.1016/j.rser.2024.114692.

H. Adamu, U. Bello, A. U. Yuguda, U. I. Tafida, A. M. Jalam, A. Sabo, and M. Qamar, “Production processes, techno-economic and policy challenges of bioenergy production from fruit and vegetable wastes,” Renewable and Sustainable Energy Reviews, vol. 186, 2023, Art. no. 113686, doi: 10.1016/j.rser. 2023.113686.

G. Singh, S. Sahu, S. Bharti, and S. K. Arya, “Significance of enzymes for the recycling of wasted non-food biomass to value added products: A sustainable stewardship towards the cleaner environment,” Process Safety and Environmental Protection, vol. 190, 2024, Art. no. 395, doi: 10.1016/j.psep.2024.07.063.

L. Zou, Z. Qi, H. Cheng, B. Yu, Y. Y. Li, and J. Liu, “Advanced anaerobic digestion of household food waste pretreated by in situ-produced mixed enzymes via solid-state fermentation: Feasibility and application perspectives,” Environmental Research, vol. 252, 2024, Art. no. 119137, doi: 10.1016/ j.envres.2024.119137.

R. J. P. Latiza and R. V. Rubi, “Circular economy integration in 1G+2G sugarcane bioethanol production: Application of carbon capture, utilization and storage, closed-loop systems, and waste valorization for sustainability,” Applied Science and Engineering Progress, vol. 18, no. 1, 2025, Art. no. 7448, doi: 10.14416/j.asep.2024.07.005.

E. S. Rosas-Mendoza, A. Alvarado-Vallejo, N. A. Vallejo-Cantú, C. Velasco-Santos, and A. Alvarado-Lassman, “Valorization of the complex organic waste in municipal solid wastes through the combination of hydrothermal carbonization and anaerobic digestion,” Renewable Energy, vol. 231, 2024, Art. no. 120916, doi: 10.1016/j.renene.2024. 120916.

P. Torabi, N. Hamdami, N. Soltanizadeh, O. Farhadian, and A. Le-Bail, “Restaurant food waste valorization by microwave-assisted hydrolysis: Optimization, typological and biochemical analysis,” Cleaner Materials, vol. 13, 2024, Art. no. 100269, doi: 10.1016/ j.clema.2024.100269.

S. Rehman, Y. S. Yang, R. D. Patria, T. Zulfiqar, N. K. Khanzada, R. J. Khan, C. S. K. Lin, D. J. Lee, and S. Y. Leu, “Substrate-related factors and kinetic studies of carbohydrate-rich food wastes on enzymatic saccharification,” Bioresource Technology, vol. 390, 2023, Art. no. 129858, doi: 10.1016/j.biortech.2023.129858.

L. Mora and F. Toldrá, “Advanced enzymatic hydrolysis of food proteins for the production of bioactive peptides,” Current Opinion in Food Science, vol. 49, 2023, Art. no. 100973, doi: 10.1016/j.cofs.2022.100973.

K. A. Shukla, A. D. A. Bin Abu Sofian, A. Singh, W. H. Chen, P. L. Show, and Y. J. Chan, “Food waste management and sustainable waste to energy: Current efforts, anaerobic digestion, incinerator and hydrothermal carbonization with a focus in Malaysia,” Journal of Cleaner Production, vol. 448, 2024, Art. no. 141457, doi: 10.1016/j.jclepro.2024. 141457.

M. T. Aminzai, E. Yabalak, D. Kalderis, and A. M. Gizir, “Environmental remediation of emerging contaminants using subcritical water: A review,” Journal of Environmental Management, vol. 366, 2024, Art. no. 121800, doi: 10.1016/j.jenvman.2024.121800.

J. Bai, Y. Huang, X. Fan, J. Cui, B. Chen, Y. Chen, and L. Guo, “Production of high calorific value hydrogen-rich combustible gas by supercritical water gasification of straw assisted by machine learning,” Bioresource Technology, vol. 410, 2024, Art. no. 131275, doi: 10.1016/j.biortech.2024.131275.

L. Deng, C. Su, Y. Wu, Q. Xue, C. Zhang, Y. Wang, B. Wang, and D. Cai, “High-titer l-lactic acid production by fed-batch simultaneous saccharification and fermentation of steam-exploded corn stover,” Fermentation, vol. 11, no. 1, 2025, Art. no. 25, doi: 10.3390/fermentation11010025.

B. Samantaray, S. Mohapatra, B. Pradhan, B. C. Behera, R. R. Mishra, and H. Thatoi, “Utilization of cotton stalk waste for sustainable isopropanol production via hydrolysis and coculture fermentation,” International Biodeterioration & Biodegradation, vol. 195, 2024, Art. no. 105908, doi: 10.1016/j.ibiod.2024.105908.

Y. Le, M. Zhang, P. Wu, H. Wang, and J. Ni, “Biofuel production from lignocellulose via thermophile-based consolidated bioprocessing,” Engineering Microbiology, vol. 4, no. 4, 2024, Art. no. 100174, doi: 10.1016/j.engmic.2024. 100174.

Z. Li, P. R. Waghmare, L. Dijkhuizen, X. Meng, and W. Liu, “Research advances on the consolidated bioprocessing of lignocellulosic biomass,” Engineering Microbiology, vol. 4, no. 2, 2024, Art. no. 100139, doi: 10.1016/ j.engmic.2024.100139.

J. Luo, C. Zhao, W. Huang, F. Wang, F. Fang, L. Su, D. Wang, and Y. Wu, “A holistic valorization of treasured waste activated sludge for directional high-valued products recovery: Routes, key technologies and challenges,” Environmental Research, vol. 262, 2024, Art. no. 119904, doi: 10.1016/j.envres.2024.119904.

N. Muñoz-Seijas, H. Fernandes, D. Outeiriño, M. G. Morán-Aguilar, J. M. Domínguez, and J. M. Salgado, “Potential use of frass from edible insect Tenebrio molitor for proteases production by solid-state fermentation,” Food and Bioproducts Processing, vol. 144, 2024, Art. no. 146, doi: 10.1016/j.fbp.2024.01.002.

S. Das, C. T, R. Selvasembian, and A. A. Prabhu, “Mixed food waste valorization using a thermostable glucoamylase enzyme produced by a newly isolated filamentous fungus: A sustainable biorefinery approach,” Chemosphere, vol. 352, 2024, Art. no. 141480, doi: 10.1016/j.chemosphere.2024.141480.

L. Perret, N. Boukis, and J. Sauer, “Synthesis gas fermentation at high cell density: How pH and hydrogen partial pressure affect productivity and product ratio in continuous fermentation,” Bioresource Technology, vol. 391, 2024, Art. no. 129894, doi: 10.1016/j.biortech.2023.129894.

M. S. Hossain, F. Wasima, M. S. I. K. Shawon, M. Mourshed, and B. K. Das, “Valorization of food waste into hydrogen energy through supercritical water gasification: Generation potential and techno-econo-environmental feasibility assessment,” Renewable Energy, vol. 235, 2024, Art. no. 121382, doi: 10.1016/j.renene.2024.121382.

D. H. E. Salamony, M. Salah Eldin Hassouna, Taha. I. Zaghloul, and H. Moustafa Abdallah, “Valorization of chicken feather waste using recombinant bacillus subtilis cells by solid-state fermentation for soluble proteins and serine alkaline protease production,” Bioresource Technology, vol. 393, 2024, Art. no. 130110, doi: 10.1016/j.biortech.2023.130110.

M. G. Adsul, “Cellulolytic enzymes recycling strategies for the economic conversion of lignocellulosic biomass to fuels,” Process Biochemistry, vol. 147, 2024, Art. no. 62, doi: 10.1016/j.procbio.2024.08.009.

N. Kukreti, P. Kumar, and R. Kataria, “Sustainable biotransformation of lignocellulosic biomass to microbial enzymes: An overview and update,” Industrial Crops and Products, vol. 222, 2024, Art. no. 119432, doi: 10.1016/j.indcrop.2024.119432.

H. Priadi, S. Awad, A. Villot, Y. Andres, and W. W. Purwanto, “Techno-enviro-economic analysis of second-generation bioethanol at plant-scale by different pre-treatments of biomass from palm oil waste,” Energy Conversion and Management: X, vol. 21, 2024, Art. no. 100522, doi: 10.1016/j.ecmx.2023. 100522.

S. P. Kulkarni, “Supercritical water hydrolysis of cellulose: State-of-the-art of green depolymerisation technique,” Biomass and Bioenergy, vol. 184, 2024, Art. no. 107182, doi: 10.1016/j.biombioe.2024.107182.

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J. Chen, Y. Cai, Z. Wang, Z. Xu, W. Zhuang, D. Liu, Y. Lv, S. Wang, J. Xu, and H. Ying, “Solid-state fermentation of corn straw using synthetic microbiome to produce fermented feed: The feed quality and conversion mechanism,” Science of The Total Environment, vol. 920, 2024, Art. no. 171034, doi: 10.1016/j.scitotenv.2024.171034.

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N. Oiza, J. Moral-Vico, A. Sánchez, and T. Gea, “Enhanced anaerobic digestion of food waste using purified lactonic sophorolipids produced by solid-state fermentation of molasses and oil waste: A circular approach,” Journal of Cleaner Production, vol. 468, 2024, Art. no 143062, doi: 10.1016/j.jclepro.2024. 143062.

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C. R. Manuel, Q. F. Carlos, P. C. Carmen, V.-D. L. Marisela, and M. A. Iván, “Fungal solid-state fermentation of food waste for biohydrogen production by dark fermentation,” International Journal of Hydrogen Energy, vol. 47, no. 70, 2022, Art. no. 30062, doi: 10.1016/j.ijhydene.2022.06.313.

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Y. Zhai, S. Tong, L. Chen, Y. Zhang, F. R. Amin, H. Khalid, F. Liu, Y. Duan, W. Chen, G. Chen, D. Li, “The enhancement of energy supply in syngas-fermenting microorganisms,” Environmental Research, vol. 252, 2024, Art. no. 118813, doi: 10.1016/j.envres.2024.118813.

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L. Yu, R. Zhang, C. Cao, L. Liu, J. Fang, and H. Jin, “Hydrogen production from supercritical water gasification of lignin catalyzed by Ni supported on various zeolites,” Fuel, vol. 319, 2022, Art. no. 123744, doi: 10.1016/j.fuel.2022.123744.

C. Cao, C. Bian, G. Wang, B. Bai, Y. Xie, and H. Jin, “Co-gasification of plastic wastes and soda lignin in supercritical water,” Chemical Engineering Journal, vol. 388, 2020, Art. no. 124277, doi: 10.1016/j.cej.2020.124277.

C. Cao, L. Yu, Y. Xie, W. Wei, and H. Jin, “Hydrogen production by supercritical water gasification of lignin over CuO–ZnO catalyst synthesized with different methods,” International Journal of Hydrogen Energy, vol. 47, no. 14, 2022, Art. no. 8716, doi: 10.1016/j.ijhydene.2021.12.230.

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J. Liu, S. Hamid Fauziah, L. Zhong, J. Jiang, G. Zhu, and M. Yan, “Conversion of kitchen waste effluent to H2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst,” Fuel, vol. 314, 2022, Art. no. 123042, doi: 10.1016/j.fuel.2021.123042.

I. M. Dias, L. C. Mourão, L. A. Andrade, G. B. M. Souza, J. C. V. Viana, S. B. Oliveira, C. G. Alonso, “Degradation of antibiotic amoxicillin from pharmaceutical industry wastewater into a continuous flow reactor using supercritical water gasification,” Water Research, vol. 234, 2023, Art. no. 119826, doi: 10.1016/j.watres. 2023.119826.

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C. Siah Lee, A. V. Conradie, and E. Lester, “The integration of low temperature supercritical water gasification with continuous in situ nano-catalyst synthesis for hydrogen generation from biomass wastewater,” Chemical Engineering Journal, vol. 455, 2023, Art. no. 140845, doi: 10.1016/ j.cej.2022.140845.

M. Yan, J. Liu, K. Yoshikawa, J. Jiang, Y. Zhang, G. Zhu, Y. Liu, and D. Hantoko, “Cascading disposal for food waste by integration of hydrothermal carbonization and supercritical water gasification,” Renewable Energy, vol. 186, 2022, Art. no. 914, doi: 10.1016/j.renene.2022.01.049.

M. Yan, H. Su, Z. Zhou, D. Hantoko, J. Liu, J. Wang, R. Wang, and E. Kanchanatip, “Gasification of effluent from food waste treatment process in sub- and supercritical water: H2-rich syngas production and pollutants management,” Science of The Total Environment, vol. 730, 2020, Art. no. 138517, doi: 10.1016/j.scitotenv.2020.138517.

X. Qi, X. Li, F. Liu, L. Lu, H. Jin, W. Wei, Y. Chen, and L. Guo, “Hydrogen production by kraft black liquor supercritical water gasification: Reaction pathway and kinetic,” Energy, vol. 282, 2023, Art. no. 128839, doi: 10.1016/j.energy.2023.128839.

P. Casademont, J. Sánchez-Oneto, A. P. J. Scandelai, L. Cardozo-Filho, and J. R. Portela, “Hydrogen production by supercritical water gasification of black liquor: Use of high temperatures and short residence times in a continuous reactor,” The Journal of Supercritical Fluids, vol. 159, 2020, Art. no. 104772, doi: 10.1016/j.supflu.2020.104772.

X. Qi, J. Zhang, X. Li, J. Cui, Y. Chen, H. Jin, and L. Guo, “Mechanistic insights and catalytic enhancement of phenolic wastewater supercritical water gasification: A combined experiment and density functional theory study,” Journal of Environmental Management, vol. 358, 2024, Art. no. 120836, doi: 10.1016/j.jenvman.2024.120836.

H. Feng, J. Cui, Z. Xu, D. Hantoko, L. Zhong, D. Xu, and M. Yan, “Sewage sludge treatment via hydrothermal carbonization combined with supercritical water gasification: Fuel production and pollution degradation,” Renewable Energy, vol. 210, 2023, Art. no. 822, doi: 10.1016/j.renene.2023.04.071.

J. Cui, H. Wang, D. Hantoko, X. Wen, E. Kanchanatip, and M. Yan, “Nitrogen and phosphorus recovery from sludge treatment by supercritical water gasification coupled with struvite crystallization,” Journal of Water Process Engineering, vol. 55, 2023, Art. no. 104070, doi: 10.1016/j.jwpe.2023.104070.

Y. Chen, Y. He, H. Jin, and L. Guo, “Resource utilization of landfill leachate gasification in supercritical water,” Chemical Engineering Journal, vol. 386, 2020, Art. no. 124017, doi: 10.1016/j.cej.2020.124017.

V. Kumar, S. K. Malyan, W. Apollon, and P. Verma, “Valorization of pulp and paper industry waste streams into bioenergy and value-added products: An integrated biorefinery approach,” Renewable Energy, vol. 228, 2024, Art. no. 120566, doi: 10.1016/ j.renene.2024.120566.

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N. Chu, D. Li, R. Jianxiong Zeng, Y. Jiang, and P. Liang, “Microbial electrochemical wastewater refining,” Engineering, 2024, Art. no. S2095809924004752, doi: 10.1016/j.eng. 2024.07.018.

G. Tokuda, “Origin of symbiotic gut spirochetes as key players in the nutrition of termites,” Environmental Microbiology, vol. 23, no. 8, 2021, Art. no. 4092, doi: 10.1111/ 1462-2920.15625.

M. Fatimah, M. A. Qyyum, M. Lee, R. S. Alshareef, M. Aslam, B. Saeed, L. Dai, M. A. Gilani, A. A. Bazmi, I. S. Chang, H. AlMohamadi, A. L. Khan, and M. Yasin, “Industrial waste gases as a resource for sustainable hydrogen production: Resource availability, production potential, challenges, and prospects,” Carbon Capture Science & Technology, vol. 12, 2024, Art. no. 100228, doi: 10.1016/j.ccst.2024.100228.

D. S. Nabila, R. Chan, R. R. P. Syamsuri, P. Nurlilasari, W. A. A. Q. I. Wan-Mohtar, A. B. Ozturk, N. Rossiana, and F. Doni, “Biobutanol production from underutilized substrates using Clostridium: Unlocking untapped potential for sustainable energy development,” Current Research in Microbial Sciences, vol. 7, 2024, Art. no. 100250, doi: 10.1016/j.crmicr.2024. 100250.

M. Adams, Y. Wang, B. Du, I. Olbert, and G. Wu, “Operational mode and powdered activated carbon promoting syntrophic propionate oxidation during anaerobic digestion of complex organic substances,” Journal of Environmental Management, vol. 356, 2024, Art. no. 120593, doi: 10.1016/ j.jenvman.2024.120593.

A. Grimalt-Alemany, M. Łężyk, K. Asimakopoulos, I. V. Skiadas, and H. N. Gavala, “Cryopreservation and fast recovery of enriched syngas-converting microbial communities,” Water Research, vol. 177, 2020, Art. no. 115747, doi: 10.1016/j.watres. 2020.115747.

H. Yang, C. Zhang, N. Lai, B. Huang, P. Fei, D. Ding, P. Hu, Y. Gu, and H. Wu, “Efficient isopropanol biosynthesis by engineered Escherichia coli using biologically produced acetate from syngas fermentation,” Bioresource Technology, vol. 296, 2020, Art. no. 122337, doi: 10.1016/j.biortech.2019.122337.

R. Robles-Iglesias, J. M. Nicaud, M. C. Veiga, and C. Kennes, “Integrated fermentative process for lipid and β-carotene production from acetogenic syngas fermentation using an engineered oleaginous Yarrowia lipolytica yeast,” Bioresource Technology, vol. 389, 2023, Art. no. 129815, doi: 10.1016/j.biortech. 2023.129815.

E. T. Liakakou, A. Infantes, A. Neumann, and B. J. Vreugdenhil, “Connecting gasification with syngas fermentation: Comparison of the performance of lignin and beech wood,” Fuel, vol. 290, 2021, Art. no. 120054, doi: 10.1016/ j.fuel.2020.120054.

T. An and Y. K. Kim, “Effect of selenium and tungsten on cell growth and metabolite production in syngas fermentation using Clostridium autoethanogenum,” Journal of Biotechnology, vol. 356, 2022, Art. no. 60, doi: 10.1016/j.jbiotec.2022.07.004.

M. U. Monir, A. A. Aziz, F. Khatun, and A. Yousuf, “Bioethanol production through syngas fermentation in a tar free bioreactor using Clostridium butyricum,” Renewable Energy, vol. 157, 2020, Art. no. 1116, doi: 10.1016/j.renene.2020.05.099.

C. Quintela, A. Grimalt-Alemany, O. Modin, Y. Nygård, L. Olsson, I. V. Skiadas, and H. N. Gavala, “Effect of pH in syngas conversion to C4 & C6 acids in mixed-culture trickle bed reactors,” Biomass and Bioenergy, vol. 187, 2024, Art. no. 107292, doi: 10.1016/ j.biombioe.2024.107292.

C. Fernández-Blanco, M. C. Veiga, and C. Kennes, “Efficient production of n-caproate from syngas by a co-culture of Clostridium aceticum and Clostridium kluyveri,” Journal of Environmental Management, vol. 302, 2022, Art. no. 113992, doi: 10.1016/j.jenvman.2021. 113992.

P. Kottenhahn, G. Philipps, and S. Jennewein, “Hexanol biosynthesis from syngas by Clostridium carboxidivorans P7 – product toxicity, temperature dependence and in situ extraction,” Heliyon, vol. 7, no. 8, 2021, Art. no. e07732, doi: 10.1016/j.heliyon.2021.e07732.

Y. Xiang, H. Luo, G. Liu, and R. Zhang, “Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures,” Water Cycle, vol. 3, 2022, Art. no. 26, doi: 10.1016/j.watcyc. 2022.02.001.

D. Andreides, M. A. Lopez Marin, and J. Zabranska, “Selective syngas fermentation to acetate under acidic and psychrophilic conditions using mixed anaerobic culture,” Bioresource Technology, vol. 394, 2024, Art. no. 130235, doi: 10.1016/j.biortech.2023. 130235.

V. Sivalingam, D. Winkler, T. Haugen, A. Wentzel, and C. Dinamarca, “Syngas fermentation and microbial electrosynthesis integration as a single process unit,” Bioresource Technology, vol. 356, 2022, Art. no. 127314, doi: 10.1016/j.biortech.2022.127314.

M. U. Monir, A. Abd Aziz, A. Yousuf, and M. Z. Alam, “Hydrogen-rich syngas fermentation for bioethanol production using Sacharomyces cerevisiea,” International Journal of Hydrogen Energy, vol. 45, no. 36, 2020, Art. no. 18241, doi: 10.1016/j.ijhydene.2019.07.246.

L. Zhang, P. Hu, J. Pan, H. Yu, and J. Xu, “Immobilization of trophic anaerobic acetogen for semi-continuous syngas fermentation,” Chinese Journal of Chemical Engineering, vol. 29, 2021, Art. no. 311, doi: 10.1016/j.cjche. 2020.07.041.

J. H. Kim, M. Lee, H. Jeong, S. Ko, S. H. Moon, and I. S. Chang, “Recycling of minerals with acetate separation in biological syngas fermentation with an electrodialysis system,” Chemical Engineering Journal, vol. 459, 2023, Art. no. 141555, doi: 10.1016/j.cej.2023.141555.

P. Thatiyamanee, P. Laopaiboon, and L. Laopaiboon, “Optimizing bioethanol production from sweet sorghum stem juice under very high gravity fermentation and temperature stress conditions,” Carbon Resources Conversion, 2024, Art. no. 100274, doi: 10.1016/j.crcon.2024.100274.

J. Tang, Z. Hu, Y. Pu, X. C. Wang, and A. Abomohra, “Bioprocesses for lactic acid production from organic wastes toward industrialization-A critical review,” Journal of Environmental Management, vol. 369, 2024, Art. no. 122372, doi: 10.1016/j.jenvman.2024. 122372.

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S. Subudhi, D. Mudgil, K. Saha, P. K. Sarangi, and P. Pal, “Yeast as a cell factory for fermentative production of ethanol from xylose,” Journal of the Taiwan Institute of Chemical Engineers, 2024, Art. no. 105616, doi: 10.1016/j.jtice.2024.105616.

E. Santoyo-Castelazo, E. Santoyo, L. Zurita-García, D. A. Camacho Luengas, and K. Solano-Olivares, “Life cycle assessment of bioethanol production from sugarcane bagasse using a gasification conversion process: Bibliometric analysis, systematic literature review and a case study,” Applied Thermal Engineering, vol. 219, 2023, Art. no. 119414, doi: 10.1016/j.applthermaleng.2022.119414.

P. J. Jacqueline and G. Velvizhi, “Co-fermentation exploiting glucose and xylose utilizing thermotolerant S. cerevisiae of highly lignified biomass for biofuel production: Statistical optimization and kinetic models,” Biocatalysis and Agricultural Biotechnology, vol. 58, 2024, Art. no. 103197, doi: 10.1016/ j.bcab.2024.103197.

Z. X. Shen and S. Y. Li, “Increasing the atom economy of glucose fermentation for bioethanol production in Rubisco-based engineered Escherichia coli,” Bioresource Technology Reports, vol. 21, 2023, Art. no. 101370, doi: 10.1016/j.biteb.2023.101370.

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