This study quantitatively investigates the relationship between the implementation of waste-to-resource systems and the economic and environmental performance of circular economy transitions. Using survey data from 350 respondents, the research employs regression analysis to test its hypotheses. The key finding is that adopting waste-to-resource systems has a significant positive correlation with both economic gains and environmental sustainability, with effectiveness being moderated by technological, regulatory, and socio-cultural factors.
KeywordsCircular EconomyWaste-to-Resource SystemsEconomic PerformanceEnvironmental SustainabilityTechnological FactorsRegulatory FactorsSocio-Cultural FactorsSustainable Development
Abdelfattah, A., Ali, S. S., Ramadan, H., El-Aswar, E. I., Eltawab, R., Ho, S. et al. (2023). Microalgae-Based Wastewater Treatment: Mechanisms, Challenges, Recent Advances, and Future Prospects. Environmental Science and Ecotechnology, 13, Article ID: 100205. https://doi.org/10.1016/j.ese.2022.100205
Amaral, E. T., Bender, L. B. Y. C., Rizzetti, T. M., & Schneider, R. d. C. d. S. (2023). Removal of Organic Contaminants in Water Bodies or Wastewater by Microalgae of the Genus Chlorella: A Review. Case Studies in Chemical and Environmental Engineering, 8, Article ID: 100476. https://doi.org/10.1016/j.cscee.2023.100476
Arashiro, L. T., Josa, I., Ferrer, I., Van Hulle, S. W. H., Rousseau, D. P. L., & Garfí, M. (2022). Life Cycle Assessment of Microalgae Systems for Wastewater Treatment and Bioproducts Recovery: Natural Pigments, Biofertilizer and Biogas. Science of the Total Environment, 847, Article ID: 157615. https://doi.org/10.1016/j.scitotenv.2022.157615
Atif, S. (2023). Analysing the Alignment between Circular Economy and Industry 4.0 Nexus with Industry 5.0 Era: An Integrative Systematic Literature Review. Sustainable Development, 31, 2155-2175. https://doi.org/10.1002/sd.2542
Bandh, S. A., & Malla, F. A. (2023). Valorization of Microalgal Biomass and Wastewater Treatment . Elsevier.
Bekchanov, M., & Gondhalekar, D. (2022). Business Climate for Energy Regaining and Environmentally Sustainable Waste-to-Resource Technologies. In M. Asif (Ed.), Handbook of Energy and Environmental Security (pp. 501-530). Elsevier. https://doi.org/10.1016/b978-0-12-824084-7.00008-4
Bellido-Pedraza, C. M., Torres, M. J., & Llamas, A. (2024). The Microalgae Chlamydomonas for Bioremediation and Bioproduct Production. Cells, 13, Article No. 1137. https://doi.org/10.3390/cells13131137
Bhatt, P., Bhandari, G., Bhatt, K., & Simsek, H. (2022). Microalgae-Based Removal of Pollutants from Wastewaters: Occurrence, Toxicity and Circular Economy. Chemosphere, 306, Article ID: 135576. https://doi.org/10.1016/j.chemosphere.2022.135576
Bradley, T., Rajaeifar, M. A., Kenny, A., Hainsworth, C., del Pino, V., del Valle Inclán, Y. et al. (2023). Life Cycle Assessment of Microalgae-Derived Biodiesel. The International Journal of Life Cycle Assessment, 28, 590-609. https://doi.org/10.1007/s11367-023-02140-6
Braun, J. C. A., & Colla, L. M. (2023). Use of Microalgae for the Development of Biofertilizers and Biostimulants. BioEnergy Research, 16, 289-310. https://doi.org/10.1007/s12155-022-10456-8
Castro, J. S., Ferreira, J., Magalhães, I. B., Jesus Junior, M. M., Marangon, B. B., Pereira, A. S. A. P. et al. (2023). Life Cycle Assessment and Techno-Economic Analysis for Biofuel and Biofertilizer Recovery as By-Products from Microalgae. Renewable and Sustainable Energy Reviews, 187, Article ID: 113781. https://doi.org/10.1016/j.rser.2023.113781
Cheirsilp, B., Maneechote, W., Srinuanpan, S., & Angelidaki, I. (2023). Microalgae as Tools for Bio-Circular-Green Economy: Zero-Waste Approaches for Sustainable Production and Biorefineries of Microalgal Biomass. Bioresource Technology, 387, Article ID: 129620. https://doi.org/10.1016/j.biortech.2023.129620
Chen, J., Li, J., Dong, W., Zhang, X., Tyagi, R. D., Drogui, P. et al. (2018). The Potential of Microalgae in Biodiesel Production. Renewable and Sustainable Energy Reviews, 90, 336-346. https://doi.org/10.1016/j.rser.2018.03.073
Chia, S. R., Ling, J., Chia, W. Y., Nomanbhay, S., Kurniawan, T. A., & Chew, K. W. (2023). Future Bioenergy Source by Microalgae-Bacteria Consortia: A Circular Economy Approach. Green Chemistry, 25, 8935-8949. https://doi.org/10.1039/d3gc02228e
Chong, J. W. R., Khoo, K. S., Chew, K. W., Ting, H., Iwamoto, K., Ruan, R. et al. (2024). Artificial Intelligence-Driven Microalgae Autotrophic Batch Cultivation: A Comparative Study of Machine and Deep Learning-Based Image Classification Models. Algal Research, 79, Article ID: 103400. https://doi.org/10.1016/j.algal.2024.103400
Chourasia, S., Tyagi, A., Pandey, S. M., Walia, R. S., & Murtaza, Q. (2022). Sustainability of Industry 6.0 in Global Perspective: Benefits and Challenges. MAPAN, 37, 443-452. https://doi.org/10.1007/s12647-022-00541-w
Corvellec, H., Stowell, A. F., & Johansson, N. (2022). Critiques of the Circular Economy. Journal of Industrial Ecology, 26, 421-432. https://doi.org/10.1111/jiec.13187
Costa, J. A. V., Zaparoli, M., Cassuriaga, A. P. A., Cardias, B. B., Vaz, B. d. S., Morais, M. G. d. et al. (2023). Biochar Production from Microalgae: A New Sustainable Approach to Wastewater Treatment Based on a Circular Economy. Enzyme and Microbial Technology, 169, Article ID: 110281. https://doi.org/10.1016/j.enzmictec.2023.110281
Diao, Y., Gong, X., Xu, D., Duan, P., Wang, S., & Guo, Y. (2024). From Culture, Harvest to Pretreatment of Microalgae and Its High-Value Utilization. Algal Research, 78, Article ID: 103405. https://doi.org/10.1016/j.algal.2024.103405
Dini, I. (2021). Bio Discarded from Waste to Resource. Foods, 10, Article No. 2652. https://doi.org/10.3390/foods10112652
Donkor, D., Tulashie, S. K., Helegah, F., Baidoo, E. B., Alale, E. M., Holdbrook, D. A. et al. (2025). Cocoa Byproduct Utilization in the Bioeconomy: A Review of Waste-to-Resource Strategies. Biofuels, 1-28. https://doi.org/10.1080/17597269.2025.2550911
Encarnação, T., da Graça Campos, M., & Mateus, A. (2023a). Introduction: Environmental Pollution and Biotechnological Solutions. In T. Encarnação, & A. Canelas Pais (Eds.), Marine Organisms : A Solution to Environmental Pollution ? Environmental Challenges and Solutions (pp. 1-4). Springer International Publishing. https://doi.org/10.1007/978-3-031-17226-7_1
Encarnação, T., Nicolau, N., Ramos, P., Silvestre, E., Mateus, A., Carvalho, T. A. d. et al. (2023b). Recycling Ophthalmic Lens Wastewater in a Circular Economy Context: A Case Study with Microalgae Integration. Materials, 17, Article No. 75. https://doi.org/10.3390/ma17010075
European Commission (2019). First Circular Economy Act ion Plan [WWW Document] . https://environment.ec.europa.eu/topics/circular-economy/first-circular-economy-action-plan_en
European Commission. Directorate General for Communication (2020). Circular Econ omy Action Plan : For a Cleaner and More Competiti ve Europe . Publications Office.
Fehrer, J. A., & Wieland, H. (2021). A Systemic Logic for Circular Business Models. Journal of Business Research, 125, 609-620. https://doi.org/10.1016/j.jbusres.2020.02.010
Fritz, A. (2025). From Waste to Resource: Systems Framework for Unconventional Critical Material Feedstocks . National Energy Technology Laboratory (NETL).
Greene, J. M., Quiroz, D., Limb, B. J., & Quinn, J. C. (2025). Geographically-Resolved Techno-Economic and Life Cycle Assessment Comparing Microalgae-Based Renewable Diesel and Sustainable Aviation Fuel in the United States. Environmental Science & Technology, 59, 3472-3483. https://doi.org/10.1021/acs.est.4c06742
Imamoglu, E. (2024). Artificial Intelligence and/or Machine Learning Algorithms in Microalgae Bioprocesses. Bioengineering, 11, Article No. 1143. https://doi.org/10.3390/bioengineering11111143
Johansson, N., Velis, C., & Corvellec, H. (2020). Towards Clean Material Cycles: Is There a Policy Conflict between Circular Economy and Non-Toxic Environment? Waste Management & Research: The Journal for a Sustainable Circular Economy, 38, 705-707. https://doi.org/10.1177/0734242x20934251
Kholssi, R., Ramos, P. V., Marks, E. A. N., Montero, O., & Rad, C. (2021). 2biotechnological Uses of Microalgae: A Review on the State of the Art and Challenges for the Circular Economy. Biocatalysis and Agricultural Biotechnology, 36, Article ID: 102114. https://doi.org/10.1016/j.bcab.2021.102114
Kirchherr, J., Reike, D., & Hekkert, M. (2017). Conceptualizing the Circular Economy: An Analysis of 114 Definitions. Resources, Conservation and Recycling, 127, 221-232. https://doi.org/10.1016/j.resconrec.2017.09.005
Kirchherr, J., Yang, N. N., Schulze-Spüntrup, F., Heerink, M. J., & Hartley, K. (2023). Conceptualizing the Circular Economy (Revisited): An Analysis of 221 Definitions. Res ources, Conservation and Recycling, 194, Article ID: 107001. https://doi.org/10.1016/j.resconrec.2023.107001
Kristensen, H. S., & Mosgaard, M. A. (2020). A Review of Micro Level Indicators for a Circular Economy—Moving Away from the Three Dimensions of Sustainability? Journal of Cleaner Production, 243, Article ID: 118531. https://doi.org/10.1016/j.jclepro.2019.118531
Kuech, A., Breuer, M., & Popescu, I. (2023). Research for PECH Committee — The Future of the EU Algae Sector . Policy Department for Structural and Cohesion Policies. European Parliament.
Kumari, S., Jamwal, R. A., Singh, N., Mishra, D. K., & Singh, D. K. (2020). Recent Developments in Environmental Mercury Bioremediation and Its Toxicity: A Review. Environmental Nanotechnology, Monitoring & Management, 13, Article ID: 100283. https://doi.org/10.1016/j.enmm.2020.100283
Lamba, H. K., Kumar, N. S., & Dhir, S. (2023). Circular Economy and Sustainable Development: A Review and Research Agenda. International Journal of Productivity and Performance Management, 73, 497-522. https://doi.org/10.1108/ijppm-06-2022-0314
Leong, W. H., Lim, J. W., Rawindran, H., Liew, C. S., Lam, M. K., Ho, Y. C. et al. (2023). Energy Balance and Life Cycle Assessments in Producing Microalgae Biodiesel via a Continuous Microalgal-Bacterial Photobioreactor Loaded with Wastewater. Chemosphere, 341 , Article ID: 139953. https://doi.org/10.1016/j.chemosphere.2023.139953
Ng, T. S. A., Mah, A. X. Y., & Zhao, K. (2024). Towards a Circular Economy with Waste‐to‐Resource System Optimization. Naval Research Logistics (NRL), 71, 553-574. https://doi.org/10.1002/nav.22163
Pacheco-Lopez, A., Somoza-Tornos, A., Graells, M., & Espuña, A. (2022). Integrated Synthesis, Modeling, and Assessment of Waste-to-Resource Alternatives. In Computer Aided Chemical Engineering (Vol. 51, pp. 787-792). Elsevier.
Pacheco-López, A., Somoza-Tornos, A., Graells, M., & Espuña, A. (2021). Synthesis and Assessment of Waste-to-Resource Routes for Circular Economy. Computers & Chemical Engineering, 153, Article ID: 107439. https://doi.org/10.1016/j.compchemeng.2021.107439
Santos, B., Freitas, F., Sobral, A. J. F. N., & Encarnação, T. (2025). Microalgae and Circular Economy: Unlocking Waste to Resource Pathways for Sustainable Development. International Journal of Sustainable Engineering, 18, Article ID: 2501488.
Shah, H. H., Amin, M., Pepe, F., & Tregambi, C. (2024). Sustainable Waste Management and Waste-to-Energy in the Context of a Circular Economy through Various Waste Management Technologies. Environmental Science and Pollution Research, 32, 27503-27522. https://doi.org/10.1007/s11356-024-33223-y
Tathavadekar, V. P., & Mahankale, N. R. (2025). Mycelial Network-Inspired Urban Waste-to-Resource Networks: Biomimetic Circular Economy Design for Indian Metro-Satellite Cities. Journal of Environmental Ecology, 1, 8-15. https://doi.org/10.64229/qc4vq347
You, S. (2022). Waste-to- Resource System Design for Low-Carbon Circular Eco nomy . Elsevier.