The "Anchor Tenant" Model: Biofuel Refineries as Hubs for Industrial Symbiosis

June 24, 2026

Print This Article Share it With Friends

by Solomon Tekle Rikitu* (Advanced Biofuels USA) The transition to a low-carbon economy requires more than replacing fossil fuels with renewable alternatives. Many industrial sectors still operate in isolation, generating waste heat, CO₂, and by-products that are often discarded despite their potential value. This fragmented approach increases resource consumption, emissions, and production costs (Liu et al., 2024).

Industrial symbiosis offers a solution by connecting industries through the exchange of energy, materials, water, and by-products (Santhappan, et al., 2025, Rodríguez, et al., 2024 Tian, et al., 2022). By processing renewable biomass while supplying energy and valuable co-products, biofuel refineries become central hubs that support circular resource flows and accelerate industrial decarbonization (Brandt, et al., 2022).

Biofuel Refineries as Anchor Facilities

The anchor tenant concept originates from economic development and industrial park planning, where a major facility attracts complementary businesses and infrastructure investments (Liu et al., 2024). In the bioeconomy, biofuel refineries can perform this role because they continuously process large quantities of biomass and generate multiple outputs.

Modern biorefineries convert agricultural residues, forestry waste, municipal organic waste, and dedicated energy crops into transportation fuels, electricity, heat, and biobased materials. Through technologies such as gasification, anaerobic digestion, fermentation, pyrolysis, and hydrothermal processing, these facilities transform low-value biomass into marketable products (Mary et al., 2025).

Unlike conventional fuel production systems, biorefineries generate several co-products simultaneously, including process heat, renewable electricity, captured biogenic CO2, digestate, biochar, lignin-rich residues, and nutrient streams. These outputs create opportunities for collaboration with neighboring industries, making the biorefinery an ideal anchor for industrial symbiosis networks.

Building Industrial Symbiosis Linkages

The success of the anchor tenant model depends on establishing exchanges between the refinery and surrounding industries. Rather than operating independently, facilities become connected through material and energy flows that improve overall resource efficiency.

Biofuel production frequently generates excess heat and electricity through combined heat and power (CHP) systems (Yan & Salman, 2023). Nearby manufacturers, food processors, greenhouses, and district heating networks can utilize this energy, reducing reliance on fossil fuels and lowering operating costs.

a. Carbon Dioxide Utilization

Biogenic CO2 released during fermentation, gasification, or biomass conversion can be captured and supplied to neighboring industries (Gueddari et al., 2025; Santha pan, et al., 2025). Potential users include greenhouses, beverage manufacturers, chemical producers, and emerging carbon utilization facilities that convert CO2 into fuels, chemicals, or construction materials.

b. Residue and Co-Product Recovery

Organic residues from biorefineries can support multiple industrial activities (Mary et al., 2025). Digestate can be returned to agriculture as fertilizer, biochar can be applied for carbon sequestration and soil improvement, and lignin-rich streams can serve as feedstocks for advanced materials and chemicals. These exchanges reduce waste disposal requirements while creating additional revenue streams.

c. Utility and Infrastructure Sharing

Industrial clusters can share water treatment systems, storage facilities, transportation networks, steam distribution systems, and renewable energy infrastructure. Such cooperation reduces capital investment requirements and improves regional competitiveness.

Expanding the System Boundary

Traditional assessments often evaluate a biofuel refinery as a standalone facility (Yan & Salman, 2023). However, the anchor tenant model requires a broader perspective (Liu et al., 2024). Instead of focusing on a single plant, the system boundary expands to include multiple interconnected industries. Material, energy, carbon, and water flows are evaluated across the entire network (Tian, et al., 2022). In this configuration, waste from one facility becomes a resource for another, creating cascading resource utilization pathways.

This network perspective can reveal benefits that are not visible in conventional facility level analyses. For example, excess heat from a refinery may reduce natural gas consumption at a nearby factory, while captured CO2 may support low-carbon fuel production elsewhere in the cluster (Gueddari et al., 2025). The cumulative impact often exceeds the benefits achieved by individual facilities acting independently.

Environmental and Economic Benefits

The anchor tenant approach offers significant environmental advantages. By promoting resource sharing and co-product utilization, industrial symbiosis can reduce greenhouse gas emissions, decrease landfill disposal, improve energy efficiency, and support circular carbon management.

Economic benefits are equally important. Shared infrastructure lowers capital expenditures, while co-product markets create additional revenue streams. Increased resource efficiency can improve profitability and reduce operational risks associated with energy and feedstock price volatility (Mohtashami et al. (2026).

For rural regions, biofuel-centered industrial clusters may also stimulate economic development by creating jobs, attracting investment, and strengthening local supply chains. The result is a more resilient and diversified bioeconomy.

Challenges to Implementation

Despite its potential, the anchor tenant model faces several challenges.

First, industrial symbiosis requires geographic proximity between participating facilities. Transportation costs can limit the feasibility of exchanging heat, residues, and other low-value streams over long distances.

Second, successful collaboration depends on coordination among multiple stakeholders with different business objectives. Establishing long-term agreements for resource exchanges can be complex.

Third, regulatory frameworks are often designed for individual facilities rather than interconnected industrial networks. Policies governing waste classification, carbon accounting, and infrastructure ownership may create barriers to implementation.

Finally, investment decisions must consider uncertainty in biomass supply, market demand, technology performance, and policy incentives.

Future Outlook

Growing interest in circular economy strategies, carbon management, and regional decarbonization is increasing attention on industrial symbiosis. Advances in digital monitoring, carbon capture technologies, and integrated energy systems are making multi-industry networks more feasible and economically attractive.

Future biofuel refineries are likely to evolve from standalone fuel producers into multifunctional resource hubs that provide renewable fuels, energy, carbon management services, and biobased materials. As sustainable aviation fuel (SAF), renewable fuels, and carbon utilization technologies continue to expand, the role of biofuel refineries as anchor tenants may become increasingly important in achieving net-zero industrial systems.

Key points to be considered for the future

The anchor tenant model positions biofuel refineries as the central infrastructure of industrial symbiosis networks. By processing biomass and supplying fuels, energy, CO2, and valuable co-products, these facilities can connect multiple industries within a circular resource system. While challenges related to infrastructure, coordination, and policy remain, the model offers a promising pathway for improving resource efficiency, reducing emissions, and strengthening the economic viability of the emerging bioeconomy.

References

Brandt, K., Camenzind, D., Zhu, J., Latta, G., Gao, J., & Wolcott, M., 2022. Methodology for quantifying the impact of repurposing existing manufacturing facilities: Case study using pulp and paper facilities for sustainable aviation fuel production. Biofuels, Bioproducts and Biorefining, 16(5), 1227–1239. https://doi.org/10.1002/bbb.2369

Gueddari, A., Alonso-Moreno, C., Canales-Vázquez, J., & García-Yuste, S. (2025). Evaluating the integration of biogenic CO₂ from alcoholic fermentation in carbon dioxide utilization (CDU) strategies: A comprehensive assessment. Journal of CO₂ Utilization. https://doi.org/10.1016/j.jcou.2025.103094

Liu, C. H., Rosenthal, S. S., & Strange, W. C. (2025). Agglomeration economies and the built environment: Evidence from specialized buildings and anchor tenants. Journal of Urban Economics. https://doi.org/10.1016/j.jue.2024.103655

Mary, H., Subramanian, D., & Pandian, S. (2025). Utilization of agricultural residues in biofuels and bioenergy production through biorefinery routes. In Biorefinery and Circular Bioeconomy Approaches (pp. 63–84). Woodhead Publishing. https://doi.org/10.1016/B978-0-443-29254-5.00004-7

Mohtashami, R., Rita S, Jérôme F, Dirk M., 2026. We May Be Retrofitting Wrong: How LCA

Exposes Hidden Trade-offs of Carbon Footprint and Costs of Optimal Energy Retrofitting Upgrades. Journal of Building Engineering. https://doi.org/10.1016/j.jobe.2026.115941

Rodríguez, R., Ormazabal, C., 2024. Mapping sustainability assessment methods through the industrial symbiosis life cycle for a circular economy. Sustain. Prod. Consum. https://doi.org/10.1016/j.spc.2024.08.005

Santhappan J., Beno W., Thangavel M., 2025. Integration of bioenergy in industrial symbiosis and the assessment of its environmental and life cycle impact for circular energy transition. Energy Convers. Manage. https://doi.org/10.1016/j.enconman.2025.120376

Tian, P., Lu, H., Heijungs, R., Li, D., Zhang, K., & Yang, Y. 2022. Water-energy-carbon nexus in China's intra- and inter-regional trade. Science of the Total Environment, 806(2), 150666. https://doi.org/10.1016/j.scitotenv.2021.150666

Yan, J., & Salman, C. A. (2023). From standalone WtE processes to waste-integrated biorefineries. In Waste Biorefineries: Advanced design concepts for integrated waste to energy processes (pp. 77–104). Elsevier. https://doi.org/10.1016/B978-0-323-91761-2.00007-6

*Solomon Tekle Rikitu is a PhD student at National Chung Hsing University (Taiwan), focusing on net-zero industrial systems and sustainable decarbonization pathways. His research integrates industrial symbiosis with CO₂ capture, utilization, and conversion (CO₂RR), emphasizing system-level CO₂ mitigation and resource valorization. He applies life cycle assessment (LCA) and techno-economic analysis (TEA), including extended TEA (eTEA), to evaluate environmental impacts, economic feasibility (CAPEX/OPEX), carbon pricing sensitivity, and CO₂ as a feedstock within emerging circular carbon systems.

Related articles