Publications

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de Rezende Locatel, W., dos Passos, J. S. & Biller, P. (2026). Kinetic Evaluation and Process Optimization Strategies for the Chemical Recycling of PET and PBT with Glass Fiber. ACS Sustainable Chemistry and Engineering, 14(1), 219-228. https://doi.org/10.1021/acssuschemeng.5c09347

Værbak, S., Moustaka, J., Smith, A. M. & Hestbjerg, H. (2026). Nye veje til alternative dyrkningssubstrater. Gartner Tidende, 2026(1), 32-33.

Martín-Gutiérrez, D., Barras, D., Suárez-Rodríguez, P., Biller, P., Schuck, C. E., Águeda, V. I. & Larriba, M. (2026). Solvent selection and optimisation of the liquid-liquid extraction of volatile fatty acids from the aqueous stream of the HTL-WO process for the production of aviation biofuels. Separation and Purification Technology, 390, Article 136923. https://doi.org/10.1016/j.seppur.2026.136923

Macêdo, W. V., Madsen, J. S., Schacksen, P., Sandeep, R., Nielsen, J. L., Biller, P. & Vergeynst, L. (2025). Aerobic biological treatment of hydrothermal liquefaction process water of sewage sludge: Nitrification inhibition and removal of hazardous pollutants. Water Research, 277, Article 123351. https://doi.org/10.1016/j.watres.2025.123351

Zoppi, G., Biller, P., Catalano, J. & Anastasakis, K. (2025). Batch and continuous pilot-scale hydrothermal liquefaction of food waste: kinetic modelling and response surface methodology optimization. Chemical Engineering Journal, 524, Article 168987. https://doi.org/10.1016/j.cej.2025.168987

Šáner, A., Ambye-Jensen, M., Jensen, S. K., Vorkamp, K., Ceccato, M. & Smith, A. M. (2025). Biochar produced from bio-refined herbaceous fibre residue for feed and technical purposes. Journal of Analytical and Applied Pyrolysis, 187, Article 107004. https://doi.org/10.1016/j.jaap.2025.107004

Matayeva, A., dos Passos, J. S., Straka, P., Skibsted, S. K. G. & Biller, P. (2025). Chemical recycling of post-consumer textile waste via continuous hydrothermal liquefaction and hydrotreatment for simultaneous monomer and hydrocarbons production. Chemical Engineering Journal, 508, Article 161108. https://doi.org/10.1016/j.cej.2025.161108

Schuck, C. E., Zoppi, G., Anastasakis, K. & Biller, P. (2025). Continuous wet oxidation of hydrothermal liquefaction aqueous phase: oxidant supply and integration potential. Biomass and Bioenergy, 202, Article 108192. https://doi.org/10.1016/j.biombioe.2025.108192

Ceragioli, G., Schuck, C. E., Zoppi, G., Pipitone, G., Anastasakis, K., Bensaid, S., Pirone, R. & Biller, P. (2025). Development of an integrated hydrothermal liquefaction and wet oxidation process: a pathway for an autothermal biorefinery. Journal of Cleaner Production, 521, Article 146242. https://doi.org/10.1016/j.jclepro.2025.146242

dos Passos, J. S., Skibsted, S. K. G. & Biller, P. (2025). Enhancing Recycling of Polyamide 6 and Polyethylene Multilayer Plastics through Sequential Hydrothermal Liquefaction. Energy and Fuels, 39(1), 571-576. https://doi.org/10.1021/acs.energyfuels.4c04589

Schuck, C. E., Chiaberge, S., Anastasakis, K. & Biller, P. (2025). Exothermicity study of wet oxidation of hydrothermal liquefaction aqueous phase using high-pressure differential scanning calorimetry. Carbon Resources Conversion, Article 100397. Advance online publication. https://doi.org/10.1016/j.crcon.2025.100397

Klüpfel, C., Yuan, B., Biller, P. & Herklotz, B. (2025). Hydrothermal liquefaction as a treatment technology for anaerobic digestate: A review. Renewable and Sustainable Energy Reviews, 210, Article 115156. https://doi.org/10.1016/j.rser.2024.115156

Rivas-Arrieta, M. J. & Biller, P. (2025). Influence of separation mechanism and position on char formation and characteristics in continuous hydrothermal liquefaction. Separation and Purification Technology, 375, Article 133859. https://doi.org/10.1016/j.seppur.2025.133859

Harisankar, S. & Biller, P. (2025). Kinetics and recovery of bisphenol-A from fiber-reinforced polycarbonate using subcritical water. Reaction Chemistry and Engineering, 10(12), 2835-2848. https://doi.org/10.1039/d5re00291e

Hussain, A., Thoning Hvass Søgaard, B. & Anastasakis, K. (2025). Opportunities of Coupling Hydrothermal Liquefaction with Wet Oxidation: Significance of Appropriate Thermodynamic Model Selection in Process Modeling. Proceedings, 121(1), Article 7. https://doi.org/10.3390/proceedings2025121007

Neha, S., Nguyen, M., Vergeynst, L. & Biller, P. (2025). PFAS destruction through catalyzed hydrothermal liquefaction using modified hydrochar. Journal of Water Process Engineering, 72, Article 107606. https://doi.org/10.1016/j.jwpe.2025.107606

Nizami, M. & Anastasakis, K. (2025). Sustainable Aviation Fuels Production via Biogas Reforming and Fischer-Tropsch Integrated with Solid Oxide Electrolysis. Systems and Control Transactions, 4, 2146-2151. https://doi.org/10.69997/sct.180215

Hussain, A. & Anastasakis, K. (2025). Technoeconomic evaluation of integrating hydrothermal liquefaction in wastewater treatment plants. Bioresource Technology, 419, Article 132030. https://doi.org/10.1016/j.biortech.2024.132030

Smith, A. M. & Anastasakis, K. (2025). Thermochemical Conversion of Biomass. In Bioprocesses: A Comprehensive Guide to Sustainable Resources in the Non-Fossil Era (pp. 359-385). Cambridge University Press. https://doi.org/10.1017/9781108950831.011

Zhou, M., Usack, J. G., Smith, A. M. & Angenent, L. T. (2025). Toxicity and biodegradation of two different hydrothermal liquefaction process waters for anaerobic digestion and the effect of microaeration. Chemical Engineering Journal, 520, Article 165540. https://doi.org/10.1016/j.cej.2025.165540

Maqbool, W., Biller, P. & Anastasakis, K. (2024). A kinetic process model for sewage sludge hydrothermal liquefaction in Aspen Plus: Model validation with pilot-plant data and scale up. Energy Conversion and Management, 302, Article 118136. https://doi.org/10.1016/j.enconman.2024.118136

Macêdo, W. V., Harpøth, R. D., Poulsen, J. S., de Jonge, N., Fischer, C. H., Agneessens, L. M., Nielsen, J. L., Biller, P., Rickers, C. K. & Vergeynst, L. (2024). Anaerobic digestion of wastewater from hydrothermal liquefaction of sewage sludge and combined wheat straw-manure. Bioresource Technology, 399, Article 130559. https://doi.org/10.1016/j.biortech.2024.130559

Aslanoglou, I., Anastasakis, K., Michalopoulos, C., Marcoulaki, E. & Kokossis, A. (2024). A systems approach to model nonconventional streams applied to biocrude production from hydrothermal liquefaction. Computer Aided Chemical Engineering, 53, 1177-1182. https://doi.org/10.1016/B978-0-443-28824-1.50197-6

Silva Thomsen, L. B., Carregosa, J. D. C., Wisniewski, A., Anastasakis, K. & Biller, P. (2024). Continuous wet air oxidation of aqueous phase from hydrothermal liquefaction of sewage sludge. Journal of Environmental Chemical Engineering, 12(3), Article 112672. https://doi.org/10.1016/j.jece.2024.112672

Wen, J., Neha, S., Biller, P., Kristensen, K. & Vergeynst, L. (2024). Detection of volatile hydroperfluoroalkanes during hydrothermal liquefaction of perfluoroalkyl carboxylic acids at circumneutral pH. Journal of Hazardous Materials, 476, Article 134955. https://doi.org/10.1016/j.jhazmat.2024.134955

Neha, S., Vergeynst, L. & Biller, P. (2024). Evaluating hydrothermal liquefaction hydrochar from sewage sludge as a phosphorus resource through struvite production. Journal of Environmental Chemical Engineering, 12(3), Article 113014. https://doi.org/10.1016/j.jece.2024.113014

Simoni, G., Cheali, P., Roslev, P., Haasler, S., Reitzel, K., Smith, A. M., Haferbier, M. H. S. & Christensen, M. L. (2024). Flocculating and dewatering of lake sediment: An in-situ pilot study comparing synthetic polymers and biopolymers for restoring lake water quality and reusing phosphorus. Science of the Total Environment, 913, Article 169597. https://doi.org/10.1016/j.scitotenv.2023.169597

Hashemi, F., Mogensen, L., Smith, A. M., Ugilt Larsen, S. & Knudsen, M. T. (2024). Greenhouse gas emissions from bio-based growing media: A life-cycle assessment. Science of the Total Environment, 907, Article 167977. https://doi.org/10.1016/j.scitotenv.2023.167977

Pelosin, P., Longhin, F., Hansen, N. B., Lamagni, P., Drazevic, E., Benito, P., Anastasakis, K. & Catalano, J. (2024). High-temperature high-pressure electrochemical hydrogenation of biocrude oil. Renewable Energy, 222, Article 119899. https://doi.org/10.1016/j.renene.2023.119899

Rivas-Arrieta, M. J., Torri, C., Rombolà, A. G. & Biller, P. (2024). Hydrochar fractionation and composition in batch and continuous hydrothermal liquefaction. Biomass and Bioenergy, 183, Article 107166. https://doi.org/10.1016/j.biombioe.2024.107166

Hu, Y., Taghizadeh-Toosi, A., Kagendra, K. R. ., Smith, A. M., Nidal, K. & Sommer, S. G. (2024). Hydrochar from dairy sludge as phosphorus fertiliser affects greenhouse gas emissions and maize yield. Acta Agriculturae Scandinavica, Section B - Soil & Plant Science, 74(1), Article 2310276. https://doi.org/10.1080/09064710.2024.2310276

Acosta, A. C., Arias, C. A., Biller, P., Wittig, N. K., Baragau, I. A., Alhnidi, M. J., Ravenni, G., Sárossy, Z., Benedini, L., Abramiuc, L. E., Popescu, D. G., Negassa, W., Marulanda, V. F., Müller-Stöver, D. S. & Brix, H. (2024). Hydrothermal carbonization and pyrolysis in wetland engineering: Carbon sequestration, phosphorus recovery, and structural characterization of willow-based chars with X-ray μ-computed tomography. Chemical Engineering Journal, 492, Article 151916. https://doi.org/10.1016/j.cej.2024.151916

dos Passos, J. S., Lorentz, C., Laurenti, D., Royer, S. J., Chontzoglou, I. & Biller, P. (2024). Hydrothermal liquefaction of plastic marine debris from the North Pacific Garbage Patch. Resources, Conservation and Recycling, 209, Article 107822. https://doi.org/10.1016/j.resconrec.2024.107822

Silva Thomsen, L. B., Anastasakis, K. & Biller, P. (2024). Hydrothermal liquefaction potential of wastewater treatment sludges: Effect of wastewater treatment plant and sludge nature on products distribution. Fuel, 355, Article 129525. https://doi.org/10.1016/j.fuel.2023.129525

Ravenni, G., Thomsen, T. P., Smith, A. M., Ambye-Jensen, M., Rohde-Nielsen, K. T. & Henriksen, U. B. (2024). Integration of a drying and pyrolysis system in a green biorefinery: biochar product quality and impacts on the overall energy balance and climate footprint. Biomass Conversion and Biorefinery, 14(20), 25143-25159. https://doi.org/10.1007/s13399-023-04877-4

Hashemi, F., Mogensen, L., Smith, A. M., Ugilt Larsen, S. & Knudsen, M. T. (2024). Life cycle assessment of peat substitutes: sustainability of Danish growing media. Abstract from 14th International Conference on Life Cycle Assessment of Food 2024 (LCA Food 2024), Barcelona, Spain.

Acosta, A. C., Arias, C. A., Biller, P., Sørensen, P., Marulanda, V. F. & Brix, H. (2024). Optimizing resource efficiency through hydrothermal carbonization and engineered wetland systems: A study on carbon sequestration and phosphorus recovery potential. Journal of Cleaner Production, 442, Article 140962. https://doi.org/10.1016/j.jclepro.2024.140962

Tito, E., dos Passos, J. S., Rombolà, A. G., Torri, C., Bensaid, S., Pirone, R. & Biller, P. (2024). Sequential hydrothermal dechlorination and liquefaction of PVC. Energy Conversion and Management, 304, Article 118228. https://doi.org/10.1016/j.enconman.2024.118228

Zoppi, G., Andrade, T. A., Ward, A. J., Ambye-Jensen, M. & Biller, P. (2023). Biorefinery integration of a green protein platform for maximum resource utilization. Cleaner and Circular Bioeconomy, 6, Article 100064. https://doi.org/10.1016/j.clcb.2023.100064

Šiman, M., Krupka, V., Kejla, L., Straka, P., Schulzke, T., dos Passos, J. S., Biller, P. & Auersvald, M. (2023). Crucial correction of the Faix method for the determination of carbonyls in pyrolysis and hydrothermal liquefaction bio-oils with high nitrogen content. Journal of Analytical and Applied Pyrolysis, 173, Article 106086. https://doi.org/10.1016/j.jaap.2023.106086

Matayeva, A., Madsen, A. S. & Biller, P. (2023). Evaluation of different fiber impurities on hydrothermal liquefaction of mixed textile waste. Resources, Conservation & Recycling, 190, Article 106833. https://doi.org/10.1016/j.resconrec.2022.106833

Klüpfel, C., Herklotz, B. & Biller, P. (2023). Influence of processing conditions and biochemical composition on the hydrothermal liquefaction of digested urban and agricultural wastes. Fuel, 352, Article 129016. https://doi.org/10.1016/j.fuel.2023.129016

Macêdo, W. V., Schmidt, J. S., Jensen, S. B., Biller, P. & Vergeynst, L. (2023). Is nitrification inhibition the bottleneck of integrating hydrothermal liquefaction in wastewater treatment plants? Journal of Environmental Management, 348, Article 119046. https://doi.org/10.1016/j.jenvman.2023.119046

Tito, E., dos Passos, J. S., Bensaid, S., Pirone, R. & Biller, P. (2023). Multilayer plastic film chemical recycling via sequential hydrothermal liquefaction. Resources, Conservation & Recycling, 197, Article 107067. https://doi.org/10.1016/j.resconrec.2023.107067

Mendanha dos Santos, T., Zhou, R., Ottosen, C.-O., Smith, A. M., Schluttenhofer, S. S., Sørensen, I. U. & Larsen, S. U. (2023). Predicting robustness of growing media blends for horticultural crops created from renewable constituents. Poster session presented at I International Symposium on Growing Media, Compost Utilization and Substrate Analysis for Soilless Cultivation, Quebec city, Canada.

Schuck, C. E., Schäfer, T. & Anastasakis, K. (2023). Predictive Modeling and scale-up of Wet Oxidation for Hydrothermal Liquefaction Process Water treatment. In A. C. Kokossis, M. C. Georgiadis & E. Pistikopoulos (Eds.), 33rd European Symposium on Computer Aided Process Engineering (Vol. 52, pp. 2229-2234). Elsevier. https://doi.org/10.1016/B978-0-443-15274-0.50355-3

Smith, A. M., Sommer, S. G. & Taghizadeh-Toosi, A. (2023). Reduced Climate Impacts of Dairy Sludge Management by Introducing Hydrothermal Carbonization. Clean Energy and Sustainability, 1(1), Article 10003. https://doi.org/10.35534/ces.2023.10003

Souza dos Passos, J., Straka, P., Auersvald, M. & Biller, P. (2023). Upgrading of hydrothermal liquefaction biocrudes from mono- and co-liquefaction of cow manure and wheat straw through hydrotreating and distillation. Chemical Engineering Journal, 452(Part 4), Article 139636. https://doi.org/10.1016/j.cej.2022.139636

Shokrollahi, F., Lau, K. K., Partoon, B. & Smith, A. M. (2022). A review on the selection criteria for slow and medium kinetic solvents used in CO₂ absorption for natural gas purification. Journal of Natural Gas Science and Engineering, 98, Article 104390. https://doi.org/10.1016/j.jngse.2021.104390

Ugilt Larsen, S., Hinge, J., Knudsen, M. T., Hashemi, F., Zhou, R., Mendanha dos Santos, T., Smith, A. M. & Erik Lanng, S. (2022). Biobaserede vækstsubstrater: Analyse af klimaaftryk og produktionsomkostninger. Gartner Tidende. file:///C:/Users/hvst/Downloads/Klimaaftryk%20og%20produktionsomkostninger%20&%238211%3B%20artikel%20i%20Gartner%20Tidende.pdf

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Revised 13.11.2025

Morten Ambye-Jensen