Economics Working Papers 2023, 7(2):5-46 | DOI: 10.32725/ewp.2023.002520

Food Waste Management via Insect Production in the Perspective of Circular Bioeconomy

Maroušková Anna

The amount of different types of waste around the world is growing every year. Especially a growing amount of food waste is in desperate need of better management practices. At the same time, European Union (EU) is striving for becoming the world's first climate-neutral continent which requires immediate solutions for issues like waste management, sustainable production, competitive resource-efficient business models, etc. For achieving these goals, business models fulfilling principles of circular bioeconomy are highly supported by the EU. One of such business models could be the rearing of Black Soldier Larvae (BSF) on various types of biowaste and their use for value-added products like animal feed, fertilizers, biofuel, cosmetic ingredients, etc. This study reviews adopted Bioeconomy strategies and investigates the state of the research and development in the field of BSF rearing through statistical analysis of the available scientific publications, published patents, and established companies in the EU and European Free Trade Association (EFTA) Member states. The results show an exponential increase in all three indicators in the last decade.

Keywords: bioeconomy, biowaste, circular economy, insect production, sustainability
JEL classification: O13, Q01, Q57

Received: June 12, 2023; Revised: June 12, 2023; Published: June 12, 2023  Show citation

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Maroušková, A. (2023). Food Waste Management via Insect Production in the Perspective of Circular Bioeconomy. Economics Working Papers, 7(2), 5-46. doi: 10.32725/ewp.2023.002
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    References

    1. AGUILAR, A., TWARDOWSKI, T., WOHLGEMUTH, R. 2019. Bioeconomy for sustainable development. Biotechnology Journal, 14(8), 1800638. Go to original source...
    2. ALLAIN, S., RUAULT, J. F., MORAINE, M., MADELRIEUX, S. 2022. The 'bioeconomic vs bioeconomy'debate: Beyond criticism, advancing research fronts. Environmental Innovat and Societal Transitions, 42, 58-73. Go to original source...
    3. ALLWOOD, J. M. 2014. Squaring the circular economy: the role of recycling within a hierarchy of material management strategies. In Handbook of recycling, pp. 445-477. Elsevier. Go to original source...
    4. ARAYA, M. N. 2018. A review of effective waste management from an EU, national, and local perspective and its influence: The management of biowaste and anaerobic digestion of municipal solid waste. Journal of Environmental Protection, 9(6), 652-670. Go to original source...
    5. AUZA, F. A., PURWANTI, S., SYAMSU, J. A., NATSIR, A. 2020. Antibacterial activities of black soldier flies (Hermetia illucens. l) extract towards the growth of Salmonella typhimurium, E. coli and Pseudomonas aeruginosa. In IOP Conference Series: Earth and Environmental Science. 492(1), 012024. Go to original source...
    6. AGOVINO, M., MATRICANO, D., GAROFALO, A. 2020. Waste management and competitiveness of firms in Europe: A stochastic frontier approach. Waste Management, 102, 528-540. Go to original source...
    7. BAKKER, C. A., DEN HOLLANDER, M. C., VAN HINTE, E., ZIJLSTRA, Y. 2014. Products that last: Product design for circular business models. TU Delft Library.
    8. BARAÑANO, L., GARBISU, N., ALKORTA, I., ARAUJO, A., GARBISU, C. 2021. Contextualization of the bioeconomy concept through its links with related concepts and the challenges facing humanity. Sustainability, 13(14), 7746. Go to original source...
    9. BARRAGAN-FONSECA, K. B., DICKE, M., VAN LOON, J. J. 2017. Nutritional value of the black soldier fly (Hermetia illucens L.) and its suitability as animal feed-a review. Journal of Insects as Food and Feed, 3(2), 105-120. Go to original source...
    10. BARRAGAN-FONSECA, K. Y., BARRAGAN-FONSECA, K. B., VERSCHOOR, G., VAN LOON, J. J., DICKE, M. 2020. Insects for peace. Current Opinion in Insect Science, 40, 85-93. Go to original source...
    11. BELLUCO, S., HALLORAN, A., RICCI, A. 2017. New protein sources and food legislation: the case of edible insects and EU law. Food Security. 9, 803-814 Go to original source...
    12. BIC. 2019. Bioindustrial Innovation Canada. Canada's bioeconomy strategy: leveraging our strengths for a sustainable future.
    13. BIOECONOMY A STRATEGY FOR AUSTRIA. 2019. Federal Ministry for Sustainability and Tourism, Federal Ministry for Transport, Innovation and Technology Federal Ministry, Federal Ministry of Education, Science and Research. Vienna.
    14. BIRNER, R. 2018. Bioeconomy concepts. In: LEWANDOWSKI, I. (eds) Bioeconomy, pp. 17-38. Springer, Cham. ISBN 978-3-319-68152-8 Go to original source...
    15. BIT II. (2019). A New Bioeconomy Strategy for a Sustainable Italy. Presidency of Council of Ministers, Italy.
    16. BMBF. 2020. National Bioeconomy Strategy. Bundesministerium für Bildung und Forschung/Federal Ministry of Education and Research, Division "Sustainable Economy; Bio-Economy". Berlin, Germany.
    17. BOCKEN, N. M., DE PAUW, I., BAKKER, C., VAN DER GRINTEN, B. 2016. Product design and business model strategies for a circular economy. Journal of industrial and production engineering, 33(5), 308-320. Go to original source...
    18. BONAIUTI, M. 2014. Bioeconomics. In: D'ALISA G, DEMATIA F, KALLIS G (eds) Degrowth: A vocabulary for a new era. Routledge/Taylor & Francis Group, Abingdon/Oxon, pp.52-55.
    19. BOULDING, K. E. 2013. The economics of the coming spaceship earth. In Environmental quality in a growing economy, pp. 3-14. RFF Press.
    20. CAPPELLOZZA, S., LEONARDI, M. G., SAVOLDELLI, S., CARMINATI, D., RIZZOLO, A., CORTELLINO, G.... TETTAMANTI, G. 2019. A first attempt to produce proteins from insects by means of a circular economy. Animals, 9(5), 278. Go to original source...
    21. CAMPBELL-JOHNSTON, K., VERMEULEN, W. J., REIKE, D., BRULLOT, S. 2020. The circular economy and cascading: towards a framework. Resources, Conservation & Recycling: X, 7, 100038. Go to original source...
    22. CBAC. 2005. Canadian Biotechnology Advisory Committee. Annual Report, Government of Canada. https://publications.gc.ca/collections/Collection/Iu195-2005E.pdf
    23. CLOETE, T. E., NEL, L. H., THERON, J. 2006. Biotechnology in South Africa. TRENDS in Biotechnology, 24(12), 557-562. Go to original source...
    24. CORTES O., J.A., RUIZ, A.T., MORALES-RAMOS, J.A., THOMAS, M., ROJAS, M.G., TOMBERLIN, J.K., YI, L., HAN, R., GIROUD, L., JULLIEN, R. L. 2016. Chapter 6-Insect Mass Production Technologies. In Insects as Sustainable Food Ingredients
    25. DOSSEY, A.T., MORALES-RAMOS, J.A., ROJAS, M.G., Eds.; Academic Press: San Diego, CA, USA, 2016; pp. 153-201. ISBN 978-0-12-802856-8.
    26. CORVELLEC, H., STOWELL, A. F., JOHANSSON, N. 2022. Critiques of the circular economy. Journal of Industrial Ecology, 26(2), 421-432. Go to original source...
    27. CROUX, C., DEHON, C. 2010. Influence functions of the Spearman and Kendall correlation measures. Statistical methods & applications, 19(4), 497-515. Go to original source...
    28. CRS. 2022. The Bioeconomy: A Primer. Congressional Research Service. R46881. Version 3, updated.
    29. CUDLÍNOVÁ, E., LAPKA, M., VÁVRA, J. 2017. Bio-economy as a New Perspective for Solving Climate Change?. The Role of Integrity in the Governance of the Commons: Governance, Ecology, Law, Ethics, 155-166. Go to original source...
    30. DEAN, C., LAWLESS, J.F. 1989. Tests for Detecting Overdispersion in Poisson Regression Models. Journal of the American Statistical Association. 84(406), 467-472. Go to original source...
    31. DI MARIA, F., SISANI, F., CONTINI, S. 2018. Are EU waste-to-energy technologies effective for exploiting the energy in bio-waste? Applied Energy, 230, 1557-1572. Go to original source...
    32. EC. 2012. Directorate-General for Research and Innovation, Innovating for sustainable growth: a bioeconomy for Europe. European Commission, Publications Office.
    33. https://data.europa.eu/doi/10.2777/6462
    34. EC. 2018. DIRECTIVE (EU) 2018/851 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 May 2018 amending Directive 2008/98/EC on waste. Official Journal of the European Union. http://data.europa.eu/eli/dir/2018/851/oj
    35. EC. 2020. A new circular economy action plan for a cleaner and more competitive Europe. European Commission. https://eur-lex. europa. eu/legalcontent/EN/TXT
    36. ELMI, A., AL-HARBI, M., YASSIN, M. F., AL-AWADHI, M. M. 2021. Modeling gaseous emissions and dispersion of two major greenhouse gases from landfill sites in arid hot environment. Environmental Science and Pollution Research, 28, 15424-15434. Go to original source...
    37. EU. 2000. Lisbon European Council 23 and 24 March 2000 - Presidency Conclusions. Council of the European Union Lisbon. https://www.europarl.europa.eu/summits/lis1_en.htm
    38. EUROSTAT. (2020). https://ec.europa.eu/eurostat/en/web/products-eurostat-news/-/ddn-20220925-2
    39. FAO. 2021. The State of Food and Agriculture 2021. Making agrifood systems more resilient to shocks and stresses. Rome, FAO.
    40. FAO, IFAD, UNICEF, WFP and WHO. 2021. The State of Food Security and Nutrition in the World 2021. Transforming food systems for food security, improved nutrition and affordable healthy diets for all. Rome, FAO.
    41. FOWLES, T. M., NANSEN, C. 2020. Insect-based bioconversion: value from food waste. In Food waste management, pp. 321-346. Palgrave Macmillan, Cham Go to original source...
    42. GEISSDOERFER, M., SAVAGET, P., BOCKEN, N. M., HULTINK, E. J. 2017. The Circular Economy-A new sustainability paradigm?. Journal of cleaner production, 143, 757-768. Go to original source...
    43. GEORGESCU-ROEGEN, N. 1971. The Entropy Law and the Economic Process. ISBN 9780674281653 Go to original source...
    44. GHISELLINI, P., CIALANI, C., ULGIATI, S. 2016. A review on circular economy: the expected transition to a balanced interplay of environmental and economic systems. Journal of Cleaner production, 114, 11-32. Go to original source...
    45. GHISELLINI, P., RIPA, M., ULGIATI, S. 2018. Exploring environmental and economic costs and benefits of a circular economy approach to the construction and demolition sector. A literature review. Journal of Cleaner Production, 178, 618-643. Go to original source...
    46. GROSSULE, V., ZANATTA, S., MODESTI, M., LAVAGNOLO, M. C. 2023. Treatment of food waste contaminated by bioplastics using BSF larvae: Impact and fate of starch-based bioplastic films. Journal of Environmental Management, 330, 117229. Go to original source...
    47. HALLORAN, A., ROOS, N., EILENBERG, J., CERUTTI, A., BRUUN, S. 2016. Life cycle assessment of edible insects for food protein: a review. Agronomy for Sustainable Development, 36(4), 1-13. Go to original source...
    48. HLPE, 2014. Food losses and waste in the context of sustainable food systems. A report by the High Level Panel of Experts on Food Security and Nutrition of the Committee on World Food Security, Rome 2014.
    49. HUANG, Y., FAN, G. 2016. Engineering geological analysis of municipal solid waste landfill stability. Natural Hazards, 84(1), 93-107. Go to original source...
    50. IICA. 2018. 2018-2022 Medium-term Plan. Inter-American Institute for Cooperation on Agriculture - San Jose, Costa Rica. ISBN: 978-92-9248-802-4
    51. IPIFF. 2021. International Platform of Insects for Food and Feed. Briefing paper on the provisions relevant to the commercialisation of insect-based products intended for human consumption in the EU. Regulation (EU) 2015/2283 on novel foods, Brussels.
    52. JAWAHIR, I. S., BRADLEY, R. 2016. Technological elements of circular economy and the principles of 6R-based closed-loop material flow in sustainable manufacturing. Procedia CIRP, 40, 103-108. Go to original source...
    53. JENSEN, H., ELLEBY, C., DOMÍNGUEZ, I.P., CHATZOPOULOS, T., CHARLEBOIS, P., 2021. Insect-based protein feed: from fork to farm. Journal of Insects as Food and Feed, 7(8), pp.1219-1233. Go to original source...
    54. JØRGENSEN, M. S., REMMEN, A. 2018. A methodological approach to development of circular economy options in businesses. Procedia CIRP, 69, 816-821. Go to original source...
    55. KIRCHHERR, J., REIKE, D., HEKKERT, M. 2017. Conceptualizing the circular economy: An analysis of 114 definitions. Resources, conservation and recycling, 127, 221-232. Go to original source...
    56. KORHONEN, J., HONKASALO, A., SEPPÄLÄ, J. 2018a. Circular economy: the concept and its limitations. Ecological economics, 143, 37-46. Go to original source...
    57. KORHONEN, J., NUUR, C., FELDMANN, A., BIRKIE, S. E. 2018b. Circular economy as an essentially contested concept. Journal of cleaner production, 175, 544-552. Go to original source...
    58. KOTOB, G., SLUCZANOWSKI, N., SIDDIQUI, S. A., TOME, N. M., DALIM, M., VAN DER RAAD, P.... PAUL, A. 2022. Potential application of black soldier fly fats in canine and feline diet formulations: A review of literature. Journal of Asia-Pacific Entomology, 101994. Go to original source...
    59. KUMAGAI, S. 2022. BCG (Bio-Circular-Green) economy in Thailand. RIM. Pacific Business and Industries. XXII(84), 2 - 31.
    60. KUZUHARA, Y. 2005. Biomass Nippon strategy-why "biomass Nippon" now?. Biomass and bioenergy, 29(5), 331-335. Go to original source...
    61. LANG, C. 2022. Bioeconomy-from the Cologne paper to concepts for a global strategy. EFB Bioeconomy Journal, 2, 100038. Go to original source...
    62. LAURENZA, E. C., CARREÑO, I. 2015. Edible insects and insect-based products in the EU: safety assessments, legal loopholes and business opportunities. European Journal of Risk Regulation, 6(2), 288-292. Go to original source...
    63. LI, W., LI, M., ZHENG, L., LIU, Y., ZHANG, Y., YU, Z.... LI, Q. 2015. Simultaneous utilization of glucose and xylose for lipid accumulation in black soldier fly. Biotechnology for Biofuels, 8(1), 1-6. Go to original source...
    64. MADAU, F. A., ARRU, B., FURESI, R., PULINA, P. 2020. Insect farming for feed and food production from a circular business model perspective. Sustainability, 12(13), 5418. Go to original source...
    65. MATHEWS, J. A., TAN, H. 2016. Circular economy: lessons from China. Nature, 531(7595), 440-442. Go to original source...
    66. MATTHÄUS, B., PIOFCZYK, T., KATZ, H., PUDEL, F. 2019. Renewable Resources from Insects: Exploitation, Properties, and Refining of Fat Obtained by Cold-Pressing from Hermetia illucens (Black Soldier Fly) Larvae. European Journal of Lipid Science and Technology. 121, 1800376. Go to original source...
    67. MAYUMI, K. 2001. The origins of ecological economics: the bioeconomics of Georgescu-Roegen. London: Routledge. ISBN 9780429232633
    68. MCCORMICK, K., KAUTTO, N. 2013. The bioeconomy in Europe: An overview. Sustainability, 5(6), 2589-2608. METICULOUS RESEARCH®. 2019. Edible Insects Market by Product Type (Whole Insect, Insect Powder, Insect Meal, Insect Type (Crickets, Black Soldier Fly, Mealworms), Application (Animal Feed, Protein Bar and Shakes, Bakery, Confectionery, Beverages) - Global Forecast to 2030. Go to original source...
    69. METICULOUS RESEARCH®. 2021. Black Soldier Fly Market by Product (Protein Meals, Biofertilizers {Frass}, Chitin/ Chitosan, Others {Cocoons, Pupa}), Application (Animal Feed, Agriculture, Pet Food, Pharmaceutical, Cosmetic, Biofuel), and Geography- Global Forecast to 2030.
    70. MICHELINI, G., MORAES, R. N., CUNHA, R. N., COSTA, J. M., OMETTO, A. R. 2017. From linear to circular economy: PSS conducting the transition. Procedia CIRP, 64, 2-6. Go to original source...
    71. MISHYNA, M. CHEN, J., BENJAMIN, O. 2019. Sensory attributes of edible insects and insect-based foods - Future outlooks for enhancing consumer appeal. Trends in Food Science & Technology. DOI: 10.1016/j.tifs.2019.11.016 Go to original source...
    72. MONTANARI, F., DE MOURA, A. P., CUNHA, L. M. 2021. The EU Regulatory Framework for Insects as Food and Feed and Its Current Constraints. In Production and Commercialization of Insects as Food and Feed. Springer, Cham, pp. 41-78. Go to original source...
    73. MYERS, R.H., MONTGOMERY, D.C., VINING, G.G., ROBINSON, T.J. 2010. Generalized linear models: with applications in engineering and the sciences. John Wiley & Sons, Hoboken, New Jersey Go to original source...
    74. NOBRE, G. C., TAVARES, E. 2021. The quest for a circular economy final definition: A scientific perspective. Journal of Cleaner Production, 314, 127973. Go to original source...
    75. NORWEGIAN MINISTRIES. 2016. Familiar resources - undreamt of possibilities. The Government's Bioeconomy Strategy. The Ministry of Trade, Industry and Fisheries, W-0018E.
    76. OECD. 2009. The bioeconomy to 2030: designing a policy agenda. Organisation for Economic Cooperation and Development. OECD publishing, ISBN 978-92-64-03853-0. Go to original source...
    77. OJHA, S., BUßLER, S., SCHLÜTER, O. K. 2020. Food waste valorisation and circular economy concepts in insect production and processing. Waste Management, 118, 600-609. Go to original source...
    78. ONHO, T. 2021. Japan's Bioeconomy Strategy's Featuring Points. Panel 1: Bioeconomy strategies in the different OECD countries: comparison of their objectives, priorities, governance and implementation guidelines. G20
    79. OECD-BNCT WORKSHOP. Bioeconomy in the OECD countries. Presidency of council of Ministers. 16 of July 2021.
    80. OONINCX, D. G., DE BOER, I. J. 2012. Environmental impact of the production of mealworms as a protein source for humans-a life cycle assessment. PloS one, 7(12), e51145. Go to original source...
    81. PATERMANN, C., AGUILAR, A. 2018. The origins of the bioeconomy in the European Union. New biotechnology, 40, 20-24. Go to original source...
    82. PAYNE, C. L., DOBERMANN, D., FORKES, A., HOUSE, J., JOSEPHS, J., MCBRIDE, A., MÜLLER, A., QUILLIAM, R.S., SOARES, S. 2016. Insects as food and feed: European perspectives on recent research and future priorities. Journal of insects as Food and Feed, 2(4), 269-276. Go to original source...
    83. PEARCE, D. W., TURNER, R. K. 1989. Economics of natural resources and the environment. Johns Hopkins University Press.
    84. QUILLIAM, R. S., NUKU-ADEKU, C., MAQUART, P., LITTLE, D., NEWTON, R., MURRAY, F. 2020. Integrating insect frass biofertilisers into sustainable peri-urban agro-food systems. Journal of Insects as Food and Feed, 6(3), 315-322. Go to original source...
    85. RAGOSSNIG, H. A., RAGOSSNIG, A. M. 2021. Biowaste treatment through industrial insect farms: One bioeconomy puzzle piece towards a sustainable net-zero carbon economy?. Waste Management & Research, 39(8), 1005-1006. Go to original source...
    86. RLI. 2015. Circular economy, from wish to practice. Rli Council for the Environment and Infrastructure. ISBN 978-90-77323-25-0
    87. SELLERS, K. F., SHMUELI, G. 2010. A flexible regression model for count data. The Annals of Applied Statistics, 4(2), 943-961. Go to original source...
    88. SIKDAR, S. 2019. Circular economy: Is there anything new in this concept?. Clean Technologies and Environmental Policy, 21(6), 1173-1175. Go to original source...
    89. SINGH, A., KUMARI, K. 2019. An inclusive approach for organic waste treatment and valorisation using Black Soldier Fly larvae: A review. Journal of Environmental Management. 251, 109569. Go to original source...
    90. SKOTNICKA, M., KARWOWSKA, K., KŁOBUKOWSKI, F., BORKOWSKA, A., PIESZKO, M. 2021. Possibilities of the Develop-ment of Edible Insect-Based Foods in Europe. Foods. 10, 766. Go to original source...
    91. SKYQUEST. 2022. Global Black Soldier Fly Market Size, Share, Growth Analysis, By Product (Protein Meals, Biofertilizers), By Application (Animal Feed, Agriculture) - Industry Forecast 2022-2028. Report ID SQSG30H2003. https://skyquestt.com/report/black-soldier-fly-market
    92. STAFFAS, L., GUSTAVSSON, M., MCCORMICK, K. 2013. Strategies and policies for the bioeconomy and bio-based economy: An analysis of official national approaches. Sustainability, 5(6), 2751-2769. Go to original source...
    93. SVERKO GRDIC, Z., KRSTINIC NIZIC, M., RUDAN, E. 2020. Circular economy concept in the context of economic development in EU countries. Sustainability, 12(7), 3060. Go to original source...
    94. TEITELBAUM, L., BOLDT, C., PATERMANN, C. 2020. Global Bioeconomy Policy Report (IV): A decade of bioeconomy policy development around the world. Secretariat of the Global Bioeconomy Summit.
    95. TOMBERLIN, J. K., VAN HUIS, A. 2020. Black soldier fly from pest to 'crown jewel'of the insects as feed industry: an historical perspective. Journal of Insects as Food and Feed, 6(1), 1-4. Go to original source...
    96. THE WHITE HOUSE. 2012. National bioeconomy blueprint, April 2012. The White House Office of Science and Technology Policy, the Obama Administration.
    97. UPDATED BIOECONOMY STRATEGY. 2018. A sustainable bioeconomy for Europe: strengthening the connection between economy, society and the environment. European Commission, Directorate-General for Research and Innovation, Unit F - Bioeconomy. ISBN: 978-92-79-94144-3, doi:10.2777/792130
    98. UN ECLAC. 2019. The Outlook for Agriculture and Rural Development in the Americas: A Perspective on Latin America and the Caribbean 2019-2020 / ECLAC, FAO, IICA. - San Jose, Costa Rica. ISBN: 978-92-9248-866-6
    99. VAN HUIS, A., OONINCX, D. G. 2017. The environmental sustainability of insects as food and feed. A review. Agronomy for Sustainable Development, 37(5), 1-14. Go to original source...
    100. VEA, E. B., ROMEO, D., THOMSEN, M. 2018. Biowaste valorisation in a future circular bioeconomy. Procedia CIRP, 69, 591-596. Go to original source...
    101. VERHEYEN, G.R., OOMS, T., VOGELS, L., VREYSEN, S., BOVY, A., VAN MIERT, S., MEERSMAN, F. 2018. Insects as an Alternative Source for the Production of Fats for Cosmetics. Journal of Cosmetic Science. 69(3), 187-202.
    102. VON BRAUN, J.2014. Bioeconomy and sustainable development - dimensions. Rural, 21(2):6-9
    103. WANG, Y., SHELOMI, M. 2017. Review of Black Soldier Fly (Hermetia illucens) as Animal Feed and Human Food. Foods. 2017, 6(10), E91. Go to original source...
    104. WDF. 2008. Directive 2008/98/EC of the European Parliament and of the Council of 19 November 2008 on waste and repealing certain Directives.
    105. WRAP. 2008. The food we waste. Food waste report v2. Exodus Market Research. ISBN: 1-84405-383-0

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