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DOI: 10.15862/02NZOR323 (https://doi.org/10.15862/02NZOR323)

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Gladun I.V., Mayorova L.P. Assessment of the carbon footprint of an aquaculture enterprise. Russian journal of resources, conservation and recycling. 2023; 10(3). Available at: https://resources.today/PDF/02NZOR323.pdf (in Russian). DOI: 10.15862/02NZOR323

Assessment of the carbon footprint of an aquaculture enterprise

Gladun Igor Vladimirovich
Pacific Nationnal University, Khabarovsk, Russia
E-mail: 006209@pnu.edu.ru

Mayorova Ludmila Petrovna
Pacific Nationnal University, Khabarovsk, Russia
E-mail: 000318@pnu.edu.ru
ORCID: https://orcid.org/0000-0002-6326-982X
RSCI: https://elibrary.ru/author_profile.asp?id=496438
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=56267059300

Abstract. To ensure Russia’s transition to an environmentally balanced development path, it is necessary to reduce anthropogenic pressure on the environment — to break economic growth and greenhouse gas emissions. The most significant sources of greenhouse gas emissions, in addition to industrial production, include the disposal and thermal treatment of waste generated in the fishing and fish processing industries. It is estimated that the amount of fish waste generated can be as high as 50 % of the catch or 50–75 % of the processed fish. Numerous studies are currently underway on the bioconversion of fish waste by black soldier fly larvae (Hermetia illucens), both to reduce greenhouse gas emissions and to produce fish feed for aquaculture enterprises. The article presents the results of a study of a comparative analysis of four different scenarios (utilization, composting, incineration and disposal) for greenhouse and acid gas emissions from the management of fish waste generated as a result of the operation of the Anyui fish hatchery. It is shown that the global warming potential was maximum when waste was composted (0.189 t CO₂-eq. per 1 t of waste) and minimal when it was thermally decontaminated in a cremator (0.015 t CO₂-eq.). During the disposal of fish waste by H. illucens larvae, the contribution of CO₂ to the global warming potential was 99.57 %, emissions of methane (0.005 t CO₂-eq.) and nitrous oxide (0.024 t CO₂-eq.) were insignificant and significantly lower compared to other processing scenarios. Emissions of nitrogen oxides, sulfur dioxide, and carbon monoxide during utilization by H. illucens larvae were absent. During the thermal treatment of fish waste, the maximum acidifying effect was observed — 3.712 kg SO₂-eq./kg of substance; during the disposal of waste at the MSW landfill, the emission of SO₂ and NO_x amounted to 0.4 kg SO₂-eq./kg.

Keywords: aquaculture; carbon footprint; greenhouse gases; fish waste; recycling; industry; emissions

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