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Recycling Food, Energy Industry and Household Waste into Biofertilizers for Sustainable Agriculture

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Agriculture".

Deadline for manuscript submissions: 28 February 2026 | Viewed by 200

Special Issue Editors


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Guest Editor
Department of Physical and Inorganic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology, LT-50254 Kaunas, Lithuania
Interests: solid and liquid fertilizers; biomaterials; waste; technology and engineering; recycle; granulation; soil healthy; environmentally; plant nutrient leaching

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Guest Editor
Department of Physical and Inorganic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology, LT-50254 Kaunas, Lithuania
Interests: natural sciences; chemical engineering; agroculture

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Guest Editor
Department of Physical and Inorganic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology, LT-50254 Kaunas, Lithuania
Interests: complex fertilizers; analysis and production technologies of inorganic materials; standardization; agrochemistry; plant nutrients material; biostimulants

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the development, research, and application of innovative technologies in the production of special compound fertilizers with various additives that enhance their efficiency and align with the principles of the Green Deal. Particular emphasis is placed on circular economy principles, converting by-products or waste materials from other industries, such as the food and energy sectors, into new or modified fertilizer products. Articles should explore innovative methods for optimizing nutrient availability while minimizing the environmental impact on soil, water, and air. Studies addressing technologies for the restoration of organic matter in the soil or those offering solutions to reduce nitrogen emissions are particularly welcome. In general, all research that promotes sustainable, innovative and environmentally friendly practices in the production and use of fertilizers in agriculture is encouraged.

This Issue will examine multiple topics (fertilizer additives, waste recycling, sustainable production, climate change mitigation, etc.) that aim to bring together and emphasize the practical agronomic application of scientific research results, based on specific technological solutions, technological engineering innovations and innovative agronomical techniques that help increase agroecosystems sustainability and/or reduce non-removable resources use. Studies that are involved with specific companies in the food, energy, and fertilizer production industries and/or farms are especially welcome.

Dr. Rasa Šlinkšienė
Dr. Kristina Jančaitienė
Dr. Rasa Paleckiene
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • sustainable agroecosystems
  • biofertilizers
  • organic fertilizers
  • liquid biofertilizers
  • bulk biofertilizers
  • fertilizer industry, fertilizer engineering technology
  • bioorganic materials
  • sustainable fertilizer-plant systems
  • industrial waste recycling
  • environmental sustainability
  • soil health
  • carbon-nitrogen ratio
  • plant nutrients, nitrogen leaching
  • potassium leaching, greenhouse gas emissions, biochar, pyrolysis

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Published Papers (1 paper)

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Research

20 pages, 3741 KiB  
Article
Use of Amino Acids and Organic Waste Extracts to Improve the Quality of Liquid Nitrogen–Calcium–Magnesium Fertilizers
by Eglė Didžiulytė and Rasa Šlinkšienė
Sustainability 2025, 17(15), 7081; https://doi.org/10.3390/su17157081 - 5 Aug 2025
Abstract
Agriculture is one of the most important sectors of the global economy, but it increasingly faces sustainability challenges in meeting rising food demands. The intensive use of mineral fertilizers not only improves yields, but also causes negative environmental impacts such as increasing greenhouse [...] Read more.
Agriculture is one of the most important sectors of the global economy, but it increasingly faces sustainability challenges in meeting rising food demands. The intensive use of mineral fertilizers not only improves yields, but also causes negative environmental impacts such as increasing greenhouse gas emissions, water eutrophication, and soil degradation. To develop more sustainable solutions, the focus is on organic fertilizers, which are produced using waste and biostimulants such as amino acids. The aim of this study was to develop and characterize liquid nitrogen–calcium–magnesium fertilizers produced by decomposing dolomite with nitric acid followed by further processing and to enrich them with a powdered amino acid concentrate Naturamin-WSP and liquid extracts from digestate, a by-product of biogas production. Nutrient-rich extracts were obtained using water and potassium hydroxide solutions, with the latter proving more effective by yielding a higher organic carbon content (4495 ± 0.52 mg/L) and humic substances, which can improve soil structure. The produced fertilizers demonstrated favourable physical properties, including appropriate viscosity and density, as well as low crystallization temperatures (eutectic points from –3 to –34 °C), which are essential for storage and application in cold climates. These properties were achieved by adjusting the content of nitrogenous compounds and bioactive extracts. The results of the study show that liquid fertilizers enriched with organic matter can be an effective and more environmentally friendly alternative to mineral fertilizers, contributing to the development of the circular economy and sustainable agriculture. Full article
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