Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item Synergetic effect of digestate dissolved organic matter and phosphogypsum properties on heavy metals immobilization in soils(Sumy State University, 2024) Скворцова, Поліна Олексіївна; Skvortsova, Polina Oleksiivna; Аблєєва, Ірина Юріївна; Ablieieva, Iryna Yuriivna; Tonderski, K.; Черниш, Єлізавета Юріївна; Chernysh, Yelyzaveta Yuriivna; Пляцук, Леонід Дмитрович; Pliatsuk, Leonid Dmytrovych; Сіпко, Ірина Олександрівна; Sipko, Iryna Oleksandrivna; Mykhno, H.I.The main idea was to justify the natural, technological, and ecological aspects of digestate-based composite for heavy metals (HMs) binding in soil due to organic matter content and mineral additives’ biosorption properties. The study aimed to determine the potential of a composite made from digestate and phosphogypsum for remediation of HMs polluted soils and the role of dissolved organic matter (DOM) in binding HMs. Methods used included a literature review to identify the mechanisms for HM binding to digestate DOM, a laboratory setup for producing a digestate-based composite with digestate (from manure or sewage sludge) mixed with phosphogypsum, and an analysis of digestate fluorescence properties. Results show that a composite based on digestate from manure as feedstock had a higher fluorescence complexity index than a composite with sewage sludge digestate (2.2 and 1.71, respectively). However, the DOM stability in the sewage sludge digestate composite was higher than reported in the literature, probably due to the mineral composition of phosphogypsum, which resulted in a high HMs sorption capacity and its positive effect on soil microbial activity. Based on the theoretical substantiation of DOM content and its binding properties, manure was the most effective feedstock type out of the two tested if digestate was used for HM remediation. Using a digestate-based composite with phosphogypsum can potentially reduce the ecological risk levels imposed by HM-contaminated soils from considerably too low.Item Effect of phosphogypsum addition on methane yield in biogas and digestate properties during anaerobic digestion(Sumy State University, 2022) Чубур, Вікторія Сергіївна; Чубур, Виктория Сергеевна; Chubur, Viktoriia Serhiivna; Черниш, Єлізавета Юріївна; Черныш, Елизавета Юрьевна; Chernysh, Yelyzaveta Yuriivna; Ferchau, E.; Zaffar, N.The study discussed the use of phosphogypsum by-product waste in anaerobic digestion processes. Besides the production of biogas from plant substrate with the addition of phosphogypsum, the focus was placed on the enrichment of digestate with phosphogypsum as a mineral additive to increase the concentration of valuable macro-and microelements. The component composition of the obtained digestates was analyzed, and opportunities for additional research were determined. Research on the use of mineral additives in anaerobic digestion is considered promising. Phosphogypsum favors the quality of digestate as an organic mineral fertilizer with a higher content of mineral components. Furthermore, the contribution of phosphogypsum to plant substrate to achieve higher biogas production is not apparent, but with an impact on the component composition of biogas; however, there is an opportunity to consider the potential benefits of using the additive with another type of substrate waste for the anaerobic digestion process.Item Digestate potential to substitute mineral fertilizers: Engineering approaches(Sumy State University, 2022) Аблєєва, Ірина Юріївна; Аблеева, Ирина Юрьевна; Ablieieva, Iryna Yuriivna; Geletukha, G.G.; Kucheruk, P.P.; Enrich-Prast, A.; Carraro, G.; Бережна, Ірина Олексіївна; Бережная, Ирина Алексеевна; Berezhna, Iryna Oleksiivna; Бережний, Дмитрій Михайлович; Бережной, Дмитрий Михайлович; Berezhnyi, Dmytrii MykhailovychThe study aims to define the potential and technological aspects of the digestate treatment for its application as a biofertilizer. Life cycle assessment methodology was used in terms of digestate quality management. The potential of nutrients, organic carbon, and useful microelements in the digestate allows for its consideration as a mineral fertilizer substitute and soil improver. The valorization of digestate as fertilizer requires quality management and quality control. Based on the research focus, the successful soil application of digestate post-treatment technologies was analyzed. Among the different commercial options for digestate treatment and nutrient recovery, the most relevant are drying, struvite precipitation, stripping, evaporation, and membranes technology. Comparing the physical and chemical properties of the whole digestate, separated liquid, and solid liquor fractions showed that in the case of soil application of granular fertilizer, nutrients from the digestate are released more slowly than digestate application without granulation. However, realizing this potential in an economically feasible way requires improving the quality of digestate products through appropriate technologies and quality control of digestate products. To support the manufacture of quality digestate across Europe, the European Compost Network developed a concept for a panEuropean quality assurance scheme.