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Title: RELEASE OF ORGANIC COMPOUNDS FROM DIFFERENT TYPES OF FERTILIZERS OBTAINED FROM SKIN WASTE
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RELEASE OF ORGANIC COMPOUNDS FROM DIFFERENT TYPES OF FERTILIZERS OBTAINED FROM SKIN WASTE
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1314-2704
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English
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19
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4.2
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The European Union ?circular economy? aims to maintain the value of products, materials and resources for as long as possible, minimizing the generation of waste by recycling and reusing them [1]. The leather industry generates large amounts of waste, more than 55% of raw material (hides and skin), and over 99% are stored at the landfill [2, 3]. Part of these waste generated are untreated solid waste (hide and skin), meaning around 500-600 kg per ton of raw hides [4, 5].
A way to valorize the untreated hide and skin waste is production of three-dimensional molecular networks named, hydrogels, by cross-linking the proteins hydrolysated (obtained from skin and hide) with copolymers based on polyacrylamide, polyvinyl alcohol, oligo oxyethylene methacrylate, acrylic acid, maleic acid, cellulose, starch, gum. The hydrogels enriched in nutrients C, N, P, K encapsulated can be used as fertilizers in agriculture for degraded soils [6, 7]. In this work the releasing degree of organic compounds for three types of hydrogels designated as AMIGEL, POLYGEL and SMARTGEL obtained from pelt skin waste has been investigated. The releasing rate of organic compounds from composite fertilizers in water is essential for describing the carbon release in soil. It is demonstrated that collagen hydrogel functionalized with biopolymers, for instance starch, exhibits superior fertilization capacity as compared to synthetic polymers. |
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conference
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19th International Multidisciplinary Scientific GeoConference SGEM 2019
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19th International Multidisciplinary Scientific GeoConference SGEM 2019, 9 - 11 December, 2019
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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127-134
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9 - 11 December, 2019
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website
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cdrom
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6651
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skin waste; composite fertilizer; collagen hydrogel; organic compounds release
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