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RELEASE OF ORGANIC COMPOUNDS FROM DIFFERENT TYPES OF FERTILIZERS OBTAINED FROM SKIN WASTE

Ana‐Maria Manea‐Saghin

First published: 2019-12-05https://doi.org/10.5593/sgem2019v/4.2/s05.018View metrics

Abstract

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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Publication details

Title
RELEASE OF ORGANIC COMPOUNDS FROM DIFFERENT TYPES OF FERTILIZERS OBTAINED FROM SKIN WASTE
Authors
Ana‐Maria Manea‐Saghin
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings19th, Energy and Clean Technologies
Publisher
STEF92 Technology
Year
2019
Pages
127-134
SWS Citekey
Manea-Saghin20195127134
ISSN
1314-2704
ISBN
978-619-7408-98-0
Language
en
Publication type
Conference Paper
Keywords
skin wastecomposite fertilizercollagen hydrogelorganic compounds release
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