Hydrolysis of leather shavings waste for protein binder

Pahlawan, Iwan Fajar; Sutyasmi, Sri; Griyanitasari, Gresy

doi:10.1088/1755-1315/230/1/012083

Cited by 12 publications

(8 citation statements)

References 2 publications

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“…There are also combined methods, such as enzymatic and acid hydrolysis. The hydrolysis of leather shavings resulted in a liquid and solid substance with potential applications [98]. The chemical and biochemical method confirmed that the efficiency of protein extraction was 60% and 80%, respectively [99].…”

Section: Discussionmentioning

confidence: 99%

Production of Agglomerates, Composite Materials, and Seed Coatings from Tannery Waste as New Methods for Its Management

Ławińska

2021

Materials

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This paper presents methods for managing waste produced by the leather industry, including tanning shavings derived from chrome tanning technologies and collagen preparations. Shavings were classified according to their shape (in accordance with Zingg’s shape classification). The content of individual elements was determined, together with the content of volatile organic compounds. Two new products were developed as part of the completed works: agglomerates (methods of non-pressure granulation) and composite materials were produced on the basis of tanning shavings and mineral fillers. Young’s modulus values classify these composite materials in the group of polymers and certain materials from the group of elastomers. A method for seed coating (on the example of legumes and rape) was also developed using a disc granulator, including collagen preparations in one of the layers as a solution for preventing the effects of droughts (biostimulant). The analyses of selected properties of the new products confirm the wide possible application of waste shavings and collagen preparations in a circular economy, especially in the construction, packaging, and agricultural sectors.

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Section: Discussionmentioning

confidence: 99%

Production of Agglomerates, Composite Materials, and Seed Coatings from Tannery Waste as New Methods for Its Management

Ławińska

2021

Materials

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“…Therefore, the leather industry must develop new bio-based systems for finishing, aiming at more ecologicallyfriendly production processes. Developing new bio-based finishing systems with highly compatible base and top coats, as well as highly compatible finishing formulations and leather surfaces, is the most challenging objective in this field [10].…”

Section: Introductionmentioning

confidence: 99%

From Leather Wastes back to Leather Manufacturing: The Development of New Bio-Based Finishing Systems

et al. 2023

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The leather industry is currently between two opposing paths: on the one hand, recent legislative trends in terms of the eco-sustainability of industrial processes are leading leather manufacturing towards the development of cleaner production methods; on the other hand, the spread of new alternative materials to leather is driving the leather industry to improve its competitiveness by developing new innovative and high-quality products. Leather finishing is one of the most important phases of leather production, and is capable of improving its quality and organoleptic properties. However, this phase is characterized by the use of polluting chemical products, such as volatile organic compounds, potentially toxic crosslinking agents, and hardly biodegradable resins. In this context, this research work aims to develop a finishing formulation capable of giving leather the durability and quality properties required by the market, while at the same time, being eco-sustainable. Specifically, the aim of the present work is to suggest a new finishing formulation in terms not only of green technology but also of a circular production flow, by recovering solid leather wastes. The developed finishing system is based on the application of collagen, extracted from tanned wastes through an enzymatic treatment, to be cross-linked and bound to the leather surface. This new bio-based leather finish is compared to a resin-based leather finish, and shows the same quality standards as those requested by the market.

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“…Many scientific groups have oriented their research to find a process to recycle and treat these wastes [14][15][16][17][18][19][20]. Chrome-tanned leather scraps and shavings have previously been converted into fertilizers by thermal or enzymatic transformation, but without much success due to the presence of chromium in such waste [1,[21][22][23][24][25][26]. The procedures that have been developed so far, to decontaminate such tannery wastes for re-use as a fertilizer or animal feed additive or for other industrial applications, are complex, time-consuming and expensive.…”

Section: Introductionmentioning

confidence: 99%

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

Mwondu

Ombui

Kironchi

et al. 2021

TLR

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Huge quantities of chromium-containing leather solid wastes are generated during the production of chrome-tanned leather worldwide. Disposal of these huge quantities of leather solid wastes is a major challenge due to the presence of chromium, which is highly toxic (mainly in its hexavalent form) and detrimental to the environment. Sustainable and environmentally friendly methods of their disposal and treatment options for removing chromium are required so that the dechromed waste can be utilized to make useful products, such as fertilizer for soil conditioning, to improve agriculture, or other applications. In this study, therefore, a new method of dechroming leather solid wastes was designed, whose procedure and results were compared with three other commonly used methods. The focus of the various dechroming methods was on the evaluation of the degree of chromium extraction from chrome-tanned leather wastes without destroying the collagen tissues. The average total amount of extractable chromium content (Cr2O3) in the dried leather waste samples was found to be 3.67%. The new method was found to be relatively more efficient, environmentally sound and less cumbersome than all the other methods investigated in this work. At P-Value of < 0.05, concentrations of chromium extracted and %TKN in residual collagen hydrolysate reached up to 99.89% and 52.89%, respectively. The levels of total ash and total organic carbon were also relatively high in the resultant collagen hydrolysate (i.e. 12.42% and 23.27%, respectively). The t distribution test on the results of the various dechroming methods confirmed that there was a significant difference at 95% confidence interval, since t (calculated) was greater than t (tabulated). It was concluded that nearly all the chromium in chrome-tanned leather wastes can be removed with a simple technology, which is sustainable and environmentally sound.

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Hydrolysis of leather shavings waste for protein binder

Cited by 12 publications

References 2 publications

Production of Agglomerates, Composite Materials, and Seed Coatings from Tannery Waste as New Methods for Its Management

Production of Agglomerates, Composite Materials, and Seed Coatings from Tannery Waste as New Methods for Its Management

From Leather Wastes back to Leather Manufacturing: The Development of New Bio-Based Finishing Systems

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

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