Obtaining Granules from Waste Tannery Shavings and Mineral Additives by Wet Pulp Granulation.

Katarzyna Ławińska,Tomasz Wężyk,Andrzej Obraniak,Andrzej Rostocki,Remigiusz Modrzewski,Szymon Szufa,Tomasz P. Olejnik

doi:10.3390/molecules25225419

Katarzyna Ławińska, Tomasz Wężyk + Show 5 more

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https://doi.org/10.3390/molecules25225419

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Abstract

This paper presents the results of research on the granulation process of leather industry waste, i.e., tanning shavings. It is economically justified to granulate this waste together with mineral additives that are useful in the processes of their further processing. Unfortunately, the granulation of raw, unsorted shavings does not obtain desired results due to their unusual properties. In this study, the possibilities of agglomeration of this waste were examined by a new method consisting of the production and then the granulation of wet pulp. During granulation, no additional binding liquid is added to the granulated bed. As part of this work, the specific surface of granulated shavings, the granulometric composition of the obtained agglomerates, and their strength parameters were determined. The use of a vibrating disc granulator, the addition of a water glass solution (in the pulp), dolomite, and gypsum made it possible to obtain durable, mechanically stable granules.

Highlights

The industrial sector, including tanneries, distilleries, and paper and textile industries, plays an essential role in the manufacturing of various products to fulfill the needs of society
Tannery shavings shavings consist of aa material material that that is is difficult difficult to to screen, screen, but but after after ensuring ensuring appropriate appropriate conditions for the process, process, sieve sieve classification is possible
It should be emphasized thatsieving after sieving the for screening raw tanning shavings is 20 min

Summary

Introduction

The industrial sector, including tanneries, distilleries, and paper and textile industries, plays an essential role in the manufacturing of various products to fulfill the needs of society. These industries continue to emit waste contaminants to the environment during the manufacturing process [1]. The tannery industry is one of the most polluting industries considering the generation of a massive amount of liquid and solid waste [2,3]. The literature indicates that normally only 255 kg of finished leather is produced by processing 1 ton of raw hides, where approximately 75% of the raw material is discarded in the form of collagen and flashing wastes [4]. The most concerning organic waste includes that rich in lipids, cellulose, and protein, with a high organic load and poorly biodegradable compounds added due to tanning technologies [6,7]

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