Valorisation of Tannery Waste to Recover Chromium with a View to Reusing It in Industrial Practise

This paper presents the basic assumptions of the concept of a new technology for the valorisation of chromium tannery waste. It assumes the use of an integrated system of the thermal pressure hydrolysis process and membrane filtration techniques for the recovery of chromium compounds and the use of...

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Bibliographic Details
Published in:Membranes (Basel) 2024-06, Vol.14 (6), p.136
Main Authors: Kowalik-Klimczak, Anna, Łożyńska, Monika, Życki, Maciej, Schadewell, Christian, Fiehn, Thomas, Woźniak, Bogusław, Flisek, Monika
Format: Article
Language:English
Subjects:
Backup software
Carcinogens
Caustic soda
Centrifugal force
Chemical oxygen demand
Chromium
Chromium compounds
chromium waste
Circular economy
Fermentation
Hydrolysates
Hydrolysis
Innovations
Membrane filtration
Membranes
Methods
Organic matter
Proteins
R&D
Recovery
Research & development
Tannery wastes
Tanning
tanning industry
Technology application
thermal pressure hydrolysis (TPH)
Ultrafiltration
ultrafiltration (UF)
Waste management
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Summary:This paper presents the basic assumptions of the concept of a new technology for the valorisation of chromium tannery waste. It assumes the use of an integrated system of the thermal pressure hydrolysis process and membrane filtration techniques for the recovery of chromium compounds and the use of a separated organic matter during anaerobic fermentation. According to the assumptions of the developed technological concept, at the first stage, the crushed mixture of chromium tannery waste is decomposed in the process of thermal pressure hydrolysis using appropriate process conditions in an alkaline environment. Then, the liquid product of this process (the so-called hydrolysate) is processed using centrifugal force separation and ultrafiltration. Such activities enable the recovery of chromium compounds for rawhide currying and concentration of organic matter (fats, proteins) with energy potential. Research carried out under conditions similar to real operating conditions proved that chromium compounds recovered from waste can be successfully used in the processing of cowhides intended for the production of footwear. The industrial implementation of the developed technology for valorising chromium tannery waste would enable the transition from a linear to a circular economy.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes14060136