Hide unhairing: achieving lower pollution loads, decreased wastewater toxicity and solid waste reduction
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10.1016/j.jclepro.2015.11.028
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/85484
Tipus de documentArticle
Data publicació2016-01-20
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This study aims to diminish the pollution being discharged into wastewaters through changes in the
unhairing process. To this aim, we are replacing a reductive hair degrading process with a process which
combines a reductive hair degrading process with an oxidative hair degrading process. Hydrogen
peroxide is used to decrease the supply of sulfide as unhairing chemical. As a result, commercially
acceptable leather regarding both costs and quality is obtained and significant reductions in the
contaminant load of the wastewater being discharged are observed. Results indicate that wastewater
conductivity is cut by 26%, suspended solids decrease by 75%, observable sulfide disappears, while the
amount of chromium being absorbed by the hides is increased. This leads to considerable savings in the
chromium salt offer in hide tanning and, consequently, a decrease in the amount chromium in the
wastewater.
CitacióMorera, J.M., Bartolí, E., Gavilanes, R. Hide unhairing: achieving lower pollution loads, decreased wastewater toxicity and solid waste reduction. "Journal of cleaner production", 20 Gener 2016, vol. 112, núm. 4, p. 3040-3047.
ISSN0959-6526
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JCLEPRO-D-15-01544accepted.pdf | Postprint | 789,0Kb | Visualitza/Obre |