An integrated pickling-bating technology for reducing ammonia-nitrogen and chloride pollution in leather manufacturing

Zhang, Xu; Chattha, Sadaqat Ali; Song, Jin‐Zhi; Zhang, Chunxiao; Peng, Biyu

doi:10.1016/j.jclepro.2022.134070

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…Using enzymes for pickling–bating, a higher uptake of chrome and post-tanning chemicals was reached. Fibre relaxation enables other tanning and re-tanning substances to better penetrate the hide [ 15 ]. This effect was obtained not only after bating, but also after re-bating [ 17 ].…”

Section: Resultsmentioning

confidence: 99%

“…Širvaitytė et al, used acidic enzymes in pelt bating after de-liming with peracetic acid; the process results indicating the suitability of acidic protease in bating [ 10 ]. Other researchers have reported promising results in pickling–bating processes [ 7 , 14 , 15 ], where enzymes were used in a pickling solution after bating, or two processes were combined together.…”

Section: Introductionmentioning

confidence: 99%

“…The study by Zhang et al [ 15 ] suggests that bating performance depends on the amount of Cr in the leather. After chroming, the leather becomes more resistant to protease.…”

Section: Introductionmentioning

confidence: 99%

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Wet Blue Enzymatic Treatment and Its Effect on Leather Properties and Post-Tanning Processes

Biškauskaitė

Valeika

2023

Materials

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Due to their variety, specific activity, and mild reaction conditions, enzymes have a wide application in beam house processes such as soaking, dehairing, bating, and de-greasing. Recently, due to improvements in biotechnology, re-bating after chroming has received increased attention. The aim of this work was to investigate the application of enzyme preparation in the re-bating process and its effect on the semifinished and finished product, as well as its influence on post-tanning operations. The enzymatic treatment of chromed semifinished leather (wet blue) led to a higher shrinkage temperature (1–6 °C), greater water vapour absorption (0.3–5.5%), better chromium compounds exhaustion during re-chroming (4–21%), and better dye penetration. Moreover, collagen was affected during the enzymatic process; the results showed a greater concentration influence in the operation compared to the process time. On the other hand, no effect on the physical and mechanical properties and fat-liquoring process was observed. Overall, these results indicate that some properties and processes are improved; however, before use for re-bating, every enzyme should be carefully investigated.

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Section: Resultsmentioning

confidence: 99%