A cleaning and efficient approach to improve wet-blue sheepleather quality by enzymatic degreasing

Abstract Enzyme is a green, efficient and easily degradable substance. In the present investigation, the papain and 100-c enzyme instead of part of surfactants were used in degreasing process. The results indicated that when wet-blue sheepleather was treated by the enzymatic compound, protein content in the effluent was about 9 times more than that of the non-ionic degreasing agent with less damage to collagen. Moreover, the degreasing rate for enzyme degreasing was 40.1% which was much higher than that of non-ionic degreasing agent. Mechanical properties of the crust leather treated by enzymatic compound were matchable to those treated by non-ionic degreasing agent. Color difference values of the leather indicated that the wet-blue sheepleather was easy to be dyed after being treated by enzymatic compound. The K/S value of the leather treated by enzymatic compound was much higher than that treated by non-ionic degreasing agent. Histological analysis of wet-blues visually showed efficient fat removal by enzymatic compound. Enzymatic compound used in degreasing of greasy wet-blues could improve the leather’ quality.

[1]  Mira Park,et al.  Combined effect of corona discharge and enzymatic treatment on the mechanical and surface properties of wool , 2014 .

[2]  N. K. Chandrababu,et al.  Kinetics of leather dyeing pretreated with enzymes: role of acid protease. , 2009, Bioresource technology.

[3]  N. Gupta,et al.  Approach to ecofriendly leather: characterization and application of an alkaline protease for chemical free dehairing of skins and hides at pilot scale , 2014 .

[4]  Chen Wuyong,et al.  Kinetics of enzymatic unhairing by protease in leather industry , 2011 .

[5]  P. K. Sehgal,et al.  Greener approach to leather tanning process: d-Lysine aldehyde as novel tanning agent for chrome-free tanning , 2013 .

[6]  Rames C. Panda,et al.  Eco-friendly waste management strategies for greener environment towards sustainable development in leather industry: a comprehensive review , 2015 .

[7]  Jianzhong Ma,et al.  Application of an amphoteric polymer for leather pickling to obtain a less total dissolved solids residual process , 2016 .

[8]  R. E. Neuman,et al.  The determination of hydroxyproline. , 1950, The Journal of biological chemistry.

[9]  N. R. Kamini,et al.  Understanding the chemical free enzyme based cleaner unhairing process in leather manufacturing , 2014 .

[10]  S. Ganesh,et al.  Cohesive system for enzymatic unhairing and fibre opening: an architecture towards eco-benign pretanning operation , 2014 .

[11]  X. Hou,et al.  Greener approach to efficient leather soaking process: role of enzymes and their synergistic effect , 2014 .

[12]  Johan Börjesson,et al.  Mechanism of surfactant effect in enzymatic hydrolysis of lignocellulose , 2002 .

[13]  Balaraman Madhan,et al.  Cleaner tanning practices for tannery pollution abatement: Role of enzymes in eco-friendly vegetable tanning , 2009 .

[14]  R. K. Saxena,et al.  Enzyme mediated beam house operations of leather industry: a needed step towards greener technology , 2013 .

[15]  O. H. Lowry,et al.  Protein measurement with the Folin phenol reagent. , 1951, The Journal of biological chemistry.

[16]  Venkatasubramanian Sivakumar,et al.  Towards cleaner degreasing method in industries: ultrasound-assisted aqueous degreasing process in leather making , 2009 .