Replacement of lime with carbohydrases – a successful cleaner process for leather making

Durga, Jayanthi; Ranjithkumar, Ammasi; Ramesh, R.; Girivasan, Kozhikottu Thodu Puthan Veedu; Rose, C.; Muralidharan, C.

doi:10.1016/j.jclepro.2015.07.018

Cited by 22 publications

(7 citation statements)

References 10 publications

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“…A noticeable improvement in the environmental area was observed, with reductions up to 80% on the usual parameters: chemical oxygen demand (COD); biochemical oxygen demand (BOD); and total dissolved solids (Jayanthi et al 2019). In the case of Durga et al (2016), the COD reduction achieved 90%, while TDS only 60%. Nevertheless, the considerable difference between both processes lies in time operation and enzyme concentration.…”

Section: Dehairing Methodsmentioning

confidence: 92%

“…An attempt to use carbohydrases to accelerate the processing time, and improve the fiber opening with the elimination of lime, has been explored (Durga et al 2016;Jayanthi et al 2019). A noticeable improvement in the environmental area was observed, with reductions up to 80% on the usual parameters: chemical oxygen demand (COD); biochemical oxygen demand (BOD); and total dissolved solids (Jayanthi et al 2019).…”

Section: Dehairing Methodsmentioning

confidence: 99%

“…Nevertheless, the considerable difference between both processes lies in time operation and enzyme concentration. For Durga et al (2016), 30 min duration with 0.5 wt% of carbohydrase was sufficient, while for Jayanthi et al ( 2019), the process was considered complete after 24 hours with 1 wt% of carbohydrase.…”

Section: Dehairing Methodsmentioning

confidence: 99%

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Overview of the Leather Industry and Pollution Impact

Silva

2021

UPjeng

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The growing awareness of the human and environmental vulnerability, to the pollution resulting from industrial activity, highlights the urgent need for control and mitigate the degradation of the world as we know it. The leather industry, considered as one of the industries with a significant environmental impact, applies several chemicals, some of them considered as hazardous chemicals, such as chromium, in leather production. The restricted EU environmental regulations have driven the search for a process that ensures regulatory compliance and a final product that fulfills society’s requirements. The present review describes alternative options, applied in the leather tanning process in the last five years, to overcome some of the industry barriers, without compromising the final characteristics of leather.

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Section: Dehairing Methodsmentioning

confidence: 92%

Section: Dehairing Methodsmentioning

confidence: 99%

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Overview of the Leather Industry and Pollution Impact

Silva

2021

UPjeng

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“…industries is vermicompost using Eisenia foetida and the results identified the vermicomposting as nutrient-enriched product [47]. In order to reduce the effluent load such as COD, BOD and TDS from leather industries, a new enzymatic process for fiber opening using Aspergillus Terreus is developed as a substitute for conventional liming process [48]. The quality of leather obtained by using the proposed enzymatic technique was found to be better than that of conventional liming leather.…”

Section: Moving Towards Green Technologymentioning

confidence: 99%

Leather waste management scenario in Developed and Developing nations: A Comparative

Koppiahraj¹,

Sankaranarayanan²,

Saravanasankar³

2019

IJEAT

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Solid waste management has been a serious issue of concern for both developing and developed nations as it stands out to be a potential threat in term of health hazards, environmental exploitation and economic burden. Hence, a properly well-designed eco-friendly solid waste management system is mandatory. Most of the developed countries had witnessed success in handling solid waste generated by households and industries by implementing closed-loop supply chain management (CLSCM) and majorly by outsourcing. But, solid waste management scenario in developing nations is entirely different and is not even in initial stage. This paper specially emphasize on leather industries solid waste management as leather industries around the world possess threat to mankind and environment. In this study, papers on leather solid waste management is selected and reviewed. Finally, a strategic comparison is made between the waste management techniques followed in developing and developed nation.

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“…Currently, manufactured leather goods are highly socially prestigious worldwide. Leather processing involves a set of sequential steps from raw hide to the finished leather, and enzymes are used extensively in many of these process steps as environmentally benign alternatives, either replacing the chemicals completely or at least partly substituting for them [1]. The raw material is processed to achieve a series of desired industrial qualities, namely structural stability, resistance, adequate elasticity, lack of spots, and depilation, among others [2].…”

Section: Introductionmentioning

confidence: 99%

Latex peptidases of Calotropis procera for dehairing of leather as an alternative to environmentally toxic sodium sulfide treatment

López

Viana

Errasti

et al. 2017

Bioprocess Biosyst Eng

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Dehairing of crude leather is a critical stage performed at the beginning of its processing to obtain industrially useful pieces. Tanneries traditionally apply a chemical process based on sodium sulfide. Since this chemical reactive is environmentally toxic and inefficiently recycled, innovative protocols for reducing or eliminating its use in leather depilation are welcomed. Therefore, latex peptidases from Calotropis procera (CpLP) and Cryptostegia grandiflora (CgLP) were assayed for this purpose. Enzyme activity on substrates representative of skin such as hide powder azure (U), elastin (U), azocollagen (U), keratin (U), and epidermis (U) was determined, while depilation activity was assayed on cow hide. Only CpLP was active against keratin (13.4 U) and only CgLP was active against elastin (0.12 U). CpLP (93.0 U, 403.6 U, 36.3 U) showed higher activity against the other substrates than CgLP (47.6 U, 261.5 U, 8.5 U). In pilot assays, CpLP (0.05% w/v with sodium sulfite 0.6% w/v as activator) released hairs from cow hide pieces. Macroscopic and microscopic analyses of the hide revealed that the dehairing process was complete and the leather structure was preserved. The proteolytic system of C. procera is a suitable bioresources to be exploited by tanneries.

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Replacement of lime with carbohydrases – a successful cleaner process for leather making

Cited by 22 publications

References 10 publications

Overview of the Leather Industry and Pollution Impact

Overview of the Leather Industry and Pollution Impact

Leather waste management scenario in Developed and Developing nations: A Comparative

Latex peptidases of Calotropis procera for dehairing of leather as an alternative to environmentally toxic sodium sulfide treatment

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