Goatskin preservation with plant oil: significant chloride reduction in tannery wastewater

Nur‐A‐Tomal, Md. Shahruk; Hashem, Md. Abul; Zahin, Enamul Hasan; Pulok, Lutful Hossain; Das, M; Mim, Sadia

doi:10.1007/s11356-020-11311-z

Cited by 13 publications

(2 citation statements)

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“…Organic plant extract like Moringa oleifera [17] has been applied as an alternative organic preservative. Utilization of Citrus limon leaf extract [18] and extracted oil from Aphanamixis polystachya seed [19] for preservation are recent well developed approach but the preparation of the leaf and oil extract requires extra attention. Rumex abyssinicus with salt have also been tried for preservation but it affects the strength and other properties of the final leather [20].…”

Section: Introductionmentioning

confidence: 99%

Green Preservation of Goatskin to Deplete Chloride from Tannery Wastewater

Hashem

Payel

Hasan

et al. 2021

HighTech. Innov. J.

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Globally, in wet-salting preservation, common salt (sodium chloride, NaCl) is generally practiced for the raw animal skin which emits a huge amount of chloride-containing wastewater affecting groundwater quality, human and plant life. Chlorides in tannery wastewater encourage salt-free or less-salt preservation methods of raw skin. In this study, an alternative salt-free ‘green method’ has been described for goatskin preservation with rapidly growing obnoxious weeds Sphagneticola trilobata leaf. The ‘green leaf paste’ was applied on the flesh side of the raw goatskin and compared with conventional wet-salting (50% NaCl) method for 28 days. Different parameters of both sample like moisture, nitrogen, hydrothermal stability, and bacterial growth were periodically assessed and compared. Shoe upper leather was produced from both preserved goatskins. After comparing with standards, the physical properties like tensile strength, elongation at break, bursting strength satisfied the standard requirements. SEM images showed no deterioration to the fiber structure of both samples. Moreover, the suggested method reduces the pollution loads: chloride, total dissolved solids, biochemical oxygen demand, and chemical oxygen demand by 98.04%, 92.9%, 90.2%, and 85.5%, respectively. The overall assessment recommends that the salt-free ‘green method’ utilizing S. trilobata leaf paste could be an attractive system over the conventional wet-salting method. Doi: 10.28991/HIJ-2021-02-02-03 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Green Preservation of Goatskin to Deplete Chloride from Tannery Wastewater

Hashem

Payel

Hasan

et al. 2021

HighTech. Innov. J.

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“…Hashem et al 29 observed that goatskin preservation with Moringa oleifera leaf pest is more environment friendly compared to the conventional salt preservation process. Nur-A-Tomal et al 30 claimed that Aphanamixis polystachya seeds oil could preserve the goatskin, which could reduce the chloride content from the soaking wastewater. Hence, a study was attempted to preserve goatskin with Ficus hispida leaf paste in combination with lower salt or salt-free.…”

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confidence: 99%

Ficus hispida leaf paste for goatskin preservation: Pollution reduction in tannery wastewater

Hashem

Hasan

Islam

et al. 2021

Env Prog and Sustain Energy

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Wet salting preservation is commonly practiced to preserve raw hide/skin which discharges high salinity wastewater during soaking operation of hide/skin processing.The saline wastewater significantly pollutes the environment. In this study, a novel plant-based approach has been made to preserve the goatskin to reduce pollution in tannery wastewater. The Ficus hispida plant leaf paste with a minimal amount of common salt was applied on the flesh side of raw goatskin. Efficacy of the method was evaluated by scrutinizing thermal stability, hair slip, odor, moistness percentage, Total Kjeldahl Nitrogen, and bacterial count in comparison with the conventional wet salting preservation method for 28 days. Pollution load in the wastewater, for example, total dissolved solids (TDS), total suspended solids (TSS), chloride (Cl À ), biochemical oxygen demand (BOD), and chemical oxygen demand (COD) was measured following the APHA method. Results indicate that the novel plant-based method has decreased the pollution load of Cl À , TDS, TSS, BOD, and COD in the tannery wastewater by 51.02%, 41.6%, 37.1%, 2.9%, and 14.6%, respectively. Leather produced from the experimentally preserved goatskin illustrates similar physical properties in comparison to the leather produced from conventionally preserved goatskin. The proposed preservation technique of goatskin in combination with lower salt might be an ecological alternative that could decrease the pollution load especially in soaking operation.

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