Leather buffing dust in brick production: Solid waste management in tanneries

Milu, Md. Shohag; Hashem, Md. Abul; Payel, Sofia; Hasan, Md. Anik

doi:10.1016/j.cscm.2022.e01625

Cited by 2 publications

(3 citation statements)

References 46 publications

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“…In a Bangladeshi case study, [36] investigated a solid waste management approach for handling leather buffing dust (LBD) that emerges in typical tannery units. LBD was mixed in various proportions ranging from 1% to 12%, in place of clay to produce bricks under high-temperature firing, and the final products were tested for their necessary physico-chemical and environmental properties according to ASTM standards.…”

Section: Recycling Tannery Sludge In Bricksmentioning

confidence: 99%

Proposal of an Encapsulation-led Disposal Method for Tannery Sludge – A Circularity Approach

Bhavani

et al. 2024

Civil and Environmental Engineering Reports

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In the context of achieving sustainable development goals, continuously pushing possible extended research and attempting to implement the respective outcomes in expanding a circular economy for a broad range of products are high priorities. In this paper, we considered disposable tannery sludge as a matter of concern and proposed an innovative framework for placing tannery sludge in the economic value chain via an encapsulation technique-based construction product development. We used polypropylene plastic and a cement-water matrix as encapsulation materials, and the encapsulated tannery sludge bodies were tested for their drop strength, water absorbing behaviour, ability to leach chromium and tendency to lose weight upon ignition. Value of water absorption for the prepared double layered encapsulated tannery sludge bodies was 1.332%, the drop strength performance index arrived was 90% and 0.0001 µg/g of Chromium leaching was found in Toxicity Characteristic Leaching Procedure (TCLP) and shown 67% weight loss in thermogravimetric (TGA) analysis. The results confirmed the possibility of ecocompatible disposal and recirculation of tannery sludge for the sustainable production of building blocks in the form of encapsulated bodies. The outcomes of our work add upon a new perspective to the existing literature regarding the environmentally positive utilization of tannery sludge in the production of building blocks.

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Section: Recycling Tannery Sludge In Bricksmentioning

confidence: 99%

Proposal of an Encapsulation-led Disposal Method for Tannery Sludge – A Circularity Approach

Bhavani

et al. 2024

Civil and Environmental Engineering Reports

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“…The above disadvantages make it difficult to manage the chrome-tanned solid waste from the leather industry in its untreated form. However, there are a number of reports that describe the direct management of this type of waste [2,6,[11][12][13][14][15]. Some of the research focuses on the possibility of energy recovery from these wastes using thermal processes such as combustion, pyrolysis, and gasification [2,6].…”

Section: Introductionmentioning

confidence: 99%

“…The use of tanning industry waste for the production of composite materials is also described in the literature. In this case, CTLS or leather dust is mixed with binders such as: thermoplastic or thermosetting polymers, elastomers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Chrome Tanned Leather Shavings Modification—Properties and Prospective for Future Application

Gendaszewska,

Pipiak,

Wieczorek

et al. 2024

Processes

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Chrome tanned leather shavings (CTLS) are considered one of the more difficult wastes to manage in the tanning industry. At the same time, this waste is an important source of good quality collagen. The few methods described in the literature for the valorization of these wastes usually require pre-treatment or activation. In this study, an attempt was made to see if raw chrome tanned leather shavings (CTLS) could be modified to obtain secondary raw materials with new physical properties. Glutaraldehyde, glycerol, EDCs, pectin, and tannins were selected for modification of the CTLS. The effectiveness of the processes carried out was confirmed by FTIR analysis of the materials obtained. Changes in the intensity of the characteristic collagen peak (amide I, amide II, and amide III) and changes in the position of the bands in the 1200–1000 cm−1 region were observed in the recorded spectra. The modifications introduced confirmed changes in the physical properties of samples M1–M5, including an increase in bulk density from 0.15 to 0.59 g cm−3, and improved tensile strength is some cases. The elemental content results of the samples tested showed the resulting modified CTLS were free of Cd, Hg, Pb, and Cr(VI). It was also confirmed tanning waste contained significant amounts of various valuable elements. The research also included preliminary tests to assess the environmental impact of the modified materials. In a phytotoxicity test conducted on modified CTLS, M1 with pectins showed the highest root stimulation (105%), while samples with glutaraldehyde and unmodified CTLS showed significant root inhibition (75%, 74%). Other samples showed moderate plant toxicity and seed germination was not significantly affected.

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Leather buffing dust in brick production: Solid waste management in tanneries

Cited by 2 publications

References 46 publications

Proposal of an Encapsulation-led Disposal Method for Tannery Sludge – A Circularity Approach

Proposal of an Encapsulation-led Disposal Method for Tannery Sludge – A Circularity Approach

Experimental Study on Chrome Tanned Leather Shavings Modification—Properties and Prospective for Future Application

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