The Hidden Challenge of Leather Waste
Leather is one of the oldest and most durable materials known to humankind. Yet, its production generates a significant amount of waste. From raw hides and trimmings to shavings and buffing dust, every stage of the tanning and finishing process produces by-products. Globally, it’s estimated that 20–30% of a hide’s original mass can end up as solid waste if not properly utilized. Traditionally, much of this waste was sent to landfills, creating environmental and health challenges. The tanning process involves various chemicals—particularly in chrome tanning—that can make disposal complicated. However, the industry is changing rapidly, driven by innovation and a shared commitment to sustainability.
Turning By-products into New Possibilities
In recent years, circular economy models have taken root across the leather value chain. Instead of treating waste as a problem, tanners and researchers are reimagining it as a resource. Here’s how leather waste is being transformed:
Collagen recovery: Leather shavings and trimmings, rich in collagen, are now used to produce gelatin, bio-fertilizers, and even cosmetics.
Composite materials: Ground leather fibers are blended with natural rubber, polyurethane, or other polymers to make reconstituted or bonded leather, reducing the need for virgin hides.
Energy recovery: Some tanneries have installed anaerobic digesters and biogas plants, converting organic residues into energy to power their own operations.
Construction applications: Research is ongoing into using tanned leather waste in brick or tile manufacturing, where its thermal and binding properties enhance strength and insulation.
- The global leather industry produces around 4 billion pounds (≈ 1.8 million tons) of scrap leather waste every year. Much of this ends up in landfills or is incinerated.
- Production scrap is large: in footwear manufacturing, 20–30% of the leather used may be discarded during cutting/trimming processes.
- In tanneries, a high volume of waste is generated. For example:
- “The processing of 1 Mg (metric ton) of raw hides produces only about 200 kg of useful product, the rest being waste material.”
- The global recycled leather market is projected to grow from about USD 1.1 billion in 2025 to USD 1.7 billion by 2035, driven by environmental awareness and demand for eco-friendly materials.
- Leather Waste Recycling in Global Platform Cromwell Group (UK): Cromwell recycles 3 to 5 tons of leather fibers per day. These fibers are waste from shavings and trimmings from hide thinning (“shaving”) operations in tanneries. By turning those fibers into bonded leather products, they reduce landfill waste significantly.
- ELFA uses off-cuts, shavings, and trimmings (which are usually waste) to produce “composition leather” (a type of bonded leather) with a process that emphasizes environmental performance:
- They reduce natural gas use by 50-70% via thermal oxidisers that burn off-gases and feed energy back into the system.
- From one tonne of raw hide, only about 255 kg of finished, tanned leather results; the rest (~745 kg) becomes various wastes (trimmings, shavings, offcuts, etc.).
- ELFA’s approach seeks to reclaim a portion of those waste material
kEconock (India):
Indie luxury brand Econock uses scrap leather (oddly shaped and irregular remnants) as its core material. Their designs are also optimized to use what would otherwise be waste. For example, in their “Nora Tote Bag,” the base is made from waste leather, and the rest of the design is cut in ways that minimize leftover offcuts
Leather Waste & Recycling in Bangladesh
Gelatin and Industrial Protein from Tannery Waste
- Some factories in Savar collect chrome shaving dust and wet blue leather scraps.
- These are processed into gelatin and protein powders used in pharmaceuticals, food, and other industries.
- This reduces hazardous waste while creating new revenue streams.
Adhesives from Hide Trimmings
- Local enterprises produce shirish atha (animal hide glue) from hide scraps.
- It is widely used in bookbinding, furniture, and even shoe production.
- This practice converts waste into a useful industrial product.
Utilizing Rawhide By-products
- Horns, head skins, tails, and fat from raw hides are reused in different ways, such as brushes, capsule caps, and small leather goods.
- This reduces wastage and supports small-scale enterprises.
- The government has begun a “safe landfill” project in Savar, funded by the Bangladesh Climate Change Trust Fund, to better contain and manage solid waste from the leather sector so that soil and river pollution (especially the Dhaleshwari) is reduced.
Recycling & Innovation:
- Particle Boards, Biodiesel, Biogas: The Institute of Leather Engineering & Technology (ILET) at University of Dhaka, in partnership with The Asia Foundation, is piloting particle boards from leather shaving dust (shavings = one form of solid waste). This is a direct example of turning what would be waste into usable materials.
- a research paper explored using leather lime fleshing waste (which is rich in fats and proteins) as a substrate for biodiesel production. This helps address two problems: disposing of the waste, and generating renewable energy.
World Sustainability Day highlights the need to turn waste into worth. Globally and in Bangladesh, the leather industry is moving toward circular practices—recycling tannery waste into new materials and energy. With continued focus on innovation and responsible management, leather can truly become a model of sustainable industry.
Source: Source: Asia Foundation, ITS and
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