Ultra-Low Water Liming Process

• Conventionally, the tanners employ around 300-400% water during the liming process
• The generation of enormous quantities of wastewater containing eco-sensitive chemicals contributes to pollution loads
• Currently, there are no innovative processes available, which can bring about a reduction in water usage
• This technology employs ultra-low quantity of water during liming, based on maintaining a concentration gradient approach

• The reduction of the usage of water coupled with reduced offer of chemicals during the process enables a significant reduction in pollution load
• Reduced discharge of wastewater and conservation of the water for industrial usage
• Ultra-low water based liming (ULWL) process was fine-tuned at pilot scale and validated at the commercial scale in a commercial tannery

• The use of ultra-low water during pre-tanning was optimized
• Water reduction by 75%
• Reductions in COD, TDS, Alkalinity and sulphide by 19, 15, 20 and 88%, respectively