Leather industry is an industry which easily produces toxic and hazardous substances, especially Cr and other hazardous substances. Leather is denatured and nonperishable animal skin produced through dehairing, tanning, physical and chemical processing procedures. Leather is composed of natural protein fibers tightly woven in a three-dimensional space. Its surface is with a special particle surface layer featured in natural grain line, gloss and comfortable hand feel. Leather is an indispensable item in modern social life. However, leather industry also produces a large amount of waste water and sludge, which requires deep treatment. Leather sewage treatment produces a large amount of leather sludge. Materials used in leather processing process are mostly additives, lime, sodium sulfide, ammonium salts, vegetable tanning agents, acids, alkalis, proteases, chrome tanning agents, neutralizing agents and etc. Therefore, COD content is large, which seriously affects the environment. According to relevant national regulations, leather sludge needs to be uniformly recycled by qualified companies. For large-scale leather companies, expense caused by leather sludge treatment is a heavy burden. TAEDA recommends leather sludge disposal units use leather sludge dryer to reduce sludge quantity, moisture content and weight so that to control recycling costs.
At present, main treatment method is to remove toxic and harmful ingredients after drying and then use them as resources. TAEDA can design drying plan according to customers’ resource-recycling technology route. In terms of leather sludge drying and quantity reduction, Zonelion Taeda recommends following drying technologies and equipment that have been optimized for many years and have enjoyed great popularity: low temperature belt drying system, low-temperature exhaust heat drum drying system, steam rotary drum drying system, drum sludge drying system and air swept rotary wing drying system. You can click on the "Recommended Process" below for details of above dryer and corresponding technologies. You can also call us directly for quotation and technical support.

* Three-new and three-speciality advantage Three-new advantage: form long-term cooperative relations with universities and scientific research institutions to provide new technologies, new ideas and new directions. Three-specialty advantage: Professional manufacturing and R&D on drying equipment, combination with professional testing institutions and cooperation with professional research and design institutes. We can provide full-process services from project planning, blueprint design to finished product testing, environmental assessment and laboratory construction.
* Three-deep advantage: Production line holds wide application range and can cover each circle. Process details and equipment design are deeply optimized based on multiple working cases, different projects and years’ R&D.
* Three-large and three-low advantage: Taeda holds large standard mechanical manufacture base establishes cooperation with universities and professional institutes. Taeda also have multiple large automatic manufacture processing lines featured in safe running, no explosion-proof risk and no need nitrogen charging operation. During sludge drying process, oxygen and dust content are low and material temperature is low. Moisture of final sludge is low (can be adjusted between 10-40%) and it can meet different processes.
* Three-longitude advantage: It can realize aim of quantity reduction, stabilization, harmlessness and recycling for sludge in leather plant. Final products can be made into fertilizer, fuel, incineration, construction material, biological fuel, landfill and land utilization.

• Low-temp Belt Drying System
• Exhaust Heat Drum Drying
• Steam Rotary Drying System
• Rotary Drum Drying System
• Air Swept Drying System