Clean Leather Technology Has Achieved Remarkable Results In Application And Development.

China is a big tanning country.

However, the tannery production process is seriously polluted. Among them, the chemical oxygen demand (COD), biochemical oxygen demand (BOD) and suspended matter (SS) in the preparation section account for more than 70% of the whole leather making process. Ammonia nitrogen, S2- and lime account for 95-100%, and water consumption accounts for 60-70%, which is the main source of tannery pollution.

It is very important to adopt advanced and practical integrated technology of cleaner production for leather cleaning, to eliminate or reduce tannery pollution from the source, and to promote healthy, stable and sustainable development of the industry. At the same time, it is also conducive to the recycling of waste collagen and wool and the development of leather recycling economy.

In 11th Five-Year, the national science and technology support project "the application of clean leather making process and green industry linking technology" successfully developed key technologies such as sodium sulfide, wool free hair removal, sodium free caustic soda technology and ammonia free deashing technology based on enzyme preparation, and realized integrated application, forming a new circular economy mode of pollution source control and integrated emission reduction.

At the same time, new technologies for pforming the recovered wool and waste collagen into tanning chemical materials and series of environmental protection materials were developed and industrialized applications were realized.

At present, 15 pig, cattle and sheepskin tanning enterprises in China have adopted this achievement. According to statistics, the amount of tannery water has been reduced by 30%, ammonia nitrogen and sludge have been reduced by 80-90%, and the average COD, BOD and SS in wastewater has decreased by 40%.

Next, we plan to develop a series of key technologies, such as a series of proprietary enzymes, with independent intellectual property rights through 5 years' time, and set up a strategic alliance consisting of scientific research units tannery enterprises and leather chemical enterprises, to realize the same step optimization from key chemical materials to applied process technology, mobilize all aspects of enthusiasm, accelerate the large-scale industrialization pformation of the results, and prompt the achievement to radiate quickly.

Editor in chief: Xu Qiyun