At present, China is the largest leather manufacturing country in the world. Its output and export volume rank first in the world. At the same time, it has also promoted the development of related industries such as "a target=" _blank "href=" //m.pmae.cn/ "and" leather /a ".

However, the leather industry has a large amount of sewage and complex sewage components, becoming one of the thirteen key polluting industries in the state.

The relevant responsible person of the Ministry of environmental protection pointed out that in 2009, the wastewater discharged from the leather industry was about 1.38 billion tons, chemical oxygen demand (COD) of about 30 thousand tons, ammonia nitrogen 7300 tons, and total chromium (trivalent chromium) 6.72 tons.

The 2012 annual environmental statistics annual report shows that the total chrome emissions of leather, fur, feather and its products and manufacture < a target= "_blank" href= "//m.pmae.cn/" > shoes < /a > are about 74 tons, ranking second in all industries, accounting for 39.2%.

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< p > although the leather industry is seriously polluted, there has been no industry specific emission standard before.

For example, the current wastewater discharge in leather industry is implemented according to the comprehensive wastewater discharge standard (GB8978-1996). Because the comprehensive sewage discharge standard does not fully consider the characteristics of the leather industry, the emission standards are relaxed, the entry threshold is low, and the pertinence is not strong, which is obviously not conducive to the pollution control and management of the leather industry.

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< p > the "standard" fully considers the characteristics of leather industry and defines the limits of pollutant discharge.

The standard stipulated the direct and indirect emission limits according to the technical level of water pollutants treatment in the industry. For some key areas, the special limit of water pollutants with higher discharge requirements was specified.

Taking existing enterprises as an example, the direct emission limit of ammonia nitrogen in leather making enterprises is 35 mg / liter, while the direct emission limit of ammonia nitrogen in fur processing enterprises is 25 mg / litre.

For indirect emission enterprises, the emission requirements of most pollutants indicators (such as COD, BOD5, ammonia nitrogen, etc.) are tightened.

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< p > overall, the discharge requirements of most of the new standards are raised, so the volume of pollutants discharged from the industry will be reduced after the implementation of the standards.

According to the Ministry of environmental protection, the total emissions of COD and ammonia will be reduced to 11800 tons and 2380 tons respectively, 57.2% and 67.4% less than that in 2010.

The new standard has improved the entry threshold for industries. The implementation of the new standard will speed up the elimination of backward production capacity, and urge a group of enterprises with backward production equipment, low technological level, imperfect environmental pollution control facilities, and small and weak enterprises to withdraw from the market, so that resources can be gathered to the dominant enterprises, and the "forced" industry will accelerate pformation and upgrading.

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< p > the China Leather Association's "12th Five-Year" development plan, compiled in 2010 by the China Leather Association, aims to pform China from a big leather country to a leather power country.

At present, China's leather industry has entered the period of industrial upgrading. Through technological innovation, improving the added value of products and developing green ecological leather are the future development trends.

In the face of tighter environmental protection, market share of industry leading enterprises is expected to further improve.

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