Dr. Zhang Zongcai: Clean Leather Technology Can Help Enterprises Achieve Environmental Protection Standards.

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Since last year, China's environmental protection efforts have been gradually intensified. Heavy pollution, < a href= "http://sjfzxm.com/news/index_s.asp" > manufacturing industry < /a > is facing the pressure of structural adjustment and industrial upgrading. "P"

Under the heavy encirclement of justice, environmental protection standard and industry standard, the tannery industry, which is in heavy pollution industry, how to go to green development path rapidly through support of innovation and technology, technology and so on. Zhang Zongcai, deputy director of the National Engineering Laboratory of clean leather technology, professor and doctor of biomass and Leather Engineering Department of Sichuan University textile and light Institute, told reporters in an interview with China Leather net: "at present, domestic technology R & D can be regarded as a leading position in the world, and it can completely support the technological conditions needed by enterprises in cleaner production process improvement."

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< p > < strong > the environmental standards and specifications for leather making have been introduced successively, and the pressure is highlighting < /strong > /p >

< p > referring to the implementation of the latest judicial interpretation of the "two high" environmental pollution cases in June last year, and the promulgation of the March "tanning and fur processing industrial water pollution discharge standards" and the promulgation of the "tannery industry standard conditions" in June 1st this year, Zhang pointed out that the implementation of the new standard can not only further arouse the awareness of environmental protection of enterprises, but also promote the improvement of clean technology in tanning enterprises.

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< p > according to the press, the current control requirements for water pollutants in leather and fur processing industry are less than a href= "http://sjfzxm.com/news/index_s.asp" > emission standard < /a >. The overall control requirement is equivalent to the average emission control level of developed countries.

After the implementation of the standards, it is estimated that the total COD and NH3-N emissions will be reduced to 11800 tons and 2380 tons respectively, 57.2% and 67.4% less than that in 2010.

This is a clear goal and a difficult task for enterprises with high pollution.

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< p > Zhang Zongcai believes that there is an important difference compared to the previous discharge standards of water pollutants, that is, the discharge index of chromium.

Although the amount of waste water discharged from tanning plant is not large, chrome tanning agent can not be completely absorbed by leather, so the trivalent chromium concentration in chrome tanning waste liquor is relatively high.

He said: "trivalent chromium is proved harmless to human beings and animals, but according to the regulations of environmental protection department, chromium is still heavy metal and is strictly controlled.

New emission targets are usually difficult for tanneries to meet their requirements.

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< p > < strong > clean leather making process and environmental protection material are not difficult to achieve standard < /strong > /p >

< p > at present, there are more than 10 thousand small and medium-sized leather enterprises in China: a href= "http://sjfzxm.com/news/index_s.asp" > tannery enterprises. According to the new standards and environmental regulations, the fact that enterprises fail to meet the standards can not be changed.

Because of this, tanning enterprises must strictly grasp the management of the production process and adopt strict standardized process to achieve cleaner production.

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< p > "if every process is processed according to the standard, it can reduce the discharge of chromium, and it can still be achieved."

Zhang Zongcai added that the well-known large enterprises in China had already taken the lead step by step, using advanced clean leather technology to reduce sewage discharge, and now they can achieve national environmental standards.

According to Zhang Zongcai, at present, domestic R & D power can fully support the technological conditions needed for the improvement of cleaner production processes, and can be regarded as a leading position internationally.

For example, he explained that the domestic ash free depilation process uses organic or inorganic alkali instead of lime. Although the cost of materials is more expensive, the cost of sewage treatment will definitely decrease, and the overall investment is not particularly high. At present, the electrocoagulation technology being studied by Sichuan University is applicable to the recycling of waste water with a large amount of salt.

It is understood that at present, many enterprises in the industry have contacted Sichuan University to request cleaner technology. Sichuan University, in addition to training and exporting outstanding graduates to enterprises to improve the level of new technology and new technology, can also tailor cleaner production plan according to the product characteristics and production conditions of the enterprise.

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< p > Zhang Zongcai suggested that enterprises could consider using advanced green chemicals in the production process directly, or cooperate with universities to develop cleaner production processes, so as to improve the technology of environmental protection and reduce the discharge of sewage.

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