Tanning Enterprises Need To Start From Three Aspects To Achieve New Standard Emissions.

According to statistics, leather making and fur industry is the third major pollution industry after light industry's relay paper making and food brewing industry. Leather making and fur processing are quite complicated chemical and physical processing processes. There are many kinds of chemical materials involved in the process, and hundreds or even hundreds of chemicals are involved, and many processes in the processing process are carried out under water conditions. This directly causes the industry to have a large amount of sewage and complex sewage components, while the waste water discharged from the original leather industry refers to the comprehensive wastewater discharge standard (GB8978-1996). The characteristics of the leather industry are not fully considered. The emission limits are loose, the threshold for entry is low, and the pertinence is not strong, which is not conducive to environmental protection and the pollution control management of the leather industry. Leather industry is a traditional industry in China. It is also classified as heavy pollution.

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After soliciting opinions, the environmental protection standard issued by the Ministry of environmental protection issued by the Ministry of environmental protection in December 2013 (GB30486-2013) stipulated in detail the requirements for monitoring and monitoring the discharge of water pollutants in tanning and fur processing enterprises, and increased the control indicators of specific pollutants such as total nitrogen and chloride ions, and perfected the highest permitted discharge quota.

Standard requirements for leather and fur new enterprises since March 1, 2014, the existing enterprises since July 1, 2014, their water pollution discharge control according to the new standard requirements, no longer implement the 1996 comprehensive sewage discharge standard (GB8978-1996).

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The water pollution discharge standard of fur industry is more targeted. It is a set of standards based on the actual situation of leather and fur industry in China. It defines 13 pollution factors, namely pH value, chroma, chemical oxygen demand (CODcr), five biochemical oxygen demand (BOD5), suspended matter (SS), ammonia nitrogen, total nitrogen, total phosphorus, animal and vegetable oil, sulphide, chloride, total chromium and six valent chromium. Meanwhile, it limits the requirement of unit product drainage and so on. It also makes a sub requirement for the enterprises directly discharging and indirectly discharging two kinds of emission forms, and also stipulates the special discharge limits of water pollution in key areas. Leather making

Generally speaking, the new standard has been equivalent to the average emission control level of developed countries, and is the most stringent standard in leather industry and fur processing industry so far.

Leather enterprises should not only meet the emission requirements of new standards, but also need to meet the increasingly complex environmental requirements of different markets and customers. It is suggested that preventive and whole process control measures should be taken in the whole process of product life cycle, and efforts should be made in source control, process management and terminal management, so as to increase input and management.

1. control source is the main: leather production from raw leather preparation, tanning, finishing and other sections until the finished leather, a wide range of processes, the use of chemical materials complex.

To clarify the screening criteria of raw materials and chemicals, strengthen screening efforts, and do well in hazard assessment and environmental risk assessment, can not only reduce or avoid the introduction of toxic and harmful substances, but also improve the utilization rate of raw materials, reduce pollution and ensure that products meet environmental requirements.

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End: from the end of pollution control, we should increase capital investment, upgrade and pform sewage treatment facilities, strengthen the comprehensive treatment of sewage and classify wastewater treatment technologies. For example, in order to ensure the stable discharge of CODcr, ammonia nitrogen and total nitrogen, the biochemical treatment unit recommends anaerobic aerobic biological denitrification technology and other technologies for advanced treatment.

3., strengthening process management: we should attach importance to the use of cleaner production technology, adopt less waste, no waste production technology and efficient production equipment, such as adopting high absorption tanning agent and less chrome tanning, and adding vegetable tannin in Retanning Process without or using less chrome tanning agent, not only can greatly reduce the discharge of chromium, but also greatly reduce the risk of exceeding six standard chromium. At the same time, in the aspect of soft power construction, we should strengthen the construction and management of personnel consciousness, personnel capacity, key process control and management system.

As the leader of green supply chain solutions, SGS has been committed to providing one-stop service to leather enterprises. Apart from traditional inspection and testing services (mainly for raw materials, semi-finished products and finished products, waste water, etc.), quality management systems and environmental compliance audits, it is worth mentioning that the concept and method of 4C hazardous substances management and control launched in recent years are controlled and managed around upstream control, process supervision, final product inspection, environmental monitoring and management, etc., which can help leather enterprises to understand their own situation in many ways, strengthen environmental protection, guide cleaner production, and actively respond to new requirements of environmental protection.