Biochemical Treatment Technology Is The Leading Technology Of Denitrification In Tannery Wastewater.

Tannery wastewater has seriously damaged the balance of ecological environment due to its large fluctuation of water quality, high nitrogen content and high toxicity. It has been paid more and more attention by researchers. Researchers have actively studied their processing technology and sought a highly efficient, economic, environmental and sustainable treatment mode.

High N content is one of the difficulties in tannery wastewater treatment.

The highest concentration of ammonia nitrogen in wastewater is deashing and softening process, which is the primary source of ammonia nitrogen pollution in tannery wastewater.

Another source.

Because tannery wastewater has good biodegradability and the degradation of ammonia nitrogen by biological treatment is complete and the operation cost is low, biochemical treatment technology has become the leading technology of tannery wastewater denitrification.

Three phase separators were invented through the physical structure design and the difference of gravitational field effects on different substances.

The retention time of activated sludge is separated from the residence time of wastewater, forming the prototype of the upflow anaerobic sludge blanket (UASB) reactor.

along with

With the development of technology, UASB technology has been applied to the treatment of high concentration organic wastewater.

Zhu Mingshi and so on studied anammox UASB reactor, anammox UASB biofilm reactor under the same influent conditions and temperature control conditions, achieved stable nitrogen removal. The removal rates of NH 4+ - N, NO 2-- N and TN were maintained at 99.9%, 99.9% and 90% respectively, and the pH value of effluent remained at 8.5 near stable operation stage.

Although UASB has been widely used in China, there are still many problems to be solved.

The normal metabolism is inhibited.

Biofilm culture was beneficial to the accumulation of ANAMMOX bacteria. The UASB biofilm reactor was significantly better than the conventional UASB reactor without biofilm.

In mid 11 2003, the feasibility, design parameters and operating conditions of UASB/ SR technology were discussed and evaluated. The UASB/ SR technology had changed the traditional concept of environmentalists in China, broke the shackles of traditional physicochemical pretreatment of tannery wastewater, and pioneered the successful application of anaerobic technology in tannery wastewater treatment.

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Ecological design is the urgent requirement to enhance the competitiveness of products.

Under the increasing pressure of global resources and environment, the provision of green products has become an international trend and trend.

Our country also needs to accelerate the product ecological design work, develop and manufacture green environmental protection products that meet the needs of the international market, and improve the international competitiveness of products.

Enterprises are the main body of ecological design of industrial products.

In recent years, with the guidance and support from relevant ministries and commissions such as the Ministry of industry and commerce, many traditional industries have begun to take ecological design as an important means for enterprises to achieve sustainable development and enhance their core competitiveness.

The implementation of the second batch of industrial products eco (green) design pilot enterprises in the Ministry of industry and information is being publicized on the website of the Ministry of industry and information, and 58 enterprises are from traditional industries such as light industry, textile, machinery and equipment, building materials and so on.

Last year, the Ministry of industry and Commerce launched a pilot project for demonstration projects of industrial product eco design. It encouraged the pilot enterprises to consider the impact of products on the environment and resources in the whole life cycle from the design of the scheme, so as to consider the whole life cycle in raw material selection, production process, green consumption and effective recycling.

Wan Shi Li Group Co., Ltd. is a leading enterprise in the silk industry. It is recommended by the China Textile Industry Federation and has become the first batch of industrial product eco design demonstration enterprises.

"Silk whole life process is green and environmental protection, but in the process of product processing, harmful substances will inevitably enter, such as printing and dyeing links."

Tu Hongyan, chairman of the board of directors of Wan Shi Li group, said: "therefore, we insist on product ecological design and development, avoid the application of non ecological process technology in design, and require suppliers to promise not to use non ecological dyes and chemicals in the entire supply chain".

At present, it has successfully constructed the three stages of the whole life cycle of silk fabric, "ecological requirements of supply chain - Green Ecological printing and recycling", and developed the industrial silk recycling technology. It has realized the circulation of silk waste, zero waste discharge and pformation of waste into treasure.

Adhering to the concept of green development, from source to design to production, let everything take the initiative to realize pformation and upgrading, and become the high-end brand of China's silk industry.

To speed up the implementation of green manufacturing is to strengthen the green management of product life cycle and innovate traditional design, manufacturing technology and production mode.

Gao Yunhu, director of the energy conservation division of the Ministry of industry and commerce.

It is reported that the Ministry of industry and industry is currently studying the compilation of the "green industrial development plan for 13th Five-Year" and the "green manufacturing engineering implementation plan". The implementation of eco green design is an important content. It will speed up the formulation of green product evaluation standards and publish a batch of green production names according to the standards, and strive to develop and popularize ten thousand green products by 2020.

Technology supports green manufacturing. "Green manufacturing should be carried out in an all-round way. We should organize green manufacturing projects as an important breakthrough point, and vigorously promote green, low-carbon, recycling and intensification. In particular, we should focus on the implementation of green technology innovation leading projects."

Mao Weiming, Vice Minister of the Ministry of industry and commerce, pointed out that

Data show that the energy efficiency and water efficiency of traditional industries in China still lag far behind those in developed countries.

Among them, the domestic average energy efficiency level of the steel industry is 6% to 7% behind the international advanced level, and the building material is lagging behind about 10%, and the petrochemical industry is lagging behind 10% to 20%.

Under the current domestic and international economic situation, the traditional industries have entered the platform stage from production capacity to development mode. From another point of view, it is also an opportunity to implement structural adjustment and promote pformation and upgrading.

As a result, "made in China 2025" puts a more prominent position in speeding up the construction of an efficient, clean, low carbon, recycling green manufacturing system.

In order to achieve green manufacturing, strengthen energy conservation and emission reduction, and promote pformation and upgrading, traditional industries are important support for continuous innovation and application of green technology and intelligent technology. Accelerating technological pformation is an important means.

Industry enterprises are also generally aware of this. In recent years, the pace of green manufacturing technology innovation and industrialization has been speeded up, and the construction of green parks has been accelerated.

Huaxin Cement (600801, stock bar) Limited by Share Ltd, founded in 1907, is known as "the cradle of China's cement industry".

Although it is a 100 year old enterprise, Huaxin Cement actively adapts itself to the new normal of economic development. On the one hand, it actively develops green cement products, on the one hand, focuses on developing green equipment independently, and pays close attention to technological independent innovation and achievements pformation and application, and goes out of a road of independent innovation and green development.

The company has continuously intensified its technological pformation efforts, and has now completed the technical pformation of all the cement kiln line denitrification system to achieve 60% reduction in total nitrogen oxides.

When it comes to the next stage of the green development stage of the enterprise's scientific and technological innovation, the relevant person in charge of the company said, "we will fully promote the development and application of key technologies in the key areas of cement industry, such as harmless disposal of cement kilns, etc., and welcome the golden age of rapid development of environmental protection business based on cement kiln collaborative disposal technology, and build a green industrial economy with independent intellectual property rights of Huaxin."

At the same time, we will continue to strengthen the research and development of equipment technology, focusing on improving the development of environmental protection equipment, thermal equipment of cement kiln and improvement and upgrading of cooling equipment. Not only will we expand and occupy the high-end equipment market in the cement industry, but also will be extended to other industries such as chemical industry and power industry.

According to the reporter, improving the green manufacturing service system and increasing the green pformation of traditional manufacturing industry is one of the key tasks of the Ministry of industry this year.

China will comprehensively promote the green pformation of key industries such as iron and steel, nonferrous metals, chemicals, building materials, paper making, printing and dyeing, accelerate the research and development of new generation of recyclable process technology, and vigorously develop and popularize technologies with functions such as energy efficient utilization, pollution reduction, waste resource utilization and harmless treatment.