"Reverse Attack" Of Silk Waste: The Project Won The National Science And Technology Progress Award In 2013.

Less than p ago, the "Sericin Recycling and comprehensive utilization key technology and industrialization" project was jointly completed by Soochow University, Xinyuan cocoon silk group Limited by Share Ltd, Zhejiang Sci-Tech University, Suzhou membrane Hua Mstar Technology Ltd, Huzhou Southern Biotechnology Co., Ltd., Huzhou Huzhou Biotechnology Co., Ltd. and Xinghua Dadi blue silk spinning Co., Ltd., which won the 2013 National Science and Technology Progress Award (general project) two.

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< p > < strong > > divide into two and achieve the goal of turning waste into treasure. < /strong > < /p >

< p > China is a large silk country, producing about 150 thousand tons of raw silk every year. The total amount of sericin produced by degumming is about 35 thousand tons.

Restricted by filtration technology, wastewater containing large amount of sericin is discharged directly, which not only causes environmental pollution, but also wastes a lot of valuable sericin resources.

The recovery and comprehensive utilization of sericin has always been a major research topic in the cocoon and silk industry at home and abroad, but it has never been able to solve the problem of emission reduction, industrialization production and high dissolution rate.

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< p > decompose a cable and get metal conductor and insulation surface.

Now, according to this idea, silk waste from silk enterprises can be decomposed into real gold and silver.

After the decomposition of silk waste into < a href= "http://www.91se91.com/news/index_c.asp > sericin > /a > silk fibroin, it completely broke away from the traditional application concept of silk.

These two proteins have become the raw materials of high-grade cosmetics and health products, and they can also become new materials for sand fixation and water conservation.

Soochow University professor Sheng Jiayong said.

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< p > unlike the silk products we have seen before, the silk products in Huzhou Australia Chemical Co., Ltd. are two fine particles of white powder.

"Even silk waste is made up of external sericin and internal silk fibroin. In this way, we divide the silk into two by separating technology."

Shen Xinqi, chairman of the company, said.

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< p > < strong > basic research completed the key device < /strong > /p >

< p > silk waste can turn waste into treasure. The key lies in the successful research of decomposition technology of silk.

Soochow University, Zhejiang University and other scientific research departments have been working with related enterprises for more than 4 years to solve this problem.

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According to Xing Tieling, an associate professor of the school of textile and clothing engineering, Soochow University, the main innovations of the project include: first, the research and development of the integrated silk degumming wastewater treatment and sericin recovery technology, which combines the technology of isoelectric precipitation with ultrafiltration and nanofiltration, has achieved the high proportion recovery of sericin. Secondly, the key equipment for recovering sericin from degumming wastewater has been developed, and the technical problems of ultrafiltration membrane pollution and plugging have been solved. The efficiency and automation of sericin recovery have been improved, and large-scale production has been realized. Finally, a variety of deep-processing products with sericin as raw materials have been invented, and the application technology of products has been developed, and the comprehensive utilization of sericin products has been promoted. < p >

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< p > > Xinyuan < a href= "http://www.91se91.com/news/index_c.asp" > cocoon silk > /a > group Limited by Share Ltd and Soochow University. Through the study of basic materials such as molecular weight of sericin, ultrafiltration membrane and crosslinking agent for Sericin textile coating, the technology of industrial recovery of sericin has been invented, and the key equipment for recovering sericin from degumming wastewater has been designed. The sericin applied technology and technology have been developed. In order to effectively prevent degumming wastewater from polluting the environment, we have realized the full utilization of sericin, a valuable natural protein.

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< p > strong > high profits attract the enterprise eyeball < /strong > /p >

< p > this technology not only turns waste into treasure, but also basically eliminates pollution problems caused by waste treatment of silk waste. After purification, sericin is applied to cashmere products to improve its moisture absorption and heat preservation performance. Sericin concentrate can replace the fish meal with higher cost to make compound feed for special fish culture; sericin surfactant added to bath liquid can effectively improve skin nutrition.

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< p > according to the introduction, the traditional method of treating 1 tons of silk waste will produce 3 tons of waste water.

According to the decomposition of the new technology, every ton of silk waste can not only save 3 tons of water resources, but also decompose 250 kilograms of sericin and 500 kilograms of silk fibroin.

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< p > the decomposed < a href= "http://www.91se91.com/news/index_c.asp" > silk waste > /a > is also soaring in value.

At present, the purchase price per ton of silk waste is about 55 thousand yuan, while the price of sericin and silk fibroin is as high as 300 thousand yuan per ton.

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< p > according to Dai Xianglian, chairman of the earth blue company, "at present, 200 kg of sericin powder can be extracted every 12 hours from the degumming wastewater purification project of Xinghua Dadi blue silk spinning Co., Ltd.

The content of sericin in degumming wastewater is 20%.

The annual output of 1000 tons of spun silk can be effectively extracted and recovered from 130 tons of sericin from degumming wastewater.

At present, the price of sericin powder in the international market is about 340 thousand yuan, and the cost of extracting 1 tons of sericin powder is 120 thousand yuan. The profit of a ton of sericin protein powder is about 200000 yuan. The company can get 26 million yuan income from the degumming wastewater in one year.

According to Chu Chengping, chairman of Xinyuan group, up to now, the technology has increased 215 million yuan in recent 3 years.

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< p > it is understood that the technical achievements of the project have been used in the preparation of sericin recovery and high purity soluble silk powder in Xinyuan cocoon silk group Limited by Share Ltd and Xinghua Dadi blue silk spinning Co., Ltd.

The products developed in Jiangsu Xin Fang Textile Group Co., Ltd. and Jiangsu Zhongrun Agricultural Development Co., Ltd. are used for coating and finishing of cashmere fabrics and special aquaculture (Chinese sturgeon and Fugu).

Several major application enterprises have realized a new increase in production value of 144 million yuan, 24 million 130 thousand yuan in new profits, 11 million 480 thousand yuan in taxes and 1 million 700 thousand dollars in foreign exchange earnings.

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