Analysis Of German Printing And Dyeing Enterprises How To Achieve "Zero Emissions"

No waste water seems to be "Arabian Nights", but in Germany, the individual printing and dyeing enterprises actually achieved "zero emissions"! Recently, 57 heads of dyeing and printing enterprises in Shaoxing county took part in the "green printing and dyeing" Summit Forum. After listening to Dr. Yang Fei's introduction of foreign dyeing and printing wastewater treatment, they were shocked.

Compared with advanced countries, the gap is not general.

"Green" held by Shaoxing County

The summit forum aims at gathering talents' intelligence and developing "green printing and dyeing".

The forum invited experts, scholars and high-level talents at home and abroad from printing and dyeing industry associations and tertiary institutions to discuss with entrepreneurs the development trend, common problems and solutions of Shaoxing dyeing and printing industry, helping enterprises explore new paths such as technological innovation, energy saving and emission reduction, management and upgrading.

Dr. Yang Fei is an associate research fellow at the IWAR Research Institute of the University of Germany.

He introduced the new technology of printing and dyeing wastewater treatment and the German case introduction to entrepreneurs in Shaoxing county.

In Germany, printing and dyeing wastewater is divided by process and dyestuff characteristics. In China, printing and dyeing wastewater is usually a mixed process of various processes. There are both desizing wastewater and cooking wastewater in pretreatment stage, dyeing wastewater in dyeing process, printing wastewater and soap liquid waste in printing process, finishing wastewater in finishing process, and alkali decrement wastewater in polyester alkali silk alkali reduction process (a refractory organic wastewater).

The ingredients are complex and difficult to handle.

According to the introduction, due to the lack of concentration in the industry, Germany has adopted the mode of printing and dyeing mill to build its own sewage treatment plant, and its processing technology is relatively mature.

Due to cleaner production and reclaimed water reuse, printing and dyeing wastewater discharge is relatively small, and some factories even achieve "zero emissions".

Yang Fei said that the difference between domestic and foreign printing and dyeing wastewater treatment is reflected in the enterprise level, that is, the concept of clean production and the concept of resource recovery are different.

Foreign enterprises attach great importance to cleaner production, while domestic enterprises do not do well in this aspect and waste resources more than abroad.

In addition, the lack of environmental input is also domestic.

The weakness of enterprises.

The printing and dyeing products in developed countries are of high grade and high profits, so the investment in wastewater treatment is relatively high.