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The industry has about 100000 tons of treated wastewater into the sea every day. Can these industrial wastes no longer flow into the sea and be reused for production in the face of pure water?

This is a major research topic that the printing and dyeing industry and related parties have considered for many years.

In recent days, the Shishi printing and dyeing industry is being used by the Huafeng company to use the technology of the reverse osmosis membrane which is currently recognized as the best technology in the field to carry out the pilot project of reclaimed water reuse. Once it is successful, it is expected to substantially improve the water reuse level of the Shishi printing and dyeing industry.

In the printing and dyeing industry of Shishi, many enterprises have carried out reclaimed water reuse to varying degrees. Due to technical reasons, the reclaimed water can not be completely matched with the indicators of tap water in terms of technical indicators. Most of the intermediate water and tap water mixing industries have tried to use the activated carbon adsorption method for the two treatment of recycled water, but the practical effect is very small.

The reverse osmosis membrane separation technology developed in material science, unlike chemical methods, can produce new substances without generating two pollution.

Ways of handling.

The pformation of scientific and technological achievements into productive forces has three essential links: small scale (laboratory test), pilot scale (intermediate test) and large scale (productive test). The success or failure of industrialization depends largely on the effect of pilot test. After the pilot test is successful, it can basically be produced.

The pilot test was based on the discharge of printing and dyeing wastewater. The membrane treatment cycle of subfiltration and ultrafiltration was used to filter out all kinds of useless components. At the end, the effluent reached the target of running water. The pilot scale was daily processing capacity of 20 tons, so as to achieve printing and dyeing water in the future.

Objective to establish reliable technical data base.

A large number of difficult to degrade substances such as sulphide, reactive, direct and cationic dyes are used in the process, and a large amount of auxiliaries, surfactants and other auxiliaries are used. The composition is extremely complex. Although it has reached the discharge standard treatment in one treatment, even if it is processed in traditional way for the two time, because many substances are in ionic state, it is difficult to treat them as pure tap water.

Shishi an enterprise once reclaimed water for use on the boiler, resulting in scaling due to too hard water, which almost caused the danger of boiler explosion.

Wang Bin, chief executive of the technology company of the state of technology, is preparing for the pilot preparation. The pilot plant is ready to work hard. The purpose is very clear, so that printing and dyeing wastewater can be reduced to pure water, especially chromaticity, BOD, COD, softening degree and other indicators.

But what is the final result of the pilot test?

People will wait and see.

This pilot test is of great significance. Once it is successful, it will advance the goal of improving the reuse level of the recycled water in the Shishi printing and dyeing industry and make full use of zero discharge.

Editor in chief: Wang Xiaonan