Printing And Dyeing Enterprises Use "Membrane" To Reduce Emissions

Physicochemical and biochemical treatment is our county printing and dyeing The average treatment cost of reclaimed water reuse technology widely used by enterprises is between 1.5 yuan and 2 yuan per ton. Meanwhile, one ton of printing and dyeing wastewater is also treated, Membrane treatment technology However, the cost is as high as 4.6 yuan. The operators of Shaoxing printing and dyeing enterprises, who have always been known for their shrewdness, are now happy to do this "loss making business", and have started printing and dyeing wastewater membrane treatment technology projects, becoming new highlights in the industry.

Membrane technology is highly sought after

In the "Shengxin Printing and Dyeing" of Binhai Industrial Zone, in addition to the busy workshop, the construction workers are stepping up the installation of new equipment on the 1000 square meters of vacant land in the plant. "This is a new reclaimed water reuse transformation technology - membrane treatment technology." The operator of Shengxin Printing and Dyeing Company said that the whole set of equipment is expected to be put into use at the end of August.

In three months, five printing and dyeing enterprises, including "Shumeite" and "Bailiheng", have successively signed cooperation agreements on membrane treatment technology with the Ningbo Branch of NORINCO. "Shaoxing printing and dyeing enterprises are very interested in membrane treatment technology and the way of cooperation with 'third party' management. In addition to these five enterprises signing the contract, many other enterprises have actively contacted us for consultation and negotiation." Zhou Yusong of the Ningbo Branch of the North Industries Research Institute revealed that due to the dramatic increase in Shaoxing's business, they have rented office space in Binhai Industrial Park and are ready to set up an office, Meet business development needs.

In addition to the cooperation with the Ningbo Branch of the North Weapons Technology Research Institute, many printing and dyeing enterprises have also introduced foreign advanced membrane treatment technologies. For example, "Zhiren Printing and Dyeing" has invested 8 million yuan in the expansion and transformation of the printing and dyeing wastewater treatment system and the advanced treatment of reclaimed water reuse, and has adopted the reverse osmosis membrane technology produced by Dow, which is planned to be put into use in September.

Double effects of emission reduction and water saving

Why do so many printing and dyeing enterprises like film technology? "3000 tons of pretreated wastewater will become clean water directly after membrane treatment." Zhang Guohua, operator of Sumite Printing and Dyeing Company, visited Suzhou, Ningbo and other places, and finally decided to adopt membrane treatment technology. He told reporters that this technology can reduce emissions and save water, which meets the requirements of energy conservation and emission reduction. For enterprises, this economic account "only earns, not pays".

Taking "Shengxin Printing and Dyeing" as an example, the wastewater membrane treatment technology project that is currently underway, the COD concentration in the clean water after treatment is reduced to less than 50mg/L, while the COD concentration in the river water is about 100mg/L, which can be completely reused in the industrial water of enterprises. If the price of industrial water is 1.15 yuan per ton, the average sewage discharge cost of wastewater pretreatment is more than 2.8 yuan per ton. Regardless of management costs such as labor costs, the cost of 1 ton of water is certainly higher than 4 yuan. The membrane treatment technology not only reduces its sewage discharge by 2/3, but also has obvious effects on emission reduction and water saving. For this reason, Shengxin Printing and Dyeing plans to launch the second phase membrane treatment technology. At that time, the company's emissions will be greatly reduced to achieve the goal of energy conservation and emission reduction.

Emission reduction is the driving force

"In addition to the remarkable effect of emission reduction and water saving, the pressure of environmental protection and emission reduction is also one of the driving forces that force printing and dyeing enterprises to actively seek upgrading of wastewater treatment." The relevant person in charge of the county environmental protection bureau said. Since last year, our county has taken a series of major measures, such as implementing the special action to clean up the construction projects of the printing and dyeing chemical industry, and the "last elimination" system for printing and dyeing enterprises with excessive incoming sewage. This year, our county has put more emphasis on the "tight curse" of printing and dyeing enterprises' sewage exceeding the standard, that is, the last row of sewage volume in the monthly inspection will be eliminated every three days.

Under the severe pressure of emission reduction, the printing and dyeing enterprises in our county actively seek a way out, actively upgrade the wastewater treatment technology, achieve energy conservation and emission reduction, and relieve the pressure of environmental protection. "The membrane treatment technology will play a decisive role in the printing and dyeing industry of our county, and even the whole county to achieve emission reduction," said the industry insiders.