Printing and dyeing enterprises by "membrane" emission reduction

Physicochemical and biochemical treatment is the reuse technology of reclaimed water widely used by printing and dyeing enterprises in our county, and the average treatment cost per ton is between 1.5 yuan and 2 yuan. For the same treatment of a ton of printing and dyeing wastewater, the cost of membrane treatment technology 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 "money-losing business" and have embarked on printing and dyeing wastewater membrane treatment technology projects, becoming a new highlight in the industry.

Membrane technology is highly sought-after

In the "Shengxin printing and dyeing" in the coastal industrial zone, in addition to the busy workshop, the construction workers in the factory of more than 1000 square meters of open space are stepping up the installation of new equipment under the hot sun. "This is a new reclaimed water transformation technology - membrane treatment technology." Shengxin printing and dyeing company operators said the entire equipment is expected to be put into use by the end of August.

Within 3 months, five printing and dyeing enterprises such as "Shumet" and "Bailiheng" have signed a membrane treatment technology cooperation agreement with the Ningbo Branch of Weapons Science and Technology Research Institute. "Shaoxing printing and dyeing enterprises are very interested in membrane treatment technology and the use of 'third party' management of cooperation, in addition to these five enterprises signed, there are many enterprises that take the initiative to contact us, consultation and negotiation." Zhou Yusong of the Ningbo branch of the North Science and Technology Research Institute revealed that due to the sharp increase in business in Shaoxing, they have rented office space in the Binhai Industrial Zone and are ready to set up an office to meet the needs of business development.

In addition to cooperation with the Ningbo branch of the Weapons Science and Technology Research Institute, many printing and dyeing enterprises also introduced foreign advanced membrane treatment technology, such as "Zhiren Printing and Dyeing" invested 8 million yuan to expand and transform the printing and dyeing wastewater treatment system and the advanced treatment of recycled water, using the reverse osmosis membrane technology produced by the United States Dow Company, which is planned to be put into use in September.

Reducing emissions and saving water

Why are there so many printing and dyeing enterprises using hot film technology? "After 3,000 tons of pretreatment wastewater is treated through the membrane, 2,000 tons will directly become clean water." Shumet printing and dyeing company operator Zhang Guohua to Suzhou, Ningbo and other places after investigation, to finalize the use of membrane treatment technology. He told reporters that the technology emission reduction and water saving, in line with the requirements of energy conservation and emission reduction, for enterprises, this economic account "only make no loss".

Taking the wastewater membrane treatment technology project currently being launched by "Shengxin Printing and Dyeing" as an example, the COD concentration in the treated water is reduced to less than 50mg/L, while the COD concentration in the river water is about 100mg/L, which can be reused in the industrial water of enterprises. According to the price of industrial water 1.15 yuan per ton, the average sewage cost of wastewater pretreatment is more than 2.8 yuan per ton, without considering the management costs such as labor, the cost of 1 ton of water is definitely higher than 4 yuan, and the membrane treatment technology not only reduces the amount of pollution by 2/3, and the effect of emission reduction and water saving is obvious. To this end, "Shengxin Printing and Dyeing" plans to mount a second phase of membrane treatment technology. At that time, the amount of pollution discharged by the company will be greatly reduced, and the goal of energy conservation and emission reduction will be achieved.

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 forcing printing and dyeing enterprises to actively seek wastewater treatment upgrading." County Environmental Protection Bureau's responsible person said. Since last year, our county has taken a series of major measures to control pollution with an iron hand, such as the implementation of special actions to clean up the construction project of the printing and dyeing chemical industry, and the "last place elimination" system of excessive sewage in the pipe of printing and dyeing enterprises. This year, our county and printing and dyeing enterprise's sewage standard more heavy "tight spell", that is, a row of pollution detections every month the last elimination change every 3 days.

Under the severe pressure of emission reduction, printing and dyeing enterprises in our county are seeking a way out, actively upgrading wastewater treatment technology, achieving energy saving and emission reduction, and alleviating the pressure of environmental protection. "Membrane treatment technology will play a decisive role in our county's printing and dyeing industry, and even the county to achieve emission reduction." Relevant industry sources said.