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Printing and dyeing emission reduction: early upgrade and early initiative

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2011/09/30 18:18
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Recently, the Shaoxing Municipal Environmental Protection Bureau issued the "Notice on Adjusting the Wastewater Discharge Standards of Industrial Enterprises in the Urban Area", requiring that from July 1 next year, all industrial wastewater included in Shaoxing Water Treatment Development Co., Ltd. in the urban area will be unified Fully implement the third-level standard of the "Integrated Wastewater Discharge Standard", that is, the chemical oxygen demand (COD) nanotube concentration must be controlled below 500 mg per liter.
 
   Although the target of the notice is enterprises in the urban area of ​​Shaoxing, the notice still makes the operators of printing and dyeing enterprises in Shaoxing County nervous. Industry insiders believe that it will be a matter of time before Shaoxing County implements this emission standard, which will make the life of printing and dyeing companies that are already worrying about emissions and standards more difficult.
 
   Since the beginning of this year, Shaoxing County printing and dyeing enterprises have also faced unprecedented pressure to reduce emissions after experiencing labor shortages and power shortages. The city government issued a total of 540,000 tons of sewage per day to Shaoxing County, which also includes the discharge of domestic sewage. At the time when the county's sewage discharge was the largest, it reached 780,000 tons per day. Affected by this, the operating rate of many printing and dyeing enterprises in Shaoxing County is less than 70%.
 
   The boss of a printing and dyeing company in Lizhu Town introduced that due to the total amount of pollution control, the company currently has one-third of the equipment idle and dare not accept business. Regarding the future development, the boss is very contradictory: he holds a glimmer of hope and believes that textile is the pillar industry of our county. Printing and dyeing also plays a role in the textile industry. The government will not turn a blind eye to the difficulties of enterprises. As long as this period of time has passed, the government may shed light on the emissions of printing and dyeing enterprises, so that the current equipment can be used again; and they are afraid that the government will continue to increase the pressure to reduce emissions. If enterprises do not implement technological reforms early, they will Lose the market.
 
   The mentality of the boss of the printing and dyeing company in Lizhu Town is actually a common mentality among the managers of many printing and dyeing companies in Shaoxing County. However, it is clear that the pressure to reduce emissions will only increase. In the past, printing and dyeing companies were allowed to discharge sewage at will, and later they had to be discharged through pipes. Later, the quantity and quality of sewage were required. Especially since last year, Shaoxing County has adopted a series of iron-fisted pollution control measures, such as the implementation of special clean-up actions for construction projects in the printing and dyeing chemical industry, and the “final elimination” system for printing and dyeing enterprises in which sewage exceeds the standard. This year, Shaoxing County again chanted a "tightening curse" for printing and dyeing enterprises' sewage exceeding the standard, and forcing the discharge valves of printing and dyeing enterprises that discharge excessive amounts of sewage to be closed according to law.
 
   In the face of increasingly stringent emission reduction policies and measures, industry insiders pointed out that hesitating is the best way out. An early upgrade is the best way out. Shaoxing County started the agglomeration and upgrading of its printing and dyeing industry since last year. In 5 years, 80% of the printing and dyeing enterprises in the county will be gathered in Binhai Industrial Zone. At present, 41 printing and dyeing enterprises have settled in Binhai Industrial Zone, and 96 enterprises have signed contracts to settle this year. After the 137 printing and dyeing enterprises are assembled, they will account for almost 80% of the county's printing and dyeing production capacity, which will undoubtedly strongly promote the upgrading of the industry. At the same time, Shaoxing County's printing and dyeing industry is also actively eliminating outdated production capacity. Last year, Shaoxing County completed 710 million meters of backward printing and dyeing capacity. This year, our county will also eliminate 500 million meters of backward printing and dyeing capacity.
 
   It is gratifying that, under severe pressure to reduce emissions, some printing and dyeing enterprises in Shaoxing County are actively taking measures to reduce emissions. Five printing and dyeing companies, including Shengxin Printing and Dyeing, Shumeite Printing and Dyeing, and Belle Heng Printing and Dyeing, in Binhai Industrial Zone have introduced new reclaimed water reuse and transformation technology-membrane treatment technology. According to reports, this technology can reduce the COD concentration of printing and dyeing wastewater to less than 50 mg per liter, which can be reused in industrial water for enterprises. Although the membrane treatment technology is about 40% higher than the usual pretreatment cost, the sewage discharge can be reduced by about two-thirds. In addition, Zhiren Printing and Dyeing invested 8 million yuan to introduce reverse osmosis membrane technology produced by Dow Company in the United States to expand and transform the printing and dyeing wastewater treatment system and the advanced treatment of reclaimed water reuse, which also achieved good results.