Papermaking wastewater can actually raise squid

Thousands of ornamental koi fish splashed in the ecological landscape pool to compete for bait. If it is not the owner’s introduction, perhaps no one believes that the water cultured by these koi fishes is actually the wastewater discharged from papermaking. This is the highlight of the "Paper-making Wastewater Raising Catfish" in Jindong Paper Co., Ltd. of Zhenjiang City, Jiangsu Province.

In China, papermaking companies are undoubtedly a heavily polluting industry. In the face of paper “big tyrannium”, the reporter has an accurate monitoring data in his hands, but it shows the company's brilliant environmental charisma. From January 2002 to May 2003, the average concentration of COD in Jindong's discharge of papermaking wastewater was only 10.8% of the country's latest first-level emission standard. The average concentration of BOD emission was only 7% of the latest national standard, and the amount of suspended solids was discharged. The average rate of the rate is also 11.7% of the latest national standard. The boilers used by Jindong Company are equipped with advanced smoke and dust removal systems, which not only make the smoke blackness nearly reach zero, but also the average concentration of sulfur dioxide emitted is 76% lower than the latest national standard. A series of data indicates that Jindong's environmental performance is superior to others. Similarly, in terms of water consumption per ton of paper, Gold East has also far behind its domestic counterparts. In 2002, the company produced more than 1.1 million tons of high-grade paper. The average amount of water per ton of paper was only 12 tons, which is 21% of the national standard and only 8.7% of domestic counterparts. In the first five months of this year, the company reduced the water consumption per ton of paper to 8 tons. At the same time, the company’s average COD and suspended matter emissions per ton of paper were 1.8% and 1.2% of the domestic same industry respectively. The modern level of environmental protection "giant".

Gold Dong Paper Company, which is known by the industry insiders as “paper giant”, does have many excitement. When foreign investors took a look at this "feng shui treasure place" of the Dajiang River in Zhenjiang City, they invested 15.14 billion yuan to root the paper giant "Macao" on 5 square kilometers of land. According to the owner's introduction, Jindong Paper's two paper machines produced high-grade paper with a width of more than 9 meters, which is the highest in the world. In 2002, the company produced more than 1.1 million tons of high-grade paper, with an industrial output value of more than 6 billion yuan, ranking first in the country. 80% of them are coated papers, and the output is the largest in the world. Since the beginning of this year, the output of papermaking has exceeded 100,000 tons every month, and it has occupied more than 20 provinces and cities in the country.

Jindong Paper's paper production is astounding, and pollution prevention work is also impressive. In the beginning of the papermaking project, Jindong invested more than 700 million yuan in pollution control. Using the most advanced technology and equipment in the world, a sewage treatment facility with a daily processing capacity of 50,000 tons was built. In order to ensure the good operation of the wastewater treatment system, Jindong Company has equipped with advanced detection equipment such as on-line DO meter, online pH meter, on-line COD monitor, etc. in all aspects of wastewater treatment, and uses DCS for monitoring throughout the entire process. In order to achieve the purpose of biological monitoring, Jindong Company deliberately built an ecological landscape park when it built a papermaking wastewater treatment system. It purchased thousands of ornamental koi fishes and put them on the papermaking wastewater discharge port to become the waste water discharged by Jindong Paper. Hard and vivid. At the same time, Jindong Company will also equip advanced white water recovery and filtration systems on two paper machines for the recovery of fine fibers and chemical raw materials, and will basically achieve closed-loop white water recycling. Although paper giants face the ever-changing Yangtze River, Jindong Company has meticulously weaved a tight network of reused water in the factory area, providing continuous supply of papermaking wastewater to greening, landscaping, landscapes, and public toilets. .