"Paper sludge" 'waste' becomes 'Baby'

Papermaking with sludge, it sounds like a fantasy. However, in the wastewater recycling line of Jinhuasheng Paper, this magic is created every day. A pile of paper sludge, waste slurry recovered from papermaking wastewater, and acquired waste cotton wool were treated to produce a sheet of 3 mm thick swatch at the end of the paper machine. "The 'sludge of paper sludge' has become 'baby', not only reducing pollution, but also bringing about considerable economic benefits," said Li Wei, head of the company's environmental protection department, replacing the purchased wood packaging with sludge recycled paper. The company can save 11.38 million yuan each year.

In the workshop of Jinhuasheng Paper, we saw the whole process of converting sludge into paper. The stinky water is evenly stirred, then mixed with fiber impurities such as cotton wool according to the ratio, and after high temperature, pressing, drying and other steps, the machine spits out a clean sludge paper.

According to reports, the company's wastewater treatment process produces about 45,000 tons of sludge each year, of which the main components are calcium carbonate and fiber, and part of it is waste sludge produced during the biological treatment process.

Li Wei said that in order to be able to "carry out gold in the waste dump," factory technicians through research and development, so that the sludge to become a profitable "Taro." Now, Jin Huasheng and Jin Hongye’s paper slag sludges have all been recycled: oxygen-consuming sludge is used to make low-grade paper, and materialized sludge is used to make high-grade paper. Cardboard produced from mud paper is currently in short supply on the market. The lining of the packaging material.

Li Yu said that in the end, the remaining fine granular sludge, due to the addition of nitrogen and phosphorus elements in the previous biochemical treatment, completely met the standards for organic fertilizers. According to reports, the company's organic fertilizer project has passed laboratory certification. At present, the company has reached an agreement with the park's sewage treatment plant. Both parties will jointly produce organic fertilizers through sludge treatment.

Li Lan introduced that the water used in this series of production processes is the waste water produced by the factory and no waste is produced during the production process, so secondary pollution will not occur.