Resource Utilization of Papermaking Solid Waste

　　Papermaking waste not only contains visible wastes such as iron, rocks, plastics, ropes, but also printing ink, fine fibers, clay, paint, sand, pigments and other fine impurities. This article puts forward relevant suggestions and measures.

　　my country has stepped up its control over the papermaking industry, and how to improve the treatment level of papermaking solid waste has become a key research and practice topic for papermaking enterprises. For example, most of the components in deinking sludge can be degraded naturally, but it contains some heavy metal components. The accumulation of these components will cause long-term damage and impact on the environment. There is also the sludge produced by advanced treatment of papermaking wastewater, namely tertiary sludge, which is mainly impurities produced by chemical flocculation and contains a large number of components that are difficult to biodegrade. Although the treatment is difficult, the recycling value is high.

　　Plastic waste to produce plastic particles

　　The plastic content in the waste residue is high and the degradation is poor. At present, the process of producing plastic particles from papermaking waste residue is relatively mature and has entered the stage of popularization and application. Recycled plastic particles can be used as raw materials for plastic products factories, but some recycled plastic particles of poor quality cannot be used in the manufacture of plastic products. However, as an organic product, plastic can be refined with this poor-quality plastic. The technology of plastic refining is relatively complete. However, if there are too many impurities in paper-making plastics, it will affect the quality of oil and the rate of oil yield.

　　Application of alkali recovery white mud

　　Through the treatment and purification of alkali-recovered white mud, calcium carbonate filler can be produced, reducing its damage and impact on the environment, and creating partial profits, saving paper-making solid waste treatment costs. After purification and deep processing, the calcium carbonate in the alkali-recovered white mud can also be used as a raw material for cement production, and can also be used to produce wall coatings and waterproof coatings.

　　Utilization of deinked sludge

　　The main components of deinking sludge are kaolin, calcium carbonate, fiber, and ink. If the organic matter in it can be completely burned, and the inorganic matter can be recycled for the production of paper fillers and coating materials, it is an ideal use of deinking sludge. way. In addition, after deinking sludge undergoes surface modification, drying, crushing and homogenization, it becomes a gray powdery composite filler, which can replace the higher-cost wood powder. Add coupling agents, modifiers and other additives, and use simple melt blending technology to produce various thermal polymer materials. The filler made of waste sludge can be used in plastic guardrails, road asphalt modified fibers, waterproof materials, building templates, agricultural greenhouse supports and other products.

　　Used for waste and soil improvement

　　Paper sludge can be oxidized and decomposed into humus easily absorbed by plants after microbial fermentation. Therefore, paper-making solid waste is also used in sludge composting. This application also realizes the recycling of paper-making solid waste, but the treatment efficiency is low. Since the paper-making solid waste contains a large amount of nitrogen, phosphorus, potassium and other elements, it can also be directly used for soil improvement. Practice has proved that the soil bulk density of plots using sludge is reduced and the pH is more stable, which can effectively improve the quality of cultivated land.

　　Conclusion

　　The existing paper-making solid waste disposal is mainly based on "disposal to landfill". On the surface, it is actually "covering the ears and stealing the bells" and "enduring troubles". The side effects of "processing" are huge, and it is a great waste of it. The intrinsic value of itself. We should transform from "disposal" to "production", treat paper-making solid waste as a "resource" and implement "solid waste refining" to turn waste into treasure.