Recovery Cycle--Regeneration of Waste Paper

Editor's Note : Waste paper began as a renewable resource for the paper industry at the beginning of the 20th century. It is also called "secondary fiber," and the amount of waste paper used in papermaking raw materials has increased year by year. Today, due to people's demands for improving the environment, protecting forests, saving energy and raw materials, and increasing the demand for papermaking costs, together with increasingly stringent environmental protection requirements, rising prices of paper-making materials and energy pressure, waste paper as a renewable resource, It has attracted the attention of governments and companies around the world. Compared with the pulping of directly using plant fiber raw materials, waste paper pulping can save a lot of energy, save plant fiber raw materials, reduce product costs, and save equipment investment and reduce environmental damage. The use of waste paper to make paper can save 50% of water, reduce the corresponding discharge of sewage, save energy by 60-70%, save 2/3 of construction investment, save the amount of chemical raw materials such as sodium hydroxide, reduce environmental pollution, and reduce air pollution by 66%. -70%; reduction of 40% in biological oxygen demand; 25% reduction in suspended solids in sewage; 70% reduction in solid waste. From this we can see that the recycling of waste paper has significant social and economic benefits.

When it comes to "circular economy", it is impossible to say no papermaking. Papermaking consumes forest trees and discharges sewage. If the scale cannot be well controlled and pollution is contaminated, it is difficult for the forests to maintain their natural replacement, and water resources cannot self-purify. Then, for the future, the paper industry is a sword of Damocles. . The use of waste paper as a raw material for the production of new paper can greatly reduce the consumption of wood pulp and the discharge of pollutants. It can also save 400 kg of coal, 400 kWh of electricity and 300 tons of water per metric ton of paper. Therefore, from today's packaging field can only focus on the sustainable development of the recycling economy in order to build a strong packaging country ....

Therefore, it is necessary to talk about the recycling and utilization of waste paper in this issue.

Recycling processing>>>>

The fastest growing paper packaging materials in packaging materials have become the focus of development and utilization because of their obvious ecological benefits and economic benefits. At present, for paper-based packaging waste, recycling papermaking and new product development are usually used for recycling.

>>>> Additives Application The most important deinking chemicals in waste paper are deinking agents. Deinking agent is mainly a series of surfactant formulations, anionic, cationic, amphoteric and non-ionic, the choice of surfactant depends on the paper printing conditions and deinking process.
The application of waste paper deinking chemicals
Development and Application of XYT-1 High Efficiency Waste Paper Deinking Agent
Waste Paper Adhesive Sources and Classification and Reuse Methods (1) (2)

>>>>Technology Application The waste paper can be used for batters, linings, core pastes, corrugated base papers and high-strength corrugated base papers, household papers, newsprint papers, and various cultural papers (especially medium and low-grade cultural papers) of various paperboards. The use of waste paper for deinking in China started late, but it has developed rapidly in recent years. The waste paper processing technology, high-concentration crushing, desorption, washing, pulp screening, flotation, heat dispersion and bleaching technologies and equipment are becoming more and more sophisticated and more and more advanced. The processing capacity of domestic waste paper production lines ranges from 30t/d to the current 100-150t/d, and there are a number of 300t/d and 500t/d production lines put into operation. How to rationally and scientifically select waste paper deinking process and equipment is the key to the application of waste paper deinking pulp and creating good economic benefits.
Discussion on waste paper recycling process problems and solutions Waste paper deinking technology application Discussion on waste paper deinking technology Application of resin adsorption of metal ions in papermaking wastewater thermodynamics (1) (2) (3)
Wastewater Recycling Papermaking Wastewater Treatment Technology Study (1) (2) (3)
Study on the treatment of waste papermaking wastewater by pre-oxidation and coagulation (1) (2)
Research on Comprehensive Treatment Technology of Papermaking Black Liquor (1) (2) (3)
Explore 100% recycled newsprint innovation deinking production paper (1) (2)

Recycling>>>>

Waste paper has a wide range of applications for recycling. The raw materials for paper are mainly plant fibers such as wood, grass, reeds, and bamboo. Waste paper is also called “secondary fiber,” and the main purpose is to reuse recycled paper products for fiber recycling. According to the different fiber composition, the corresponding recycling according to paper species can maximize the value of waste paper resources.

In addition to the production of recycled paper, waste paper of low quality or mixed with other materials has a wide range of other recyclable uses: The production of furniture, the use of old newspapers, old books and other waste paper rolled round slender sticks, wrapped in a layer of plastic paper Make practical and beautiful furniture. Daily necessities or special products for processing: waste papers that are difficult to handle can be formed by crushing, grinding, adding binders and various fillers, and producing soap boxes, shoe boxes, sound-insulating cardboard, and device paper. It is also used for the production of civil engineering materials, gardening and agriculture. Recycling of composite paper packaging for the production of recycled materials for animal husbandry production, use as fuel, extraction of waste paper reconstituted enzymes, production of glucose, and utilization in the chemical industry. Utilization and disposal of waste paper in China Waste paper is used to make packaging paper for raw materials. Three methods of separation of plastics Recyclable cardboard innovation and improvement of recyclable paperboard product performance Improvement of recycled paper definition and comparison with plain paper Sorting and recycling of packaging waste--Recycling waste paper packaging material to make foam Experimental Research on Packaging Buffer Materials (1) (2)
Research on the Preparation of Adhesives by Recovering Lignin from Papermaking Black Liquor (1) (2) (3)

Legal and Standard Constraints >>>>

Papermaking is concentrated in countries with developed industries and rich timber resources. Due to the decreasing number of forest resources in the world, all countries in the world now attach great importance to the recycling of waste paper. The output of Japanese paper and board increased year by year. In 2001, it was 30.717 million tons, which was 1.1 times that of 1990. In the 11 years between 1990 and 2001, the Japanese pulp consumption remained basically unchanged, and the waste paper was Japanese paper industry. The main raw material. In 2001, waste paper accounted for 58% of Japan's raw materials for paper and board production. After several decades of efforts, China’s waste paper recycling has achieved great development, but there is still a big gap compared with Japan. The reason for this is that there are both institutional and cognitive issues. At present, it is imperative to formulate a set of laws and regulations for recycling of waste paper that conforms to China's national conditions and is in line with international standards. This will enable China's paper industry to develop at a high speed and effectively protect resources and the ecological environment.
The two waste paper labels in the United States have suspended the use of waste paper recycling legal systems. China will legislate to improve the waste paper recycling system and perfect the waste paper recycling circular economy legislation.