There will be a lot of waste water and sewage in the papermaking industry. The organic matter in the waste water accounts for 25% of the total organic matter in the domestic industrial waste water, which has a very serious impact on the natural ecological environment. Therefore, it is necessary to reduce the waste water discharged from the papermaking industry, so as to achieve zero discharge of the paper waste water. In order to ensure the production and emission reduction of papermaking industry, it is also necessary to promote the zero discharge of papermaking wastewater, which can not only improve the economic benefits of papermaking industry, but also achieve the goal of energy conservation and emission reduction, and form better social and environmental benefits, which is also in line with the concept of sustainable development put forward by today's society.

There will be a lot of waste water from pulp and paper making. There is a high BOD in the waste water from paper making, and there are a lot of fiber suspensions in the waste water from paper making. In addition, the waste water from paper making contains divalent sulfur and coloration, which will have a very serious pollution and impact on the natural ecological environment. The wastewater also contains black liquor and white water, so it is necessary to effectively clean up the impurity content in the wastewater and reduce the impurity content in the wastewater, which not only meets the environmental protection requirements, but also improves the social and economic benefits.