Source of papermaking wastewater

The quality of wastewater is related to the quantity of wastewater discharged and the quantity of wastewater produced. The quantity of wastewater produced is affected by the raw materials and the yield of pulping. At the same time, the quantity of wastewater produced is related to the additives added in the process of production. For example, in the process of papermaking, organic chemicals are used as additives or additives, not all of which are kept in the paper web. The part lost to the wastewater has a certain impact on the quality of wastewater, resulting in the increase of COD and other indicators. It can adsorb organic matters The source of halide is mainly chlorine containing bleaching agent, disinfectant and some additives (such as wet strength agent). Therefore, this standard stipulates that the generation of pollutants in pulping and papermaking wastewater shall be determined by material balance according to the type of raw materials, the amount of chemicals added, production process, product category, the degree of wastewater treatment and reuse amount.