With the development of industrialization, more and more wastewater is produced by various industrial enterprises. Once the wastewater is directly discharged, it will cause great damage to the existing water resources, so sewage treatment is a very important link in environmental protection. Polyacrylamide is the most widely used flocculant in wastewater treatment, but before wastewater treatment, we should first understand the classification of industrial wastewater.

Industrial wastewater includes production wastewater and production wastewater. The wastewater and waste liquid produced in the process of industrial production are generally called industrial wastewater. The classification of industrial wastewater includes the following categories:

1. According to the products processed by the industry, they can be divided into: Metallurgical Wastewater, textile wastewater, papermaking wastewater, tannery wastewater, pesticide wastewater, refinery wastewater, mineral processing industry, dyeing industry and sugar industry wastewater, etc.

2. According to the chemical properties of the main pollutants in the wastewater, it can be divided into: wastewater containing radioactive substances, cooling water only polluted by heat, organic wastewater containing mainly organic pollutants, organic wastewater containing mainly organic pollutants, mixed wastewater containing both organic and inorganic substances and heavy metal wastewater.

3. According to the main components of pollutants in the wastewater, it can be divided into: phenol containing wastewater, organic phosphorus containing wastewater, radioactive wastewater, chromium containing wastewater, acidic wastewater, alkaline wastewater, etc.

In fact, a kind of industry can discharge several kinds of wastewater, and a kind of wastewater will have different pollutants and different pollution effects. For example, dye factories discharge both acidic wastewater and alkaline wastewater. Textile printing and dyeing wastewater, due to different fabrics and dyes, the pollutants and pollution effects will be very different. Even the wastewater discharged from a production unit may contain several pollutants at the same time. For example, there are phenols, Oils and sulfides in the steam condensate of distillation, cracking, coking and stacking units. In different industrial enterprises, although the products, raw materials and processing processes are quite different, similar wastewater may be discharged. For example, in oil refineries, chemical plants and coking gas plants, oily and phenolic wastewater may be discharged.

The diversity of industrial production makes the nature of drainage pollution complicated, such as organic pollution, inorganic pollution, heat pollution, color pollution and so on. Therefore, the treatment of industrial wastewater can not apply other people's process and equipment from a few simple standards of COD, BOD, SS and pH. In addition to the above indicators, there are many factors affecting the treatment, such as temperature, ammonia nitrogen content, pH, salt content, toxic substance (organic phosphorus) content, surfactant (foaming substance) and dye content.

For different types of industrial wastewater with different characteristics, in order to maximize the effectiveness of polyacrylamide, Lvyuan Environment Group Co.,Limited still suggests that we get the most accurate model and dosage of polyacrylamide through water sample experiment.