（1）According to the sewage treatment business, according to the characteristics of municipal sewage and industrial sewage in Guizhou Province, regular sewage water samples and tests are established to study the main pollution components of sewage and the causes of pollutants formation.

（2）Develop sewage technology scheme and gradually establish the process flow of pollutants in sewage to be treated

（3）The corresponding pollutant treatment agents were prepared and moderately activated.

（4）The application of sewage treatment agents in small-scale and pilot-scale studies were carried out to further optimize the product and technical scheme.