Biological purification engineering refers to the pollution of particles and microorganisms that need to be controlled. The room needs to be cleaned regularly, and the interior decoration materials and equipment should be able to withstand corrosion. The room (area) where the biological purification project needs to control dust particles and microbial pollution in the environment, and its building structure, equipment and use have the function of preventing the introduction, generation and retention of pollutants in the area. The dust production of the clean room production equipment and product production process of the biological purification project mainly depends on the characteristics of the product production process, the condition of the equipment selected and the technical measures adopted, the raw materials and the purity of the process medium.