Study on physical and chemical characteristics of microorganism immobilized media for advanced wastewater treatment

In this study, physical and chemical characteristics of microorganism immobilized media prepared by mixing PVA (Polyvinyl alcohol), PEG (Polyethylene glycol), and activated sludge for advanced treatment of wastewater were investigated. For this purpose, we fabricated media of 20% PVA (v/v) and 15% PEG (v/v) with various blending conditions, analyzed basic physical properties, evaluated organic solvents, and evaluated media diffusion. The specific surface area was 69.86 m(2)/g and the porosity was 48.5%. In addition, as a result of the scanning electron microscope analysis, it was judged that the size of the internal voids of the media was about 30 mu m, so the activated sludge (complex microorganisms) could be dominated. As a result of the solubility evaluation of 10 organic solvents, it was shown that both were insoluble and that it could be stably applied even with wastewater inflow. The diffusion coefficient of the microorganism immobilized media produced in this study was 6.67 x 10(-5) cm(2)/s, which was 3 times higher than that of the existing study. With the microorganism immobilized media enabled, the nitrification and denitrification rates were 99%, and the organic matter (SCODcr) removal rate was about 85%.