Hospital sewage sterilizer: The focus of hospital sewage treatment is on the disinfection process. After biochemical treatment, most pathogenic bacteria such as Escherichia coli and fecal streptococcus still exist in the sewage, except for some bacteria that precipitate with the sludge. Disinfection treatment is necessary. Chlorine dioxide is the best disinfectant with good bactericidal effect and is an ideal substitute for sodium hypochlorite. This system uses chlorine dioxide method for disinfection, which is safe and reliable to operate, simple and safe to operate, and has superior economic performance. The disinfection pool adopts a laminar flow partition contact reaction device to improve the contact time and achieve good disinfection effect. The operation process can be fully automated, and the dosage can be adjusted. By reasonably controlling the amount of chlorine added, the residual chlorine content in the discharged water can be maintained at around 0.5mg/L, effectively improving the sterilization effect on the drainage network.