[Research of disinfecting effect of SH-series (the equipment for secondary treatment of hospital sewage)].

In order to examine the effect of using SH-series (i.e. The equipment for secondary treatment of hospital sewage) in treating sewage, we have been engaged in a series of testing-study. The results were as follows: The pollution of organic matter and microbes in hospital sewage was very serious. Both kinds of pollution were considered, when we plan our scheme of conducting hospital sewage treatment. The temperature of water was raised to 23.7-24.2 degrees C and the value of pH 7.4-7.8, the hospital sewage was treated for 60 minutes through the SH-series equipment with increased oxygenation and digestion the coliform group increased rapidly in geometrical progression. The reducing rate of the major organic matter pollution index was 69-89%. After having gone further through the SH-series treatment (Disinfecting and oblique-tubes sedimentation) sewage containing intestinal pathogens and tubercle bacilli reach the index comparable with GBJ48-83 (trial edition) "The standard". "The Disinfecting contacting time" was 1/4.5-1/2.2 of "The Standard", its "Residual chlorine" was 105-110% of "The standard".