EXTINCTION AND REMOVAL CHARACTERISTICS Of COLIFORMs AND ESCHERICHIA COLI IN SECONDARY TREATMENT Of JOHKASOU

Abstract

 It is known that coliforms and E. coli are removed in the secondary treatment process of johkasou. Since the internal structure of the secondary treatment process of small johkasou differs greatly, we conducted a detailed analysis of the relationship between the removal characteristics by structure and the biological membrane.The results showed that the coliform group and the coliform count were correlated with the secondary treatment SS.The results suggest that SS removal and inactivation of coliforms and E. coli occur simultaneously in the aerobic part of the secondary treatment. In the case of biological filtration, coliforms and E. coli, which are not correlated with SS, may be generated in the secondary treatment section.Although biological membranes play a major role in the removal of coliforms and E. coli, it was found that it is important to prevent the outflow of biological membranes and SS because coliforms and E. coli are maintained within the biological membrane.