Children's playground and sand solip yard burst on how useful microbes

摘要

As a result of the recent hygiene and safety checks of children's playgrounds nationwide, dog roundworm eggs and heavy metals are detected in most of the playgrounds. Pollution has been found to be serious. The present invention excludes physically antibacterial treatment of playground sand where infants and children who do not have immunity physically have antibacterial treatments. It is characterized by using. ; Useful microorganisms, playground sand, natural pine needles