| 摘要 |
PROBLEM TO BE SOLVED: To remove phosphorus as the cause of generation of hardly decomposable matters, noxious matters and the like not to be removed only by microbes by containing ceramic or a hardly soluble inorganic metallic salt in an acetalized polyvinyl alcohol and forming communication holes all through from the surface to a central section of a carrier. SOLUTION: Ceramic oxide such as aluminum oxide, beryllium oxide, silicon oxide or magnesium oxide, or non-oxidizing ceramic such as silicon carbide, titanium carbide, zirconium carbide, boron carbide or tungsten carbide is contained in an acetalized polyvinyl alcohol carrier, or hardly soluble inorganic metallic salt such as silver chloride, silver bromide, zinc thiocyanate, silver sulfate, silver carbonate or calcium carbonate is contained in the acetalized polyvinyl alcohol carrier, and communication holes are formed all through from a surface to a central section of the carrier. Not only the ordinary waste water treatment such as the removal of nitrogen by nitrification and denitrification but also the removal of phosphorus as the cause of the generation of hardly decomposable matters, odor and the like not to be removed by microbes can be performed only by using this carrier. |
