PROBLEM TO BE SOLVED: To provide a filter material which is excellent in performance and suitable for purifying sewage and cleaning air.SOLUTION: Powdery and granular andosol, smashed pieces of pumice and ordinary portland cement are mixed together in a mixer, and water is added to this mixture, and mixing and kneading are made to form a kneaded raw material. Then, the kneaded raw material is put into a molding machine hopper, and pressed and vibrated sequentially in a molding machine process, and the kneaded raw material is press-hardened to form a molded raw material. Then, curing is made to the molded raw material by means of through-flow drying, and then water spray curing is made to the raw material concerned to form a solid raw material, that is, the filter material for purification. The filter material is suitable for purifying sewage and cleaning air.【課題】性能の良い汚水浄化用、空気清浄用に適する濾過材を提供する。【解決手段】粉粒状の黒ボク土と、砕細片状の軽石と、普通ポルトランドセメントをミキサーにて混合し、水を加えて混合練りを行って練り素材を形成し、該練り素材を成形機ホッパーへ投入して、順次、成型機工程で加圧・振動して練り素材を締固めるようにして成形素材に成形し、その後、成形素材に、通風乾燥養生を行い、爾後、散水養生を行って固化状素材に形成したことを特徴とする浄化濾材及びその製造方法に関するもので、汚水浄化用、空気清浄用に適する濾過材を提供できるものである。【選択図】図１
