NOVELTY - A molten substance formed after heat-melting ash (1), is injected into water and metal component containing poisonous metal is settled in water, then slag component (4a) and metal component are isolated using bubble slag (4b). Slag (4b) is ground to obtain powder-form inorganic material (14). The material is molded to a defined shape, heat-cured and solidified to form an inorganic substance porous compact.    USE - For manufacture of inorganic substance porous compact (claimed) from incineration ashes or coal ash generated from general waste incineration field, coal-fired power plant for a microorganism carrier for denitrification process, fermentation, water treatment, gas treatment; an adsorbent carrier for deodorization, sterilization, removal of toxic substance and sewage treatment, fermentation, soil recovery; a photocatalyst carrier; yeast carrier for ethanol manufacture.    ADVANTAGE - The inorganic substance porous compact is manufactured using incinerations ashes an/or coal ash as raw material. The microorganism carrier formed using the compact supports the nutrient for algae culture and denitrifies bacterium effectively from the sewage, gasoline, petroleum. The ashes and the sewage sludge are recycled, and the compact is suitable as an adsorbent for deodorization, sterilization, removal of toxic substance and sewage treatment, fermentation, soil recovery.    DETAILED DESCRIPTION - Manufacture of inorganic substance porous compact, comprises heat-melting (3) of incineration ashes and/or a coal ash, to decompose toxic organic substance in inert-gas atmosphere and the toxic organic substance is removed. The molten substance is injected into water and metal component containing a poisonous metal is settled in water, and then a slag component and a metal component, are isolated (10) by floating slag component on the water surface using a bubble slag. The bubble slag is ground (13) to obtain powder-form inorganic material. The powder-form inorganic material is molded to a defined shape, heat-cured (17) and solidified to form an inorganic substance porous compact.    DESCRIPTION OF DRAWING(S) - The figure shows the flowchart of manufacture of the inorganic substance porous compact. (Drawing includes non-English language text).    Incineration ashes (1)    Melting process (3)    Slag (4a)    Bubble slag (4b)    Isolation process (10)    Grinding process (13)    Powder-form inorganic material (14)    Curing process (17)