(JP10139564-A)       A porous ceramic composite material (I) is formed by mixing 80-40 wt.% clay and quartzite as main component with 20-60 wt. % of an enzyme preparation (II) and water, and calcining the mixture; (I) is of composition (wt.%): 68.0-71.0 SiO2 , 16.0-21.0 Al2 O3 , 0.8-1.2 Fe2 O3 , 1.1-1.7 K2 O, 0.6-1.2 CaO, 1.5-2.6 MgO, 0.6-1.3 Na2 O, 0.3-0.4 TiO3, and 0.005-0.02 enzyme. Also claimed is a method of making a porous ceramic composite material of the composition by adding binder, pore-forming material, (II) and water to clay and quartzite, and calcining the resultant mixture at 900-1350 C.    USE -   (I) is used in treating waste water, particularly water containing animal or vegetable fats and oils; it may be placed in a drain. Used in kitchen and food factory drain (e.g. in grease trap), and with industrial effluent.    ADVANTAGE -   (I) is produced at low temperature and with low cost. It is very effective in removing toxic substances, and pH of the water can readily be adjusted to meet effluent standards. The system is compact, treatment can be performed in a short time, and may be required not more than once a year. There is a reduction in amount of sludge generated. There is no need to backwash (I), and no loss of weight.    (JP2899957-B2)       A porous ceramic composite material (I) is formed by mixing 80-40 wt.% clay and quartzite as main component with 20-60 wt. % of an enzyme preparation (II) and water, and calcining the mixture; (I) is of composition (wt.%): 68.0-71.0 SiO2 , 16.0-21.0 Al2 O3 , 0.8-1.2 Fe2 O3 , 1.1-1.7 K2 O, 0.6-1.2 CaO, 1.5-2.6 MgO, 0.6-1.3 Na2 O, 0.3-0.4 TiO3, and 0.005-0.02 enzyme. Also claimed is a method of making a porous ceramic composite material of the composition by adding binder, pore-forming material, (II) and water to clay and quartzite, and calcining the resultant mixture at 900-1350 C.    USE -   (I) is used in treating waste water, particularly water containing animal or vegetable fats and oils; it may be placed in a drain. Used in kitchen and food factory drain (e.g. in grease trap), and with industrial effluent.    ADVANTAGE -   (I) is produced at low temperature and with low cost. It is very effective in removing toxic substances, and pH of the water can readily be adjusted to meet effluent standards. The system is compact, treatment can be performed in a short time, and may be required not more than once a year. There is a reduction in amount of sludge generated. There is no need to backwash (I), and no loss of weight.    (EP839778-B1)       A porous ceramic composite material (I) is formed by mixing 80-40 wt.% clay and quartzite as main component with 20-60 wt. % of an enzyme preparation (II) and water, and calcining the mixture; (I) is of composition (wt.%): 68.0-71.0 SiO2 , 16.0-21.0 Al2 O3 , 0.8-1.2 Fe2 O3 , 1.1-1.7 K2 O, 0.6-1.2 CaO, 1.5-2.6 MgO, 0.6-1.3 Na2 O, 0.3-0.4 TiO3, and 0.005-0.02 enzyme. Also claimed is a method of making a porous ceramic composite material of the composition by adding binder, pore-forming material, (II) and water to clay and quartzite, and calcining the resultant mixture at 900-1350 C.    USE -   (I) is used in treating waste water, particularly water containing animal or vegetable fats and oils; it may be placed in a drain. Used in kitchen and food factory drain (e.g. in grease trap), and with industrial effluent.    ADVANTAGE -   (I) is produced at low temperature and with low cost. It is very effective in removing toxic substances, and pH of the water can readily be adjusted to meet effluent standards. The system is compact, treatment can be performed in a short time, and may be required not more than once a year. There is a reduction in amount of sludge generated. There is no need to backwash (I), and no loss of weight.