Abstract: The present invention proposes light-weight and easy-to-handled deodorizing material that has a large contact area with bad smell-causing gas as well as better deodorizing performance and also that enjoys a smooth circulation of that gas with a lower permeation resistance. A single-faced corrugated fiberboard made of a cellulose-based substance is allowed to contain ferrous sulfate, which is subsequently oxidized into basic ferric sulfate.

Abstract: The present invention proposes a water-proof deodorizing, bedsore-preventing sheet that can not only eliminate the bad smell from the wastes of bedridden sick persons but also prevent the bedsore or its worsening and a method for manufacturing the same. The present invention gives such a manufacturing method that the sheet-shaped deodorizing material D obtained by allowing a sheet-shaped member made of a cellulose-based substance to contain ferrous sulfate which is subsequently oxidized into basic ferric sulfate is coated with the permeable film 1, whose fringes are partially sealed subsequently.

Abstract: A deodorizing material used for deodorization with respect to human and animal excreta by mixing at least one iron(II) or iron(III) compound selected from the group comprising ferrous sulfate, ferric sulfate, ferrous chloride, ferric chloride, ferrous nitrate, and ferric nitrate, in a cellulosic material and a cellulosic formed material.

Abstract: A method of treating sewage sludge is disclosed. The method makes use of an unitary multi-hearth furnace and the sewage sludge is dried in an upper part of the furnace and subjected to pyrolyzation in a lower part thereof to cause the sewage sludge to be reduced to ashes whereby a relatively small amount of exhaust gas is produced. The exhaust gas is also utilized as a heat supply source.