NOVELTY - A soybean curd residue fuel (38) is a powder-form fuel obtained by mixing dried soybean curd residue and foodstuff waste oil which is waste oil used in processing of foodstuff, and stirring.    USE - Soybean curd residue fuel (claimed).    ADVANTAGE - The soybean curd residue fuel can be economically manufactured by simple process, and efficiently and economically burned using simple apparatus which emits high heat, by environmentally-friendly process. The heat exchange between combustion gas and the ventilated air can be efficiently carried out, and a warm air can be sent out efficiently.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) soybean curd residue fuel manufacturing apparatus, which comprises a hollow-shaped main material added into soybean curd residue which is slag from which soybean milk is squeezed, a stirring blade (13) which is provided in the main material for stirring the soybean curd residue, and a warm air entrance and warm air exit which are formed in the main material. Warm air or exhaust heat obtained from a heating apparatus is supplied to the warm air entrance, dried, and the soybean curd residue is stirred within the main material; and    (2) soybean curd residue combustion heating apparatus (10), which comprises combustion furnace (26) which burns the solid fuel which has soybean curd residue as a main component, combustion chamber (24) which is accommodated in combustion furnace, air blower (42) which sends the air for combustion and the air for heating, air supply main pipe (44) connected to the air blower, air supply pipe (27) which is branched from the air supply main pipe and sends air to the combustion furnace, blast pipe (46) to which the air supply main pipe is connected, heat exchanger (28) which is connected to the blast pipe and fixed above the combustion chamber, heat exchange pipe (52) which is provided in the heat exchanger and connected in the blast pipe, and warm air pipe (54) connected in the heat exchange pipe. The combustion gas in the combustion chamber passes the heat exchanger, and is exhausted. The air sent from the blast pipe is heat-exchanged with the heat of the combustion gas with the heat exchange pipe, and is sent to the warm air pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the soybean curd residue combustion heating apparatus.    Soybean curd residue combustion heating apparatus (10)    Stirring blade (13)    Combustion chamber (24)    Combustion furnace (26)    Supply pipe (27)    Heat exchanger (28)    Soybean curd residue fuel (38)    Air blower (42)    Air supply main pipe (44)    Blast pipe (46)    Heat exchange pipe (52)    Warm air pipe (54)