TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Device: In the static aerobic fermentation drying tower, the single-face ventilation unit (16) is in hollow structure and pre-made by coagulation of steel bars; the baffle (18) in one side likes a slid line of a trapezium; air inlet (19) is form at the under part by overlapping two units; the other side is vertical, a enclosed wall is formed by overlapping the two units; two end plates are vertical, hollow separation is form by overlapping the up and the under. Each single-face ventilation unit (16) and two end plates (20) are provided with connection grooves (21), one, two or several groups formed by connection in series of several single-face ventilation units (16) and connection grooves (21) form a close in which is set steel bars to cast coagulating mortar, connecting into a unit to form the single-face ventilation wall (1); the wind passageway (6) of hollow wall id formed by the hollow part of each single-face ventilation unit (16), two or several groups are paralleled to form several independent wind passage (6) of hollow wall in the single-face ventilation wall. The double-face ventilation wall is in trapezium hollow structure and pre-made by steel bars, the baffles (18) in two sides like the two slide hypotenuses, the air inlet (19) is formed at the under part of the two sides by overlapping the two units; the two end plates are vertical, the separation of the hollow wall is formed by overlapping the up and the under. The double-face ventilation unit (17) and two end plates (20) are provided with connection grooves (21), one, two or several groups formed by connection in parallel of several double-face ventilation units (17) and connection grooves (21) form a close in which is set steel bars to cast coagulating mortar, connecting into a unit to form the double-face ventilation wall (2); the wind passageway (6) of hollow wall id formed by the hollow part of each group of the double-face ventilation unit (17), two or several groups are paralleled to form several independent wind passage (6) of hollow wall in the double-face ventilation wall. The several wind passageways of the hollow wall are independent and their bottom are connected with the ventilation vertical pipe (5) by the horizontal pipe (24); the number of the wind passageways (6) and the ventilation vertical pipe (5) is the same, the width is within 30-400mm and the length is within 30-800 mm. The pipe diameters of the ventilation horizontal pipe (4) and the ventilation vertical (5) can be the same or different within 50-250mm; the pipe wall (22) is provided with wall-penetrating holes, thru hole rate is more than 30%. The ventilation horizontal pipe (4) and the ventilation vertical (5) made from engineering plastics or stainless steel can be long pipes or assembling unit; the assembling unit can be connected with same diameter or different diameter and the end with small diameter inserts into the end with large diameter. The ventilation horizontal pipe (4) and the ventilation vertical pipe (5) are not connected and installed separately one middle line; the ventilation horizontal pipe (4) is buried in the material with two ends being connected with the wind passageways (6) in the two sides, the interval between up and down is 0.3-1m, horizontal interval is 0.3-1.5m; the upper end of the ventilation vertical pipe (5) stretches out the material bed and its under part is connected with the wind passageway (6) of the hollow wall in one side by the horizontal pipe (24), the ventilation vertical pipe is not directly connected. The chimney (7) is in fission structure, the under pipe (29) of the chimney and the air door (15) are fixed close to the terrace, the upper air outlet (25) of the chimney is fixed outside the tower, the pipes in the middle are soft pipes which can be overlapped. The fermentation chamber (3) is built at the minimum required height for running the truck. The crusher (27) and the cylinder screen (28) are fixed by using the height of the tower.