| 摘要 |
<p>A method and an apparatus for making organic fertilizer by treating a mixture of livestock excrement such as dung of domestic fowls and cattles with organic substances containing cellulose as grass, straw, rice hulls, or wood chips for composting in a short term, which comprises adjusting the water content of the mixture to 25 to 75 % by weight, cutting and kneading under pressure, rapidly heating to 40 to 90 DEG C by the pressurizing and friction due to kneading, abruptly releasing the applied pressure, and pulverizing in the atmosphere to be brought into contact with oxygen thoroughly and uniformly. Thus the fermentation of the mixture is markedly promoted by bacteria activated by physical and thermal stimulation, whereby the mixture is composted in a short period of time and a fertilizer of uniform and high quality is obtained. The fermentation is accelerated by adjusting the pH of the mixture to 6 to 9 during the fermentation process by addition of a pH modifier thereto. The above organic fertilizer can be efficiently produced by the use of an organic fertilizer manufacturing apparatus composed of a first cylindrical treating tank having a material feed port at its front and a rear interconnected to the front of a second cylindrical treating tank having a discharge port at its rear through a gate, wherein the first is provided with pressure-feeding screw means and cutting/kneading means in the hollow part thereof while the second tank with a revolving crushing cutter. <IMAGE></p> |
