| 摘要 |
<p>PURPOSE:To accelerate the conversion of night soil into compost, by continuously operating an aerator through a controller with a signal from a detector to raise the temperature of night soil, and switching the aerator into intermittent operation during detecting the initial condition of propagating bacteria. CONSTITUTION:When an aerating cell 1 is filled with the liquid 2 of night soil, a pump 6 is driven by applying an electric current to a motor 7 to spray the liquid 2 through a nozzle in an ejector 5. Air inhaled through an air-introducing pipe 8 by vacuum pressure formed around the column of the sprayed liquid is injected together with the sprayed liquid into the liquid 2 through the ejector 5 to perform aeration. The temperature of the liquid 2 is gradually raised by heat dispatched from the motor 7 and the agitation heat of the liquid 2 derived from the continuous operation of the aerating apparatus, so that the liquid reaches the initial condition of propagation where bacteria begin to increase. Hence, a detector 3 detects it and feeds an electric signal to a controller 4. The motor 7 is intermittently operated by the output of the controller 4 to propagate bacteria while restricting the aerating air.</p> |
