| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus for treating sludge, from which inorganic sludge containing many inorganic components can be withdrawn by a simple constitution and to provide a method for treating sludge. <P>SOLUTION: An inorganic sludge line 45 is connected to the bottom of a solubilization tank 14 for solubilizing the separated sludge obtained by separating the organic waste water treated biologically in a biological treatment tank 12 in a sedimentation basin 13 by solid-liquid separation. A circulation pipeline is arranged for withdrawing the liquid in the solubilization tank 14 from the lower part and returning the withdrawn liquid to the upper part of the solubilization tank 14. The liquid in the solubilization tank in the vicinity of the open end of the circulation pipeline is fluidized by a circulating means 38 consisting of a circulation pump arranged in the middle of the circulation pipeline to form a fluidized bed 51. A retainment layer 53 is formed above the fluidized bed 51. As a result, inorganic components are accumulated in the solubilization tank 14 and inorganic sludge containing many inorganic components is withdrawn from the inorganic sludge line 45. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
