| 摘要 |
<p>PURPOSE:To carry out efficient anaerobic digestion with a small setting area by providing two partition plates at the upper part of a digestion vessel to separate the vessel into a liquid mixture part consisting of an ascending part and a descending part, and providing a rectifying plate extending from the lower part of the solid-liquid separation part to the liquid mixture part. CONSTITUTION:A digestion vessel 1 having an untreated liquid inflow part 2 at the bottom, a partition plate 3 extending from above the liquid surface of the vessel 1 into the liquid and separating the upper part of the vessel 1 into a solid-liquid separation part 5 and a hermetic liquid mixture part 4, a treated liquid pipe 14 communicating with the upper part of the solid- liquid separation part, and a gas discharge pipe 15 communicating with the upper part of the liquid mixture part are provided. And a partition plate 6 whose upper end is situated under the liquid surface of the liquid mixture part, whose lower part is inclined downward while keeping an interval from the leading end of the partition plate 3 and extends to the lower part of the solid-liquid separation part, and which separates the liquid mixture part into an ascending part 7 and a descending part 8, and a rectifying plate 10 are provided. Namely, the flow of generated gas into the solid-liquid separation part is prevented, and the sludge settled at the solid-liquid separation part is returned to the digestion part by utilizing a spiral flow of the generated gas. Accordingly, the anaerobic digestion is efficiently carried out with a small setting area.</p> |
