Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Year | Description |
| 1999 | Invention patented by Jae-Do Shim and Yoshiichi Okada on April 14th, 1999. Abstract: Disclosed is an aeration apparatus for the efficient purification of livestock excretory liquid at low cost and in a way that prevents environmental pollution. The organic waste fluid aeration tank consists of an outer tank (1) and an aeration tube (2) installed within the outer tank. This aeration tube (2) has suction holes (3) set in the lower tube wall and scatter holes (4) set in the upper tube wall. An air diffusion head (6) coupled to a blast pipe (5) is built into the base of the tube. The liquid being treated is decomposed biologically within the outer tank (1), and is aerated within the aeration tube (2). It is expelled into a sludge sedimentation tank. A portion of the attached organic substances and generated bubbles is scattered back into the outer tank (1) through the scatter holes (4). In this invention, multiple units of the above-mentioned tanks are employed in series. Purified water is obtained through the purification of supernatant liquid delivered to the sludge sedimentation tank from the first aeration tank by aeration in the remaining tank. The purified water may be used as wash water for pig houses and liquefied fertilizer. |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
