| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus which changes the water quality of a closed water area from an anaerobic environment, which is the cause of the eutrophication, to an aerobic environment and which removes phosphoric acid and nitrogen in the closed area.SOLUTION: A water purification apparatus which floats on the water in a closed water area includes: a solar battery; a control device; a pump; a methanol container; a metering pump; and a net-like holding body. A water intake suction hose is attached to the water suction side of the pump and droops in the water, and a hole is bored in the peripheral wall of the suction hose just near the pump. A discharge pipe is attached to the discharge side of the pump and droops in the water, and a jet nozzle is disposed on the end of the discharge pipe. When the pump starts, a negative pressure is generated on the side of the water intake suction hose so that cavitation occurs, and fine bubbles generated by the cavitation are jetted into the water from the jet nozzle to provide aeration. A net-like holding body, in which crushed oyster shells are held, is installed in the water so as to hang and is attached to the methanol container. A metering pump which can adjust a flow rate is disposed on a pipe which is provided on a floating body and the end of which is formed into an opening.SELECTED DRAWING: Figure 1 |
