PROBLEM TO BE SOLVED: To provide a blue-green algae collection device which: can efficiently collect blue-green algae while separating a precipitable foreign matter such as sand and a buoyant foreign matter such as foliage and is compact in size, light in weight and simple in structure.SOLUTION: Floating means floats a collection container 1 on a water surface. A front section inlet 11a and a rear section outlet 12a which open down to predetermined water depths are respectively provided on a front side wall 11 and a rear side wall 12. A shower device 3 which sprays water toward the water surface is arranged close to an inner side of the front section inlet 11a. A suction port 4 with an opening at a position higher than a bottom wall 15 is arranged posterior to the shower device. The suction port is connected to a blue-green algae extraction port 5 communicated with a suction opening of a pump. Because foliage or the like having small specific gravity immediately floats and flows out through the rear section outlet 12a and sand or the like having large specific gravity steeply sinks, the water with blue-green algae flocculated therein can be exclusively sucked through the suction port 4.COPYRIGHT: (C)2015,JPO&INPIT【課題】 砂等の沈殿性の異物や木葉等の浮遊性の異物を分離しつつアオコを効率的に収集できる小型、軽量かつ構造が簡単なアオコ収集装置を提供する。【解決手段】 浮遊手段によって収集容器1を水面上に浮遊させ、前側壁11と後側壁12とに、それぞれ所定の水面下の深さにわたって開口する前部流入口11aと後部流出口12aとを設ける。前部流入口11aの内側近傍に水面に向かって水を噴射するシャワー装置3を設け、このシャワー装置の後方に底壁15より高い位置に開口する吸入口4を設け、この吸入口をポンプの吸い込み口に連通するアオコ取出し口5に連通させる。比重の軽い木葉等は、直ぐに浮上して後部流出口12aから流出し、比重の重い砂等は急勾配で沈むため、アオコが凝集する水だけを専ら吸入口4に吸い込むことができる。【選択図】図4
