| 摘要 |
PROBLEM TO BE SOLVED: To efficiently clean a water region to be treated such as a lake, a marsh, a pond, a river, a waterway and a closed live-box as a whole by cleaning the water of the water region and removing precipitates to be accumulated at the bottom of the water region. SOLUTION: A circulating water current going around the water region 11 to be treated is generated. A precipitable flocculant is thrown into the water region 11 so that impurities in the water region are flocculated and formed into flocks 12. The formed flocks are filtered/gathered by a filter 13 erected from the bottom of the water region to the water surface. The gathered flocks are sucked together with water, filtered in a filtration tank 14 and recovered. The filtrate obtained by filtration is returned to the water region. COPYRIGHT: (C)2006,JPO&NCIPI
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