METHOD AND DEVICE FOR CLEANING LAKE, MARSH, POND OR THE LIKE

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for cleaning water in lakes and marshes, a pond or the like in which cleaning is efficiently enabled without destructing ecotop of lakes and marshes and the pond or the like containing phytoplanktons such as water bloom. SOLUTION: Water to be treated which is pumped up from lakes and marshes, a pond 1 or the like by a lift pump 2 and contains phytoplanktons is passed through an orifice 4. Cavitation caused thereby is allowed to act on phytyplanktons contained in water to be treated and deactivation of proliferating ablity of phytoplanktons is contrived. Water, to which cavitation actuation has been executed by the orifice 4, is passed through an air mixer 5 for mixing air into water and air is mixed therewith and specific gravity of the mixture is made small. Falling water of a fountain moves on the surface of an impounding reservoir and moves far away and water containing phytoplanktons such as lakes, marshes and the pond is evenly treated.