WATER QUALITY IMPROVING DEVICE AND WATER QUALITY IMPROVING METHOD BY GRID DRAIN

摘要

PURPOSE:To clean the inside of a bottom mud layer by providing a grid drain and a water collecting pipe connecting the grid drain and providing a shallow well connected to the water collecting pipe. CONSTITUTION:After the water of a pond is pumped out, the shallow well 6 is driven perpendicularly into the bottom mud 7 and the water collecting pipe 5 is joined horizontally to the shallow well 6. The grid drain 4 is horizontally and perpendicularly joined to the water collecting pipe 5. The water filtered through the filter cloth of the grid drain 4 is recovered through the water collecting pipe 5 into the shallow well 6. The recovered water is pressurized by a submersible pump 8 and is then sprinkled into the air from fountain holes 10 above the lake via a pipe 9. The water sprinkled in the air falls by contg. the oxygen in the air. The concn. of the dissolved oxygen in the water is thereby increased. The bottom mud in the anaerobic state is converted to an aerobic state in this way and the bottom mud is decreased.