METHOD FOR PURIFYING RIVER AND ITS APPARATUS

PROBLEM TO BE SOLVED: To purify domestic sewage discharged to rivers by a natural purification action and to conserve landscape by aquatic plants and others by forming a clean-up area by vegetation in which aquatic plants and others are planted in a belt along a flow in a river into which living drainage is discharged. SOLUTION: A river 1, with a partition wall 4 installed along a flow, is divided into a clean-up area by a vegetation bet 5 and a river lower part 6, the part 5, with a nearly L-shaped partition 7 connected with the side wall 1a of the river installed, is divided into a purification basin 8 into which domestic sewage 2 is introduced and a purification water channel 9. When the sewage 2 discharged from a sewage pipe 3 is introduced into the basin 8, part of pollutants are decomposed by the action of microorganisms adherent to the surface of pebbles 10 in the basin 8, and wastewater is introduced into the channel 9 filled with oyster shells 12 to be biodegradated/purified by the microorganisms adherent to the surface of the shells 12. Aquatic plants and others growing in soil 13 in the upper part of the channel 9 also contribute to the purification of wastewater.