| 摘要 |
<p>PROBLEM TO BE SOLVED: To decrease the quantity of carbon dioxide in water and to prevent the generation of green alga by a method in which raw water is acidified, aerated with nitrogen, neutralized. and aerated with oxygen. SOLUTION: Raw water 2 is sent to an electrolytic water generator 6 through a filter 4 by a pump 5 and is separated into acidic water 13 and alkaline water 15. The acidic water 13 is sent to the first tank 10, and the alkaline water 15 is sent to the second tank 11. The acidic water 13 of the first tank 10 is aerated with nitrogen supplied from a gas separator 18 to discharge carbon dioxide and oxygen, sent to the second tank 11 to be mixed with the alkaline water to be neutralized, and sent to the third tank 12. Here, oxygen is supplied from the gas separator 18 for aeration to enrich oxygen. Water, after being stored to a regular amount of storage, is discharged from a discharge opening 17. In this way, the concentration of carbon dioxide is decreased, and the generation of water bloom can be controlled.</p> |
