| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for regenerating a sprinkling antifreeze, capable of efficiently regenerating the antifreeze, such as an anti-icer and ice-remover for an airplane, and a deicing agent and snow-melting agent for a runway, which contains propylene glycol as a main component at a low cost, and to provide a method for effectively reusing the same. SOLUTION: This method for regenerating the sprinkling antifreeze has a first process where the sprinkling antifreeze which contains the propylene glycol as the main component is recovered as a waste antifreeze after it is used, a second process where the waste antifreeze is treated with a reverse osmosis membrane so as to be separated into a concentrated waste antifreeze in which the propylene glycol is concentrated and water, and a third process where the concentrated waste antifreeze is used as a regenerated antifreeze as it is, or the propylene glycol and/or an additive for the antifreeze is added to the concentrated waste antifreeze so that its composition is adjusted and then used as the regenerated antifreeze. The method for reusing the sprinkling antifreeze comprises sprinkling the obtained regenerated antifreeze on the airplane or the runway. |
