| 摘要 |
<p>PURPOSE:To reduce the amount to be used of the acid and the alkaline agent for neutralization, by passing the specified amount of acid through the ion exchange tower and washing the tower with water, after that, recovering the waste liquid of this acid together with the washing water and then utilizing this waste liquid as a part of the regeneration liquid of the next operation, at the regeneration of the ion exchange resin which has adsorbed Na<+>, Ca<2+>, etc.</p> |
