Continuous Neutralization Of Acid/Alkaline Industrial Waste

Continuous neutralization of acid or alkaline industrial wastes is preferable to batch neutralization in three situations: when there is a high volume of waste, roughly 190 I/min (50 gpm) or more; when the hold-up time in the reaction tank is less than five minutes; or when there are wide swings in the pH value of the waste (roughly 3 pH units or more). Reliable neutralization under any of these conditions requires a proportional- plus-reset control system, as opposed to simple on-off control.