The recycling apparatus of waste sulfuric acid for collecting waste
sulfuric acid generated at a source site A, transporting it by a carrier
B, and recycling it for reuse at a user site C, the recycling apparatus
of waste sulfuric acid including a receiving tank for receiving virgin
sulfuric acid (a) and waste sulfuric acid (b) having a concentration
different from that of the virgin sulfuric acid, and including (1) a
mixer alone, (2) a mixer and a concentration monitor, or a mixer and a
cooler in combination, or (3) a mixer, a concentration monitor, and a
cooler in combination.