How was tithing done in the Old and New Testaments? Were tithes given to priests collectively or individually?

How was tithing done in the Old and New Testaments? In the New Testament, it seems it was put in the γαζοφυλάκιον or "treasury" (cf. Mk. 12:41,43 & Lk. 21:1 , the parable of the widow's offering). But in either Testaments, were tithes ever give directly to individual priests, or were they only given to the priests collectively? If an individual priest received a tithe, was he obliged to put it in the "treasury", or did priests have individual "accounts"?