Process and apparatus for purifying waters of oxidisable carbon compounds contained therein

摘要

The apparatus has two purification stages (I, II) connected in series each having a circulation (2, 22) having a throughflow photoreactor (1, 21). Each throughflow photoreactor (1, 21) is differently dimensioned at least with respect to the total optical path length according to the initial transmission and the transmission change effected therein. The water to be purified is metered into the first circulation according to the transmission measured upstream of the throughflow photoreactor (1) and the transmission measured at the exit of the throughflow photoreactor. A feed pump (10, 13) for an oxidising agent forming oxygen free radicals under UV radiation at least in the first purification stage is controlled according to the initial transmission of the particular throughflow photoreactor. <IMAGE>