METHOD AND PLANT FOR THE BIOLOGICAL OXIDATION OF FORMALDEHYDE AND PHENOL IN AQUEOUS SOLUTION

摘要

The present invention relates to a method for the purification of sewage containing formaldehyde or phenol or a mixture of the two substances, by means of biological oxidation in rotating biological contactors provided with cylinders (1) made of plastic netting. The biological oxidation process uses a mould, isolated by the inventor, from a fibrous wood deposit treated with urea-formaldehyde resin.