Schematic drawing of coupled photo- Fenton-biological flow reactor.
Photochemical reactor. Lamp: 400 W medium pressure Hg lamp. Mixing flask 1: 1 L. p-NTS solution fed into the coil reactor from a 20 L feeding tank, DOC concentrations up to ca. 350 mg/L. H2O2 automatically added by means of the peristaltic pump 1. Solution re- circulated at 22 L/h through the illuminated part of the reactor by pump 4. pH neutralised by NaOH at the outlet of the reactor via pump 3.