A forced through flow membrane -reactor was used to study the formaldehyde catalytic oxidation process, dis- solved in oxygen -saturated aqueous solution. The commercial support was modified layer by layer with poly - cations and polyanions; the active phase of the catalytic membrane was gold nanoparticles dispersed over the macroporous surfaces of the membrane. Formaldehyde oxidation was performed at 30 and 60 ?C with three different formaldehyde concentrations, namely: 100, 300 and 500 ppm. The best performance 59% conversion was achieved for an initial 500 ppm after 240 reaction minutes. The reaction products were determined by GC. The catalytic membrane reactor shows good performance for the removal of formaldehyde at low temperature.