Ozone treatments

Oxidation of fibres, delignification, brightening of waters

To delignify lignocellulosic fibres by oxidation of lignin
To oxidise cellulose of different fibre grades to create carbonyl and carboxyl groups
To improve the paper pulp mechanical properties
To oxidise solids in suspension in process effluents or in wastewater treatment plant waters

General informations

Since the 1980s, CTP has worked on the use of ozone in the pulp industry, generating numerous publications and some patents. CTP proposes an expertise in the ozone reactions on the lignocellulosic fibres.

The laboratory is equipped with 3 different systems for ozone treatments of different substrates at:

High consistency (>30%)
Medium consistency (5 to 12%)
Low consistency (< 3%), at different pHs

The treated substrates can be unbleached or bleached chemical pulps, high-yield mechanical pulps after primary and secondary refining and process effluents and WWT waters.