TCF (Totally Chlorine Free) pulp bleaching with ton/hour-scale ozone production. Zero AOX and dioxin risk, export-standard brightness.
The Problem
Conventional ECF (Elemental Chlorine Free) bleaching uses chlorine dioxide and can form persistent, toxic by-products such as AOX (adsorbable organic halogens). For producers selling to the European market, this is increasingly becoming a commercial barrier.
Chlorine-dioxide-based bleaching can leave persistent toxic compounds in water ecosystems.
Some European customers accept only TCF (Totally Chlorine Free) pulp.
Supplying chlorine and chlorine dioxide requires a logistics chain with storage and safety risk.
The chlorine bleaching process also requires chlorinated by-product management in wastewater treatment.
System Concept
OCS-PULP BLEACH offers a four-stage architecture tailored to large-scale pulp production.
The plant's production volume, target brightness (ISO) and current bleaching sequence are assessed.
An oxygen-fed architecture and industrial cooling system are designed for ton/hour-scale ozone production.
The ozone bleaching stage (Z) is integrated into an existing or new Q-(OP)-Z-(PO) type sequence.
Beyond the bleaching line, ozone is also evaluated as a tertiary stage in wastewater treatment.
Solution Areas
TCF-certified softwood pulp production.
Bleaching dosage adaptable to different fiber types.
Ozone + biofiltration combination on the bleaching line's wastewater.
Transition projects from a chlorine bleaching line to TCF.
Technical Data
Why OCS-PULP BLEACH?
High-capacity engineering suited to large pulp production lines.
Chlorine-free bleaching compliant with European export standards.
Chlorinated by-product formation is structurally eliminated.
The same technology adds value in both bleaching and tertiary treatment.
A mature technology deployed at multiple facilities in Europe.
Every project is sized for its fiber type and capacity.
Application Sectors
Paper & Pulp Mills · Export-Focused Kraft Pulp Producers · Packaging Paper Production · Tissue Paper Production
FAQ
Usually the ozone stage is integrated into the existing bleaching sequence; a gradual transition is possible without full structural change.
Applied at the correct dose, ozone bleaching can provide brightness and quality equivalent to ECF; field references confirm this.
It can be used on softwood and hardwood kraft pulp; dose and sequence are optimized by fiber type.
Oxygen-fed design and VSA integration increase energy efficiency; a concrete cost projection is provided in the site analysis.
No — this is a separate design decision; on request, ozone + biofiltration is also integrated as tertiary treatment.
Request a free feasibility and scaling assessment for your facility. Let's build the transition plan to chlorine-free pulp bleaching together.
Request a Free Feasibility Assessment