Remove phenol and high COD load in refinery and petrochemical wastewater with ozone. Designed not to replace biological treatment but to strengthen it.
The Problem
Refinery wastewater can contain 600–3,000 ppm of phenolic compounds and COD often exceeding 20,000 ppm. Phenol directly suppresses microorganism activity in the biological treatment plant, lowering the efficiency of standard activated-sludge systems.
Phenol suppresses the activity of microorganisms in biological treatment.
COD values exceeding 20,000 ppm strain standard treatment capacity.
Phenol's chemical structure doesn't break down easily with conventional biological processes.
Insufficiently treated wastewater risks exceeding tightening discharge standards.
System Concept
OCS-REFINERY TREAT offers a four-stage architecture tailored to refinery scale.
Phenol concentration, COD load, pH and existing biological treatment capacity are assessed.
A kg/hour-scale, high-pH-tolerant ozone system is sized to refinery flow.
Ozone is positioned before biological treatment (preventing microbial inhibition) or after (polishing).
For highly resistant loads, catalyst-supported ozonation increases removal efficiency.
Solution Areas
Pre-treatment of raw wastewater with high phenol and COD.
Aromatic hydrocarbon and refractory organic compound removal.
Final treatment stage after biological treatment.
Special wastewater with a highly resistant pollutant profile.
Technical Data
Why OCS-REFINERY TREAT?
High effectiveness backed by literature and field data.
Protects your existing biological treatment investment and increases its efficiency.
A design suited to the typical high-pH conditions of refinery wastewater.
The ozone + biological combination markedly increases total removal.
Can be positioned before or after biological treatment.
Every project is sized for its phenol and COD profile.
Application Sectors
Oil Refineries · Petrochemical Plants · Coking Plants · Chemical Production Facilities
FAQ
No — OCS-REFINERY TREAT is designed to strengthen biological treatment; by breaking down inhibitor compounds like phenol, it lets the biological system run efficiently.
The system is designed for the typical high-pH conditions of refinery wastewater; performance data shows high removal even under these conditions.
It depends on the pollutant profile. If there's microbial inhibition risk, before; if final polishing is needed, after. The site analysis determines this.
For highly resistant loads where standard ozonation falls short, catalyst support can increase removal efficiency.
Yes — it usually integrates into the existing biological treatment line and can be commissioned without major structural change.
Request a free feasibility assessment for your facility. Let's plan the solution that lowers phenol and COD load and strengthens biological treatment.
Request a Free Feasibility Assessment