Case study 08 / 12 · Division I
Division I · Case Study 08
Petrochemical
Oil separation + DAF + Bio + Adsorption
Refinery and petrochemical effluents combine free and emulsified oil, phenols, sulphides, ammonia and aromatic organics. KEMISTA recovers oil, strips sour gases and applies multi-stage biology with carbon polishing.
98%
Oil & grease
95%
Phenol removal
90%
COD removal
Selected treatment train
Refinery effluent
→
API + CPI separator
→
DAF
→
Sour-water stripper
→
Biology (2-stage)
→
Sand + carbon
→
Reuse
Indicative influent characteristics
COD
mg/L
500–5,000
Oil & grease
mg/L
50–2,000
Phenols
mg/L
5–200
Sulphide
mg/L
10–500
NH₃-N
mg/L
20–400
BTEX
–
present
Typical removal by parameter
removal (%)
98%
Oil & grease
95%
Phenol
90%
COD
85%
NH₃-N
Why this configuration
Oil recovery via API/CPI separators and DAF before biological treatment.
Sour-water stripping removes and recovers ammonia and hydrogen sulphide.
Robust two-stage biology degrades phenols and aromatic hydrocarbons.
Carbon / AOP polishing secures trace-organic and toxicity compliance.
Your sector not listed, or a stream that defies the categories?
KEMISTA characterises the stream and engineers a bespoke train — that is what bench and pilot testing are for.