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oily wastewater treatment

oily wastewater treatment

oily wastewater treatment

(OP)
1. sourse of wastewater: airport fuel tank cleaning wastewater
2. flow rate: 3m3/h
3. oil content in wastewater: about 500~1000ppm
4. COD in wastewater: about 1000
5. the requirement standard:
    after treatment: COD<100; oil content<5ppm
Would you please help me find an optimal method?
Thanks so much!

RE: oily wastewater treatment

Do you have free oil or emulsion?  Not sure about the optimal method, but try these options :

a) oil-water separator : some companies (Landa for example)are specialized in cleaning wastewater.  

b)evaporation : no chemicals, minimum of sludge, low maintenance...no discharge!

RE: oily wastewater treatment

Yes, a system may contain:
- API or CPI oil-water separator for primary treatment
- Air flotation unit for intermediate treatment
- Biological oxidation for secondary treatment to reduce BOD
- Activated carbon adsoprtion for tertiary treatment to
  reduce COD
- Perhaps also, final holding basin with aerators.

Optimal method is likely a combination of these processes, depending upon performance of each unit operation (bench scale or pilot testing may be required) and site economics.

Good luck.

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