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Letter 16033
Demulsification of effluent
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We have some dissolved oil in our factory effluent, and this is
causing tertiary treatment of effluent. Are there any methods to
separate dissolved oil of the the order of 50ppm. Any demulsifiers??
Physical separation methods??
G.Murali Mohan
- Hyderabad, India
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Hi Murali,
You can areate (bubble) the effluent by passing compressed air
from the bottom of the tank, the oil (suspended in the effluent) will
come to the top surface and form froth ... then you can effectively
skim the oil out. This is just an idea.. I have not tried it out..
you can try in lab before you apply or You can have a oil collection
tank or filteration prior to collecting the effluent in the main
collection tank.
Good luck ..
Karthik
- Singapore
First of two simultaneous responses -- ++
It depends on what is making the oil soluble. 50 ppm is a low
level. Clay is used to absorb oils and will settle out with your
other sludge. Powdered activated carbon should also work but is
usually more expensive than clay.
The US auto industry historically used calcium chloride and alum
to physically bind up oils. The Unipure process using ferrous iron
will probably work fine since it physically entraps oils.
Ed Cote
- Bloomfield Hills, MI, USA
Second of two simultaneous responses -- ++
WE HAVE A CHEMICAL PRODUCT WHICH SHOULD BE ADDED TO THE EFFLUENT
AND STIRRED; SUSPENDED OIL WILL BE SEPARATED AND WILL FLOAT ON THE
TOP OF THE TANK. THIS OIL MAY BE REMOVED BY SUITABLE METHOD:
OVERFLOWING, SKIMMING ETC.
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