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Home > Forums > Chemical Engineers > Activities > Chemical environmental control Forum

oily water treatment

thread127-285302
Read More Threads Like This One
Hallez (Chemical)
8 Nov 10 9:03
Hi All!Does anybody know how can we design a dissolved gas flotation unit for the treatment of oily water? Thanks a lot...   
orenda1168 (Chemical)
8 Nov 10 11:24
Rather than reinventing the wheel, Google "dissolved air flotation" for a number of companies who supply these units.
 

Orenda

Hallez (Chemical)
9 Nov 10 2:11
Thanks Orenda, I'd like just to ask you about a standard API (or an other standard)that design a dissolved gas flotation for treatment of oily gas.
orenda1168 (Chemical)
9 Nov 10 11:19
I don't know of a DAF standard as such. Perhaps others on this forum have better information.

Orenda

Hallez (Chemical)
10 Nov 10 2:34

Anyway, thanks a lot Orenda...
hprorelis (Materials)
19 Nov 10 9:58
Ceramic membranes are able to separate oil and water with a maximum oil content inside filtrate about 5 ppm.
These type of membrane are laready used onboard for bilge water treatment.
Orelis Environment, located in France, provides KLEANSEP membrane (www.orelis.com)
Best regards
Herve PRADELLE
Senior Business Manager
herve.pradelle@orelis.com
Hallez (Chemical)
20 Nov 10 5:16
Thank you hprorelis for these informations. This technique is very interresting but in our  case we're applied to design a flotation gas unit.   
shahyar (Chemical)
21 Nov 10 0:07
Some rough criteria:
1. Decide if you want straight flow saturation, partial flow saturation or recycle flow saturation. If your plant is small, go with straight flow saturation, other wise recycle flow saturation is the most popular.
2. Design saturation vessel based on 5 min residence time.
3. Design your flotation vessel based on 1-2 hours residence time depends on your temperature.
Hallez (Chemical)
22 Nov 10 2:26
Thank you shahyar.Some parameters of our design are listed below:
Flow rate = 200 m3/h
oil content = 200 ppm
Temperature = 40 °c
We want recycle flow saturation.  
bimr (Civil/Environmental)
24 Nov 10 19:04
Saw this article today. Maybe it will help:

http://www.pollutionengineering.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_10000000000000934365
Hallez (Chemical)
25 Nov 10 3:00
It's excellent website bimr.Thank you for your help...
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