Refinery Wastewater Treatment

[Muggle]

Were working on a design for revamping existing oil-refinery wastewater system in Eastern Europe - one of the aspects is the storm water. Equals 36,000,000 gallons in 24-hours. The oil/PAH/THC/Aromatic is not of issue for us to remove - but there will be heavy precipitate at the end of the treatment process from oxidized metals and organics - other then sand beds - anyone know of a good 10-20 micron filtration system to handle 25,000gpm flows rates - or something close to 5-6,000gpm as we can split the flows?

We also figure static screen and possibly parabolic screens for the dirt/leaves/mud,etc - unless you all have some reference we don't know about?

Thanks -
Dave

 

[JJPellin]

Unfortunately, I am not aware of any solutions that meet your requirements. I work at a large US oil refinery. Our storm water processing ends up in polishing ponds to allow the particulate matter to settle to the bottom before discharge into the river. Of course, we have the luxury of space for these ponds. If we couldn’t use the ponds, I don't know what we would do. I have heard of continuous cleaning rotary screens that might be capable of flows this high. But I doubt they could achieve the level of filtration you specify. Good luck. This will be a challenge.

 

[IFRs]

Perhaps USFilters could help you. Try their web site, if you think it is worth a try I can give you a name. Also you might want to check out hydrocyclones and/or air-sparged hydrocyclones. Again, if you think there is promise there I can point you to a person who knows more.

 

[JJPellin]

Hydrocyclones is an interesting idea. I have seem them used on recycled coker cutting water at a refinery with good results. The only problem is that you still need a system to process the slurry off the bottom of the cyclones. But since the volume would be much lower, options that would not work on the entire stream might work on the slurry stream.