2 replies to this topic

[Ayok]

Please help me to solve this everyone. I really need it.

I have waste water containing 12 - 14 ppm iron. The only impurities i want to get rid of is iron. I ever test the sample and the settling time is about 5 hours to completely separate iron from water. The flowrate of waste water is 10,5 m3/hr. I really have big difficulty in finding reference about designing circular clarifier that only have sedimentation function because in general, clarifier have function to disgest the organic matter.

Thanks for anyone that help me

[breizh]

http://www.filtratio...ener/sld001.htm

 

Consider this power point .You may also take a look at Perry's chemical engineers handbook.

 

Hope this helps

 

Breizh

[siretb]

Think of it this way:

In a circular clarifier most of the stream will travel upwards,. So the flow travelling upwards will have an average velocity. You define this velocity (clear stream rate/ section)

You have to make sure that this velocity is lass than the settling velocity.

 

Note that the disrtance (vertical) travelleed divided by the velocity is a residence/travel time.

I hopr this will help.