Iron Removal

Dear All

I am designing a seawater filtration plant for water flooding project an a oil producing platform.  The influent iron contain of the source is in the range of 30 to 35 mg/l and we need to achieve a target of 1.5 ppm.  There is no RO membrane downstream and space is a big constraint on the platform.  

I am hopeful that strong oxidants will do the trick.  But wanted to know your experience on this.

Please suggest.

Best Regards

Anvar Mansuri

Taxonomy

• Oxidation
• Sand Filter
• Ozonation
• Ultrafiltration
• Produced Water Treatment
• Water Treatment & Control
• Industrial
• Filtration
• Chlorination
• Treatment Plants
• Filtration Solutions
• Water Treatment Solutions
• Membrane Technology
• Sea Water Filtration
• Membrane Filtration
• Filtration
• Hydraulic Fracturing Fluids
• Treatment Chemicals
• Total Suspended Solids
• Pretreatment
• water treatment
• Sustainable water purification

9 Answers

1. Our CHD-Ox Hydrooxidartion process works very well in such cases. Our oxidation stste in the radial reactors with process intensification converts the valency of iron instantly. If this interests you, please download the brochure of the product attached 

2. Chemicals will not do it, you must use a natural plant fiber to do this, then your polymers as a hybrid. There are several plant fibers which can be used, choose your own by researching which one is more available to you. Dried banana is one.

3. Strong oxidants will convert the ferrous to ferric ion, which then require a higher pH to form a ferric oxide precipitate, and then you do need a filtration or clarification step to remove the precipitate.  In treating acid mine water it has been found to be beneficial to recirculate a portion of the iron sludge back into the feed to promote more rapid formation and better settling of the precipitates.  This may also help in the case of sea water, but you would need to test it if you choose to go this route.  All the best and hope you are able to do this without polluting the sea surrounding the platform.

4.  Mr Mansuri

   I fully agree with Mr Gunther Johne .As ​space is your big ​constraint on ​the platform let us know Qty. water of ​seawater ​filtration ​plant you want to design.

5. Dear Mr. Mansuri,

   I suggested you use a two stage de-ironisation. Within the first stage the lumb of iron can be removed by a separetor and the second stage can be fitted as a filtervessel. An Oxidationstage should be planned accordingly. Should you require any help, do not hesitate to contact me. I will need a complete wateranalysis in order to be able to establish the process requirements and parameter.

   Kind regards,

   Jan-Peter Kiel

6. We have field tested our adsorbent media to removes Iron in water at site in Chowgacha Upazila - India, with low Fe contamination of 3.18mg/litre to high of 7.79mg/l with result of <0.01 mg/l.

   Contact me - if you are interested. 

   1 Comment

   1. I assume 3.18 to 7.79 mg/l was dissolved Iron only and not particulate, can you please confirm! Thank you.

7. We have technologies that create 45 families of oxidants from Any Water and maintain a residual of 3-5 ppm of chlorine & peroxide at the outlet using a simple patented oxidation process with a small footprint & high capacity (30-40,000 BWPD or more).  Contact me for additional discussions  

   1 Comment

   1. Iron is one of the elements we make inert & can be skimmed off in a simple skimmer tank.  

8. There is a nice and simple way to do this that works very well and will get you well blow the 1.5ppm Fe.  Inject on over caustic bleach such that you have a 0.1ppm total chlorine but you must also have the pH over 8.0. It is best to have a static mixer down stream of the bleach injection. Then use a mixed media filter or a ceramic MF unit. When we do this in well waters, we inject the bleach into the water's pump suction. That provides lots of mixing.  You must have the pH around 8 and a minimum of 0.1 residual chlorine to get the Ferrous to ferric oxidation to occur quickly. A little jar testing will let you know what blend of bleach and caustic you need for this water. Enjoy

9. Dear Mr. Mansuri,

   First, please determine how the iron content is composed, what is already present as solid particles and what is in dissolved form. The iron, which is already present as solid particles, should be filtered off first before the water is fed to an oxidation stage. Depending on the amount of iron present in dissolved form, the oxidation can then be carried out with atmospheric oxygen, chlorine, or ozone. After the oxidation stage, another filtration stage (e. g. MMF, UF, etc.) should follow.

   BR Gunther Johne