ferrous Chloride use for waste water oder control 3

[Greenpower]

Does anybody have any experience in odor treatment using ferrous chloride at lift stations? We first started using Calcium Nitrate, and it work very well, but we started looking for cheaper and, change to ferrous sulfide, we had some luck with it but it would corrode stainless steel and was not as strong as the first meaning we had to use twice as much, we are getting away from it because it ate the bearings out of a grinder.

We are going to change to the chemical ferrous chloride, and were needing to know if our current setup we used on past chemicals is going to work with the chemical. We store our chemical in neoprene tanks and use PVC piping from the tank to our wet wells, will the ferrous chloride corrode the tank and pipes, and will corrode the bearings in our grinders. Are there any other problems with this chemical that we should know about?


Any suggestions are greatly appreciated.

 

[glennpan]

Greenpower,

I have a bit of experience in material selection for handling ferrous chloride. The Neoprene lined tanks and PVC piping will be fine (at ambient temperatures) for handling the ferrous chloride. However, keep in mind that this chemical is brutal on most metals, and much more agressive than even the ferrous sulfide that you mentioned. What are the material of construction of your bearings?

glennpan

 

[ischgl99]

Magnesium Hydroxide is a safer and cheaper alternative to ferrous chloride for odor reduction. It is non-toxic and non-corrosive, so you don't have to worry about your employees safety or the corrosion of your piping. Mike Bensema

http://www.dutchmenservices.com

 

[waterexpert]

Alkalis work in a different way to ferrous chloride, which gives a practically irreversible reaction. They do not destroy sulfide. Volatilization will occur once the pH is neutralized. They have limited applicability (typically not cost-effective for H2S levels > 10 mg/L)and may change or worsen odors.Removal of H2S to low levels may be cost-prohibitive.

As well as Ferrous Chloride, Hydrogen Peroxide and a number of proprietary products are used here in the UK.

Magnesium Hydroxide is actually quite a bit more expensive than ferrous choride in my experience,on the basis of quantity required for aour control.

Seán Moran

http://www.expertise-limited.co.uk

 

[ischgl99]

Synthetic Magnesium hydroxide is expensive, but it is also naturally occuring in Brucitic Marble, which is far cheaper. There was a study done in California on odor control with the different products, comparing the effectiveness and price. I can dig it up if you are interested in it. Don't know the answer about corrosion of the grinder bearings, haven't heard of any problems since the concentration in the sewage should be low enough that it shouldn't be a problem, but I would recommend calling some plants that are using ferrous and ask them. Mike Bensema

http://www.dutchmenservices.com

 

[dicksewerrat]

And remeber that is not an odor, that is the aroma of our paycheck.

 

[EcoSafe]

Odour Control in Lift Stations is very effective using essential oil complexes and an advanced distribution system, which can react to demand.
The running costs are favourable with other methods and no dangerous substances are used. The result is significant asset protection, proven odour neutralisation and low cost start up infrastructure.

For more information please contact karl@eco-safe.com.au

 

[MAJOSA]

Check out

http://www.zeolife.co.uk

or contact markbaty@euremica.com for information on odour removal using Natural Zeolite

 

[Berko]

Have you looked at using the Hidrostal Pre-Rostal pump system.

It has a skimming action at the end of each pumping cycle, allowing all floatables (oils, fats & scums) to be entrained into the pump & thus pumped away.

It is the fats & oils sitting on the liquids surface which usually causes the odours.

Pre-Rostal systems have virtually self cleaning sumps.

I have seen Ferrous Chloride in action & it ate through 316 SS pump lifting chains (you can imagine what it did to the submersible pump !!). Not sure though if the sewer maintenance engineers didn't get their dosage a bit too high though !!

Take care,

Berko