No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

C o d reduction




Occasionally we have problems overshooting our c o d limits in our final waste water discharge. I am told that ozone can be used to reduce c o d. is there anyone in metal finishing familiar with this process?.
How dose it work?, is it successful?.

Vinnie Mc Guinn
Lock Manufacture - Ireland
2005



I'm not familiar with ozone for this purpose, but you can add hydrogen peroxide to reduce COD.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina
2005


Ammonium phosphate can produce algae that can lower cod.

Teody Delgado
- Manila, Philippines
2006



Any strong oxidizer, such as ozone, peroxide,or peroxide plus UV light, can reduce COD under the right conditions and with enough reaction time.

To know the right conditions, however, you need to know a little more about what chemical(s) are causing the high COD, and whether they are dissolved or suspended solids.

Lyle Kirman
consultant - Cleveland Heights, Ohio
2006


I agree with Lyle, UV plus oxidising agents will reduce COD load to a large extent. there are instances where COD of value more than 20000 are reduced to 300 instantaneously.

Aravind A Narayan
- Coimbatore, Tamilnadu, India
2006




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"