No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Varying feed (waste) nature and COD of final clear water

Q. The waste water from a paint factory- The waste splitting and settling is done with coagulants, flocculants, bit of chlorine and pH adjuster. The nature of the feed when treated varis sometimes and mostly extra additions of chemicals required. However, I manage to get clear water at the end. The final COD is the problem. I have tried passing compressed air, but no significant reduction. Waste contains some organic content like phenols and styrenated dispersions (additives like surfactants and emulsion binders used for water based paints). The final COD I got so far is 2450 and the requirement is 150. How can I get to these levels of COD? COD of the feed waste is in the range of 15,000- 20,000.

Ramachandran PP
paints - Manama, Kingdom of Bahrain
October 26, 2009

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: