Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

We are having high levels of Phenol, 2,4-Dimethylphenol and Chloroform in our waste water stream




Our TTO's for a waste water sample (daily limit-2.13 mg/l) was 14.20 mg/l mainly from 2,4-Dimethylphenol---10.300 and Phenol--3.900 which put us in violation with the city water department. We are usually only dumping about 400 gallons to the city each day in a manual batch filter press 1.3cu/ft using Cleartreat 2004G as a flocculate. Our next sample was TTO---1.62 with Phenol--.194 mg/l, 2,4-Dimethylphenol--1.410 mg/l and Chloroform-.122mg/l. We mainly use KOH and Nitric Acid to remove Aluminum, Copper, Tantalum, Titanium, Cobalt and Nickel from mainly Stainless Steel parts. We have seen lower levels of the Phenols in the past but not this high. We would appreciate any help on this issue

Larry D [last name deleted by editor due to nature of posting]
parts cleaning - Dallas, Texas
2006



Adjust the pH to about 5, add 50 - 100 mg/l ferrous sulphate ferrous sulphate [affil links], then a little (1 - 2 liters) 35% hydrogen peroxide. Then, stir overnight. This is the good old classic "Fentons Reaction" that dates back to the 19th century. This should kill your phenols. Do this after metals removal, as long as your POTW doesn't mind some iron in your discharge.

dave wichern
Dave Wichern
Consultant - The Bronx, New York
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"