Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

Chime right in! (no registration req'd)

-----

"Waste Water Troubles"



 

The company manufactures solar products. The most important is the manifold that is placed in a solar collector.This manifold is made of Cu and coated with a state of the art finish that carries great optical qualities for harnessing solar heat. Which means in the solar spectrum the finish has great absorption and low emissivity. The plating line is automated and generates a small volume of waste effluent (35 gpm). Due to the engineering of the line our problems of waste treatment are a head ache. We are not generating enough waste metal in the effluent to treat it properly. As a small quantity generator I am open to suggestions on how to resolve this. Currently we are using DTC as a coagulant and we either over dose or underdose the waste stream. The metals in the stream are nickel and copper. Should we introduce Aluminum in larger amounts and if we do this are we just creating more consumption of the DTC?

Raymond Villalva
- Jacksonville, Florida
^


 

Everything is relative, but I don't consider 35 GPM a small amount of waste water. If the dissolved metals are truly low, you probably have a good application for ion exchange, which should remove the metals to essentially zero. When the ion exchange resin is regenerated, the same metal will be in a much smaller volume so you will have the metal loading you seek.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^


 

You need the right chemistry and better controls for it. While I would never support the use of DTC as it is highly toxic to your aquatic friends down in FL, there are several alternative chemistries that can work very well, even at low influent levels. They produce a smaller amount of sludge, are controllable with specific ion probes, and are economical to use as they are almost an order of magnitude stronger than DTC, meaning you use less.

I agree with Ted - 35 GPM is not a small flow. If your loading is THAT low, you should consider a small recycling system that would produce only a few hundred gallons of water per day on average and get you the high purity water that I suspect that you seek for your process. You can get better than 1 meg-ohm water from waste water with the right system design. and you get the luxury of being able to batch treat the regenerants when and how you like before you ever discharge them.

tom baker
Tom Baker
wastewater treatment specialist - Warminster, Pennsylvania
^

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA