Pollution Control
NITRATE TOXIC RELEASE REPORTING
We use a significant amount of nitric acid, and I know nitric acid contains the nitrate ion. I checked past Form R reports, and we have been reporting nitric acid. I am concerned because I cannot find any backup calculations or explanations on where the numbers on the forms came from, and they look like they had been copied from year to year. Is there something that I should be concerned about?
Read More
French Revolution
An urban bike Movement is sweeping Paris, and French custom coater Solyap is riding the wave
Read More
Remove More Nox
Do you have any ideas to reduce the yellow/brown color of air emissions from our nitric acid-based aluminum bright dip process?
Read MoreNeutralizing pH
I am our facility’s environmental, health and safety manager. Periodically, we have very high-pH wastewaters that cause the pH within the cyanide oxidation step to be well above our desired upper limit of 11. Our operator has requested that we add sulfuric acid into the cyanide oxidation stage whenever the pH rises above 11. I am very concerned about the release of hydrogen cyanide if something goes wrong and the system accidentally drives the pH well below 7. Are there any safer acid substitutes?
Read More
New Finishing Technologies Taking Off
Trends in coating and finishing for aerospace and defense
Read More
Rethink Your Cleaning Process
Modern vapor degreasing systems are environmentally friendly, save energy
Read MoreMaximize pH Sensor Performance
Over the last several months, we have had difficulty with calibration of our pH sensors, particularly the pH adjustment sensor that controls pH in the range of 9.1– 9.5 for precipitation. Somehow the sensor still works well enough for us to achieve metal precipitation to maintain compliance, although our effluent’s metal concentrations are a little higher than in the past. We feel very uncomfortable continuing this way. Any ideas to help?
Read MoreEvaporation Water Loss
Do you know of any papers or charts that give water evaporation rates? We have an opportunity to reduce our cleaner tank temperature from 180 to 80°F and want to know how much water we can save.
Read More
