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Exploring the: Water Zone
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- On-Site Treatment or Off-Site Disposal
- Can you provide information on a pH/precipitation system that will speed up the process of removing metals and patina chemicals from wastewater?
Ask an Expert Published: 2/22/2013
- Clean Wastewater Attacking Zinc Plate
- We use ion exchange treatment for wastewater from our nickel, hexavalent chrome and zinc plating rinses. What kind of characterization should we do to identify the pollutants that are affecting our products, and what steps are needed to reuse this w...
Ask an Expert Published: 2/21/2013
- Chrome Reduction
- What is the best way to reduce hexavalent chrome to trivalent chrome from an aluminum conversion coating rinse water?
Ask an Expert Published: 1/7/2013
- More PVC Pipe Glue Discussion
- I would like to comment on the ongoing pipe glue discussion from your November 2011 column. Users concerned about caustic service could look for what one manufacturer calls “industrial PVC cement” which is made without the fumed silica thickener. Fo...
Ask an Expert Published: 3/1/2012
- Nitrites and Fragrances
- We are using a vibratory finishing compound that has been satisfactory for more than 20 years. Recently, a potential new vendor pointed out that it contains sodium nitrite and said we are violating the law in using it. We checked with our supplier, ...
Ask an Expert Published: 1/26/2012
- Stench!
- When our mass finishing equipment is started after being shut down a week or more, an extreme stench emanates from the entire system. How can we control this problem?
Ask an Expert Published: 1/25/2012
- Pipe Glue, Revisited
- I’ve contacted several plumbing suppliers and none of them were able to assist me in finding the glue you recommended for CPVC pipe or the pipe tape. We are seeing exactly what you were talking about on a leaky pipe containing caustic or alkaline s...
Ask an Expert Published: 1/24/2012
- Where is the Pipe Glue?
- I have contacted several plumbing suppliers around me, and none of them were able to assist me in finding the glue that you recommended for CPVC pipe or the pipe tape. We are seeing exactly what you were talking about on leaky pipe containing causti...
Ask an Expert Published: 10/25/2011
- Caustic Piping Remedies
- When I reviewed our operations, I was struck by how many of our PVC and CPVC piping joints that carried either caustic for wastewater pretreatment or alkaline cleaner exhibited a crusty scale, apparently dried caustic residue.
Ask an Expert Published: 5/1/2011
- Phosphates in Wastewater
- I am charged with finding the sources of phosphorus in our plant. Our main process effluents are from mass finishing and washing machines. I have not found significant phosphorus in these fluids, and yet, we are close to the limit. What am I missing...
Ask an Expert Published: 1/11/2011