Stephen R. Schulte P.E. REM
Recycling Metals
Is there a process or commercial equipment to electrodeposit Zn, Ni, Cr, Fe, and remove the heavy metals from the wastewater?
Read MoreTreating for BOD from E-Coat
What is the most effective treatment for reducing BOD anolyte? Is a small carbon absorption unit on the overflow line the solution?
Read MorePollution Control for Anodizing
What pollution control equipment do you recommend for a small aluminum anodizing operation with a 500-amp rectifier?
Read MorePaint Stripping Waste Disposal
In response to a question in the September 2012 column regarding the disposal of waste from paint stripping, one reader recommends purchase of a stripping oven, used to strip products and paint racks.
Read MoreOn-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?
Read MoreClean 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 water?
Read MoreChrome Reduction
What is the best way to reduce hexavalent chrome to trivalent chrome from an aluminum conversion coating rinse water?
Read MoreNickel Recovery from Filter Press Cake
Is the recovery of nickel metal from waste sludge considered recycling, reusing or reclaiming?
Read MoreFloating Floc Causing Issues
We are a contract finisher with anodizing, alkaline zinc plating, electrocoat and powder coat capabilities. Our processes are well-established, but a few days ago we suddenly experienced floc rising, rather than settling, in our waste treatment. What I should check?
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EHS Q&A: Waste Treatment for Paint Stripping
Q. We will be using concentrated sulfuric acid to strip e-coatings from reject metal parts ... Unfortunately, our only outlet for discharge of this waste is to a nearby storm drain, and we know that we will need to remove the paint sludge and color and to neutralize the pH before discharge. Can you advise?
Read MoreWaste Treatment for Paint Stripping
How can we remove paint sludge and color and neutralize the pH from paint stripping acid before discharging waste to a storm drain?
Read MoreArc Flash PPE Selection
I’ve been hearing a lot about arc flash protection lately, but I’m not sure if it applies to our operation and, if so, what the requirements are for providing personal protective equipment under this standard. I know it has something to do with our electrical power supply and equipment. Can you help clarify?
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