Pollution Control
Changing from Lime To Magnesium Hydroxide
We are considering switching to magnesium hydroxide since jar tests performed by a chemical supplier indicate a 30% reduction in filter press cake at a pH of 8.5. Our flow consists of 2/3 tumbling and 1/3 nickel-chrome plating with a combined flow of 60 gal/min. Is this realistic?
Read MoreDefining RCRA-Hazardous Waste
One company said since our waste stream had a lead concentration of 40 mg/liter and this is over the TCLP threshold of five mg/liter, it is a RCRA-hazardous waste and gave us a quote from transportation and disposal as such. The other company claimed they can handle it as a non-hazardous waste since the waste stream’s concentration is less than 19 times the TCLP threshold of five mg/liter. Obviously, disposal as a hazardous waste is much more expensive than non-hazardous waste. Can you help us decide which way to go?
Read MoreReporting Lead
As the quality manager of a large job shop metal finishing facility and recent restructuring, I now have responsibility for environmental issues. While we knowingly do not purchase any lead or lead containing products, nonetheless, we know lead is present due to detectable concentrations found in our wastewater treatment filter press cake; lead is always non-detectable in our wastewater discharge. How do I better document whether or not I need to report for lead?
Read MoreEmissions Equipment
I am looking for advice on emission equipment to meet 10 pounds per day requirement for releasing isopropyl alcohol. Our current process emits about 30 pounds per day of isopropyl alcohol into the air.
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How to Maximize CARC Spraying Efficiency
Fleet Image uses a combination of finishing technologies
Read MoreSpent Bulbs as Hazwaste Part II
In your reply to DW in the January issues (“Spent Bulbs as Hazwaste”), you stated that New York and California mandates that all spent fluorescent bulbs are to be recycled no matter their mercury content. That statement is partially true. In New York there is an exemption for small businesses.
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