total halogens Articles
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Used Oil vs. Waste Oil – What’s the difference?
Nice overview of differences between waste oil and used oil. I had thought most of us had a clear understanding of the difference between these two types of oil waste streams but during a recent ISO audit I encountered a site who labeled all of their used oil as “waste oil”. While these terms sound interchangeable there can be differences in how they are managed. First off, whether ...
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Degassing Refrigerators - Drill-head and Piercing-plier
1. For what purpose do we have to degas a refrigerator? A refrigerator has to be disposed as hazardous waste. The refrigerants inside a hazardous refrigerator are harmful for the environment (ozone depleting and greenhouse effect). Most common refrigerants are; R12, R134a and R600a. The uncommon is the removal of NH3. Refrigerants are developed to dissolve very easily into the compressor oil. ...
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Post-treatment of anaerobic effluent by ozone and ozone/UV of a
kraft cellulose pulp millPulp and paper mill effluents represent a challenge when treatment technologies are considered, not only to reduce organic matter, but also to reduce the toxicological effects. Although anaerobic treatment has shown promising results, as well as advantages when compared with an aerobic system, this process alone is not sufficient to reduce recalcitrant compounds. Thus, an advanced oxidation ...
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Biological activity of bleached kraft pulp mill effluents before and after activated sludge and ozone treatments
Eucalyptus bleached kraft pulp production, an important sector of the Brazilian national economy, is responsible for generating large volume, high pollutant load effluents, containing a considerable fraction of recalcitrant organic matter. The objectives of this study were to quantify the biological activity of the effluent from a eucalyptus bleached kraft pulp mill, characterize the nature of ...
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