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"5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL"

• Algae/Fungus/Biological Growth in Plating & Anodizing Rinse Tanks - June 17

• Removing Chrome Contamination from Glycol Cooling Loop - May 27

• Using waste pickle liquor (ferrous chloride & hydrochloric acid) to break an oil-in-water emulsion - May 22

• Filter to take zinc out of drain water so galvanized parts can be washed open Q. - April 11

• Cost of demineralizing water ("price per ton of water") open Q. - April 3

• High COD mixed bed polisher regeneration effluent open Q. - March 31

• Portable DI water columns fade at customer, but are fine when re-tested - March 28

• Cyanide Disposal/Destruction for school lab - March 11

• How to electrowin/recover copper (plating waste) open Q. - March 2

• Caustic & aluminum recovery from cleaning processes - February 21

• Recovery of copper from electroplating & etching solutions open Q. - January 19

• Recycling of Chrome Stripping solution (HCl) - December 30

• DM System Problem: Poor OBR, short SBA life open Q. - November 20

• TDS vs PPM vs. µS? - October 14

• Trivalent Chromium vs. Hexavalent -- what are the differences? - August 31

• Recycling of chrome sludge open Q. - August 14

• Ferrous Chloride vs. ferric chloride for reducing H2S levels open Q. - August 6

61445-1i Defects on test panel left in the water - June 2

• Can Trivalent Chromium degrade into Hexavalent Chromium? - May 3

• Dangers of drinking deionized water open Q. - April 19

• Methods for pH measurement in D.I. water - April 15

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