Process and apparatus for treating wastewater from lead battery production
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United States of America Patent
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Oct 24, 1995
Grant Date -
N/A
app pub date -
Jun 27, 1994
filing date -
Jul 8, 1993
priority date (Note) -
Expired
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Abstract
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate and excess lead oxide, is returned directly to production of the active mass paste. The mother liquor, after a possible use as cleaning water, is subjected to another neutralization with lead oxide, separate from the wastewater received from the electrode washing procedure in view of its possible content of impurities. The resulting lead sulfate is sent to a metal-processing facility for recycling. The neutral mother liquor, after the removal of lead residues by conventional precipitation methods and filtration, is discharged as treated water.
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