Biological treatment of materials
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United States of America Patent
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Dec 8, 1998
Issued Date -
N/A
app pub date -
Feb 15, 1996
filing date -
Apr 12, 1993
priority date (Note) -
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Abstract
A method of biological treatment of materials by a combination of at least two groups of microorganisms forming sludges in at least two biological treatment zones treating the said materials wherein for purposes of increasing the treatment efficiency and stability at least one said sludges is conditioned in at least one sludge conditioning zone, whereby converting at least a fraction of at least one said group of organisms into organisms of another group, and thus forming the conditioned sludge, and the said conditioned sludge is fed in at least one said biological treatment zone.
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