The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1983
Filed:
Jul. 26, 1982
Enrique R Witt, Corpus Christi, TX (US);
William J Humphrey, Corpus Christi, TX (US);
James P Cave, Corpus Christi, TX (US);
Celanese Corporation, New York, NY (US);
Abstract
Treatment of waste streams, particularly acidic petrochemical wastes, in anaerobic filter at high loadings with high rates of recycle. The effluent from the top of the filter is passed into a gas-disengaging-solids-settling zone containing a quiescent body of the liquid of said effluent. Particles of solid biomass settle in that liquid body and are withdrawn, with the liquid, and recycled to the base of said filter together with fresh acidic waste and added inorganic alkaline material. The outfall from the filter is fed to an aerobic digester and the resulting activated sludge is recycled to the filter. The alkaline material is preferably magnesium oxide or carbonate. Sodium formate may also be used as the alkaline material.