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:
Jan. 28, 1986
Filed:
Nov. 15, 1982
Marcel Faber, Princeton, NJ (US);
Jerome D Bernstein, New Hope, PA (US);
Matthew Grossman, Piscataway, NJ (US);
HRI, Inc., Gibbsboro, NJ (US);
Abstract
This invention provides a process for producing ethanol from a D-sugar in a continuous aerobic environment using a flocculant respiration-deficient mutant of Saccharomyces uvarum in a single stage fermentor with a cell settling tank and cell recycle, at a productivity of more than 50 grams ethanol per liter fermentor volume per hour. The process comprises (a) innoculating a fermentation zone with a respiration-deficient mutant of Saccharomyces uvarum; (b) feeding a mixture of a D-sugar, a nitrogen source, a vitamin source and a mineral source into the fermentation zone in the presence of oxygen, and (c) fermenting the D-sugar mixture for a sufficiently long period of time to yield an ethanol product. In the process, the yeast are allowed to settle for a sufficiently long period of time and recycled to the fermentation zone to increase ethanol productivity. The preferred D-sugar that may be used in the present process to produce ethanol, is D-glucose.