Fermentor control system

Details Fermentor control system Fermentor control system

1985-03-01

1987-07-14

Jones, Larry

Chemistry: molecular biology and microbiology

Apparatus

Bioreactor

435291, 435315, 435807, C12M 136

Patent

active

046802673

ABSTRACT:
A method and an apparatus for controlling the concentration of oxygen and pH of a medium during a bioreaction process in a vessel. The method and apparatus are particularly adapted to a fermentation process. A dissolved oxygen sensor generates a signal corresponding to the pH of the medium and a dissolved oxygen sensor generates a signal corresponding to the dissolved oxygen in the medium. A valve mechanism selectively applies air, N.sub.2, O.sub.2 and CO.sub.2 to the medium. A controller produces a control signal for controlling the operation of the valve means so that a substantially fixed volume of gas consisting of one or more of air, CO.sub.2, N.sub.2 and O.sub.2 are added to the fermenting medium during a period of time. The controller determines in response to the dissolved oxygen and pH signals, the amount of CO.sub.2, O.sub.2 and/or N.sub.2 required to effect dissolved oxygen and pH correction. The controller further adjusts these determined values to compensate for the displacement of the CO.sub.2 added. As a result, the effect of the CO.sub.2 correction on the dissolved oxygen is substantially minimized.

REFERENCES:
patent: 3926738 (1975-12-01), Nyiri et al.
patent: 3941662 (1976-03-01), Munder et al.
patent: 4154652 (1979-05-01), Sawamura et al.
patent: 4424559 (1984-01-01), Lorincz et al.

Affiliated with

Also associated with

Rating

Fermentor control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fermentor control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermentor control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1427481