Question

What is the use of ‘blanket’ of inert nitrogen gas?

(a) Promotes aerobic condition development

(b) Prevents aerobic condition development

(c) Promotes anaerobic condition development

(d) Prevents anaerobic condition development

I have been asked this question in final exam.

I'd like to ask this question from Fermentation Laboratory in portion Equipping a Fermentation Laboratory, the Design and Preparation of Media for Bioprocesses of Fermentation Technology

Answer 1

The correct choice is (c) Promotes anaerobic condition development

Easiest explanation: In anaerobic cultures, the use of ‘blanket’ of inert nitrogen gas is to promote the development of anaerobic conditions in the liquid phase by the exclusion of gas. This blanket is highly pure, oxygen-free nitrogen.