Bioreactor and Process for Microbial Gas Fermentation

A Y-type bioreactor for microbial gas fermentation comprising an aeration chamber provided with means for mixing a culture broth contained within, the bioreactor comprising:

• at least a first and a second gas feeding chamber suitable for containing, respectively, a first and a second gas;
• at least a first duct configured for connecting an outlet terminal of said aeration chamber to at least one respective inlet of each of said first chamber and of said second chamber, and for introducing the culture broth coming from said aeration chamber into said first and second gas feeding chamber with consequent mixing of said culture broth with, respectively, said first and second gas;
• at least a second duct configured for connecting an outlet terminal of said first gas feeding chamber to said aeration chamber;
• at least a third duct configured for connecting an outlet terminal of said second gas feeding chamber to said aeration chamber;
• at least one pump arranged in interception of said first duct, for the conveying of said culture broth;
• and
• at least one outlet channel, having an inlet thereof arranged between a median height and a top of said aeration chamber, said outlet channel being configured for a continuous outflow of parts of said culture.