| http://www.w3.org/ns/prov#value | - Thus the speed of the fluid can for example be regulated in such a manner that the substance iscontinually held in suspension in a predetermined position.In an advantageous method, in addition to the upward flow within the bioreactor a downward flow is also produced, with a gaseous fluid such as air or oxygen being supplied to the downwardly flowing fluid, usually a liquid.
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