The cultivation was performed in a 1000-L bioreactor.
The cultivation was performed in a 1000 L bioreactor.
Which is better? I find conflicting examples online. On Grammar Book I found this:
According to The Chicago Manual of Style, hyphens are never used between the numeral and the abbreviation or symbol, even when they are in adjectival form. Therefore write 12 mm focal length.
But then on the APS House Style page I found this:
Hyphenate when a number and a single unit of measure is used as a modifier or when a number and unit of measure is part of a compound adjective, e.g., "a 12-kDa fragment," "3 × 4-cm strip," or "2-μm-diameter tip."
So there's no definitive authority on this, and it's a matter of personal taste and corporate rules?