«Let them eat xylose: Yeast engineered to grow efficiently on novel nutrients: Discoveries may lead to faster growth and higher cell densities in biological engineering applications.» (sciencedaily.com)
Ralstonia eutropha (R. eutropha), the model bacterium of this class, can grow to very high cell densities (> 200 g / L)[3]. (microbialcellfactories.biomedcentral.com)
Secretion and expression dynamics of a GFP - tagged mucin - type fusion protein in high cell density Pichia pastoris bioreactor cultivations (scirp.org)