Improving a photosynthetic bioprocess with a ubiquitous additive: Using clay powder in the cultivation of <i>Rhodopseudomonas palustris</i>.

ABSTRACT: A key challenge in process optimization is reactor performance, particularly in light-dependent bioprocesses. While novel photobioreactor designs exist, adapting established bioreactors with simple media supplementation may provide a more practical and modular alternative to complex mechanical modifications. In this study, we evaluated the effect of supplementing 0.2 % (w/v) clay powder on acetate production by Rhodopseudomonas palustris grown on butyrate. Among the clay types tested, kaolin showed the most pronounced benefits, with acetate accumulation increasing by 45 % relative to controls. These improvements are attributed to a combination of enhanced light distribution and increased cellular aggregation. Photosynthetic photon flux density measurements confirmed that kaolin redu

SUBMITTER: Stephens S 

PROVIDER: S-EPMC12550322 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature