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. 2005 Aug 25;4:24. doi: 10.1186/1475-2859-4-24

Figure 4.

Figure 4

Photographs of biofilm particles of C. acetobutylicum P262 used in a fluidized bed reactor for the production of butanol from whey permeate. A) bonechar particles; B) biofilm particles after growth (bonechar particles are covered with biofilm layers).