Fig. 6From: Direct IBE fermentation from mandarin orange wastes by combination of Clostridium cellulovorans and Clostridium beijerinckiia Butanol yield in the culture supernatants with C. beijerinckii from removed peel and strained lees with or without C. cellulovorans. Values are mean ± SE of four independent samples. b Concentration of reducing sugar in the culture supernatant from removed peel and strained lees with or without C. cellulovorans. Closed and hatched bars indicate before addition of C. beijerinckii and after addition of C. beijerinckii, respectively. The cultivation time was for 18 days. Values are mean ± SE of five independent samplesBack to article page