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Fig. 4 | Biotechnology for Biofuels and Bioproducts

Fig. 4

From: Maximizing biohydrogen production from watermelon peels using Clostridium butyricum NE133: a statistical optimization approach with Plackett–Burman and Box–Behnken designs

Fig. 4

Response surface plots of hydrogen production by C. butyricum using independent variables: A initial pH and WMP concentration, B initial pH and ammonium acetate, C WMP concentration and ammonium acetate, D initial pH and sodium acetate, E WMP concentration and sodium acetate, F sodium acetate and ammonium acetate

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