Effect of deep eutectic solvent pretreatment on biohydrogen production from corncob: pretreatment temperature and duration.

However, when the pretreatment temperature increased further, the cumulative hydrogen yield decreased gradually. The variation law of the hydrogen production rate of pretreated corncob was consistent, showing a first increasing and then a decreasing trend, and the hydrogen production rate at a DES pretreatment temperature of 50°C was as high as 9.71 mL/h ( Figure 2b ).

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