| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 679000 | Bioresource Technology | 2016 | 7 Pages |
•This method shortened CS NaOH pretreatment time by 33.3%.•Sugar release rose by 23 mg in 2–6 Hz and fell by 18 mg from 1 g dry CS in 6–10 Hz.•High flow rate is conducive to the increase of sugar yield.•RSM was used to optimize key processing parameters for maximal sugar yield.•Optimal conditions were 6.71 Hz, 0.50 L/min and 1.02% NaOH for CS pretreatment.
To promote NaOH pretreatment of corn stalk (CS), a continuous processing system uniting magnetic field and millimeter-scaled channel flow was established. First, four comparative pretreatments were conducted: (I) CS was pretreated with NaOH under traditional agitation; (II) CS was pretreated with NaOH in a flowing state inside the millimeter-scaled channel; (III) CS was pretreated with NaOH in a flowing state and under a static magnetic field; or (IV) CS was pretreated with NaOH in a flowing state and under a rotating magnetic field. By comparison, the highest pentose (121.22 mg/g dry CS) and hexose (287.04 mg/g dry CS) yields were obtained in the shortest pretreatment time with Pretreatment IV (8 h). Accordingly, the key parameters of Pretreatment IV were optimized as 6.71 Hz frequency, 0.50 L/min flow rate, and 1.02% NaOH concentration. Under these conditions, 439.24 mg sugars were released by 1 g dry CS during pretreatment and enzymatic hydrolysis.
