Table 2: Box-Behnken design for the Ca(OH)2 pretreatment of rice straw.

RunCodedUncodedResponse
LC
(%)
PT
(d)
IA
(%)
LC
(%)
PT
(d)
IA
(%)
Methane yield
(mL/g VS)

10−1−18320154.0
201181150200.0
30008735200.0
41−1012335156.5
50008735215.1
610112750190.0
701−181120155.9
80008735207.1
910−112720103.6
100008735228.2
110008735229.0
12−10−14720167.0
13−1014750190.0
14−11041135167.0
15110121135141.1
16−1−104335190.0
170−118350216.1

LC: Ca(OH)2 concentration; PT: pretreatment time; IA: inoculum amount.