Research Article

Improvement of Biogas Production from Orange Peel Waste by Leaching of Limonene

Table 1

Methane yield of pretreated orange peel waste at different temperature, time, and peel/solvent ratio.

Temperature (°C)Time (min)Peel/solvent ratioCitrus waste sizeMethane yield (Nm3/kg VS)

UntreatedHomogenized0.131 ± 0.008
20101 : 2Homogenized0.101 ± 0.011
40101 : 2Homogenized0.097 ± 0.009
203001 : 2Homogenized0.040 ± 0.004
403001 : 2Homogenized0.051 ± 0.010
20101 : 12Homogenized0.071 ± 0.006
40101 : 12Homogenized0.074 ± 0.006
203001 : 12Homogenized0.094 ± 0.016
403001 : 12Homogenized0.060 ± 0.014
UntreatedChopped0.061 ± 0.004
20101 : 2Chopped0.177 ± 0.011
40101 : 2Chopped0.162 ± 0.015
203001 : 2Chopped0.134 ± 0.016
403001 : 2Chopped0.102 ± 0.017
20101 : 12Chopped0.217 ± 0.009
40101 : 12Chopped0.076 ± 0.011
203001 : 12Chopped0.120 ± 0.005
403001 : 12Chopped0.121 ± 0.016