[Retracted] Nanomaterials for Food and Agriculture in Economic Valuation of the Technology Harvesting Maize Straw for Biogas Production in China

Figure 6

Fermenter schematic structure for biogas research (3 room area): water heater with temperature control, water siphon, and 3 safe child-forming liquid aids. 4 water jackets, 5 fermenters with a capacity of 2 dm³, 6 test tubes, 7 biogas transport pipes, 8 gas survey valves, and 9 biogas volume balanced supplies.