A high-temperature hydrothermal method for increasing biogas generated from garden waste
A garden waste, high-temperature hydrothermal technology, applied in the high-temperature hydrothermal field, can solve the problem of low biomass biochemical conversion efficiency, and achieve the effects of good sustainability, improved fermentation efficiency, and high-efficiency energy conversion.
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Embodiment 1
[0018] 1) Using water as the reaction medium, add the branches and leaves of Safflower safflower as the substrate in the high-pressure reactor, so that the substrate mass concentration is 5%, react at 180°C for 30min, and then follow the water mass ratio of 2:1 Add choline chloride to prepare a new reaction solution, continue to react at 180°C for 40 minutes to obtain a solid-liquid mixture, wherein the lignin removal rate of the substrate raw material is 70%, the cellulose retention rate is 95%, and the hemicellulose derivative Sugar yield was 85%.
[0019] 2) The solid-liquid mixture obtained in step 1) was directly inserted into the anaerobic fermentation strain according to the method reported in the literature (Bioresour.Technol.2018, 55, 205-212), and fermented for 30 days to obtain biogas. Compared to untreated feedstock, its total biogas production is increased by about 380%;
Embodiment 2
[0021] 1) Using water as the reaction medium, add the mixed garden waste of Phyllostachys pubescens and Taiwan grass as the substrate in the high-pressure reactor, so that the substrate mass concentration is 10%, react at 180°C for 60min, and then according to the mass ratio with water Add choline chloride at a ratio of 1:1 to obtain a new reaction solution, continue to react at 160°C for 60 minutes to obtain a solid-liquid mixture, wherein the lignin removal rate of the substrate raw material is 65%, the cellulose retention rate is 90%, half The cellulose-derived sugar yield was 80%.
[0022] 2) The solid-liquid mixture obtained in step 1) was directly inserted into the anaerobic fermentation strain according to the method reported in the literature (Bioresour.Technol.2018, 55, 205-212), and fermented for 30 days to obtain biogas. Compared with untreated feedstock, its total biogas production is increased by about 400%.
Embodiment 3
[0024] 1) water and choline chloride are mixed according to the mass ratio of 4:1 to prepare a reaction liquid, and mixed garden wastes such as sunflower leaves, eucalyptus branches, and safflower safflower branches are added in the autoclave as substrates, The raw materials make the substrate mass concentration 20%, react at 220°C for 30min, pour off the liquid, add the same amount of pure water, and continue to react at 200°C for 30min to obtain a solid-liquid mixture, wherein the lignin removal rate of the substrate raw material It is 80%, the cellulose retention rate is 80%, and the hemicellulose-derived sugar yield is 75%.
[0025] 2) The solid-liquid mixture obtained in step 1) was directly inserted into the anaerobic fermentation strain according to the method reported in the literature (Bioresour.Technol.2018, 55, 205-212), and fermented for 30 days to obtain biogas. Compared with the untreated raw material, its total biogas production is increased by about 450%.
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