Method for improving anaerobic digestion gas-production performance of maize straws through directional acidification pretreatment
A corn stalk and anaerobic digestion technology, applied in fermentation, waste fuel, etc., can solve the problems of difficult microbial degradation of lignocellulosic raw materials and limit the large-scale application of corn stalks, shorten pretreatment time, improve equipment efficiency, reduce methane The effect of content increase
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Embodiment 1
[0022] (1) Straw pretreatment
[0023] The present invention selects corn stalks that have been naturally air-dried and has no mildew, crushes them to 20 meshes with a pulverizer, weighs a certain amount of corn stalks with a crucible, puts them in an oven at 105°C, and measures the TS of corn stalks after 12 hours. A blue cap bottle (1 L) was used as an anaerobic reaction vessel with a reaction volume of 0.8 L. According to the corn stalk load of 65 g TS / L, 52 g TS corn stalks were first weighed. The pretreatment reagent of the present invention is sodium hydroxide, and its addition is 2% of the dry weight of corn stalks, then adds 308.68 milliliters of water to make it and the total mass of water (3.32 milliliters) contained in the corn stalks be 2% of the dry weight of corn stalks 6x (312ml). Sealed and stored at 40°C for 1 day for pretreatment.
[0024] (2) Acidification method
[0025] The anaerobic fermentation process requires an inoculum (activated sludge). The acti...
Embodiment 2
[0032] (1) Straw pretreatment
[0033] The present invention selects corn stalks that have been naturally air-dried and has no mildew, crushes them to 20 meshes with a pulverizer, weighs a certain amount of corn stalks with a crucible, puts them in an oven at 105°C, and measures the TS of corn stalks after 12 hours. A blue cap bottle (1 L) was used as an anaerobic reaction vessel with a reaction volume of 0.8 L. According to the corn stalk load of 65 g TS / L, 52 g TS corn stalks were first weighed. The pretreatment reagent of the present invention is sodium hydroxide, and its addition is 2% of the dry weight of corn stalks, then adds 308.68 milliliters of water to make it and the total mass of water (3.32 milliliters) contained in the corn stalks be 2% of the dry weight of corn stalks 6x (312ml). Sealed and stored at 40°C for 1 day for pretreatment.
[0034] (2) Acidification method
[0035] The anaerobic fermentation process requires an inoculum (activated sludge). The activa...
Embodiment 3
[0042] (1) Straw pretreatment
[0043] The present invention selects corn stalks that have been naturally air-dried and has no mildew, crushes them to 20 meshes with a pulverizer, weighs a certain amount of corn stalks with a crucible, puts them in an oven at 105°C, and measures the TS of corn stalks after 12 hours. A blue cap bottle (1 L) was used as an anaerobic reaction vessel with a reaction volume of 0.8 L. According to the corn stalk load of 65 g TS / L, 52 g TS corn stalks were first weighed. The pretreatment reagent of the present invention is sodium hydroxide, and its addition is 2% of the dry weight of corn stalks, then adds 308.68 milliliters of water to make it and the total mass of water (3.32 milliliters) contained in the corn stalks be 2% of the dry weight of corn stalks 6x (312ml). Sealed and stored at 40°C for 1 day for pretreatment. At the same time, a group of corn stalks without pretreatment was set as the control.
[0044] (2) Acidification method
[004...
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