Method for preparing marsh gas by using lignocellulose
A lignocellulose and biogas technology, applied in the field of biochemical bioenergy, can solve the problems of shortened initial gas production time, cumbersome pretreatment process, time-saving, labor-saving, and economical savings, and increase accessibility and effectiveness location, saving operating costs and time, and improving the efficiency of raw material utilization
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Embodiment 1
[0030] Raw materials for extrusion and puffing: combine dry corn stalks with OH - The NaOH solution with a concentration of 0.01mol / L was mixed and soaked according to the ratio of material to liquid 1:5 (kg:L) for 8 hours, and then added to a large twin-screw extruder (Jinan Dayi Extrusion Machinery Co., Ltd.) for extrusion treatment. The operating parameters are: Sleeve temperature 90°C, screw speed 20(r min -1 ), with a moisture content of 20%, steamed and exploded once.
[0031] Mixing inoculation: wet the treated lignocellulosic raw material with water and use dilute H 2 SO 4 The pH is adjusted to 6.0, and the slag water after biogas fermentation is put into the mixed material to obtain a mixed material. The slag water in the mixed material accounts for 50%wt, and the lignocellulose raw material content of anaerobic fermentation biogas production is 5%wt.
[0032] Fermentation gas production: put the uniformly mixed material into a 10L closed reactor for anaerobic ferm...
Embodiment 2
[0034] Raw materials for extrusion and puffing: combine bagasse with H + The HCl solution with a concentration of 0.01mol / L was mixed and soaked for 10 hours according to the ratio of material to liquid 1:15 (kg:L), and then added to a DS322II single-screw extruder (Jinan Saixin Extrusion Machinery Co., Ltd.) for extrusion and puffing. The parameters are: screw speed 180 (r min -1 ), moisture content 70%, steamed and exploded 3 times.
[0035] Mixture inoculation: wet the treated lignocellulosic raw material with water and add Ca(OH) 2 The pH is adjusted to 7.5, and the mixed material of the sludge put into the sewage treatment plant accounts for 20%wt of the sludge, and the content of the lignocellulose raw material for biogas production by anaerobic fermentation is 30%wt.
[0036] Fermentation gas production: put the uniformly mixed material into a 10L closed reactor for anaerobic fermentation at room temperature, collect the biogas generated in the reactor on the 10th day...
Embodiment 3
[0038] Raw materials for extrusion and puffing treatment: Add dry corn stalks directly into the DS322II single-screw extruder (Jinan Saixin Puffing Machinery Co., Ltd.), add water for extrusion and puffing treatment, operating parameters: screw speed 180 (r min -1 ), moisture content 70%, steamed and exploded 3 times.
[0039] Mixing inoculation: wet the treated lignocellulosic raw material with water and use dilute H 2 SO 4 The pH is adjusted to 6.0, and cow dung is put in to obtain a mixed material. The cow dung accounts for 20%wt in the mixed material, and the lignocellulose raw material content of anaerobic fermentation biogas is 25%wt.
[0040] Fermentation gas production: put the uniformly mixed material into a 10L closed reactor for anaerobic fermentation at room temperature, collect the biogas generated in the reactor on the 10th day, measure the volume and composition of the biogas, and use the same biogas as the raw material that has not been extruded and expanded. ...
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