Method for evaluating anaerobic digestion performance of lignocellulosic feedstocks by pretreatment intensity
A technology of lignocellulose and anaerobic digestion, which is applied in the field of organic solid waste treatment and disposal - anaerobic digestion, can solve the problems of difficult implementation and heavy performance evaluation workload, and reduce the experimental workload and mathematical model Calculation and fitting, the effect of saving anaerobic digestion time
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Embodiment 1
[0064] (1) Hydrothermal pretreatment
[0065] Weigh 20g of corn stalks and calculate with raw material TS. The pretreatment experiment is divided into two groups, one group is hydrothermally pretreated alone, and the other group is added with 2% of the dry weight of corn stalks at the same time. 3 ·H 2 O; add ammonia hydrothermal pretreatment group to add 2% ammonia water of dry weight of corn stalks, and then adjust its moisture content to 80%; add tap water to the single hydrothermal group, and adjust its moisture content to 80%. Add raw materials and water into a glass container, stir evenly with a glass rod, and then place in a hydrothermal reactor for heating pretreatment. The pretreatment conditions set for corn straw pretreatment are: at 50°C, the pretreatment time is 1d, 2d, 3d; at 70°C, the pretreatment time is 1d, 2d; The pretreatment time is 5min, 10min, 20min, 30min, 150℃, the pretreatment time is 5min, 10min, 20min and 200℃, the pretreatment time is 5min, 10min....
Embodiment 2
[0084] (1) Hydrothermal pretreatment
[0085] Weigh 20g of rice husk and calculate it based on raw material TS. The pretreatment experiment is divided into two groups, one group is hydrothermally pretreated alone, and the other group is added with 2% NH of corn stalk dry weight at the same time. 3 ·H 2 O; add ammonia hydrothermal pretreatment group to add 2% of the dry weight of rice husk ammonia water, and then adjust its moisture content to 80%; add tap water to the separate hydrothermal group, and adjust its moisture content to 80%. Add raw materials and water into a glass container, stir evenly with a glass rod, and then place in a hydrothermal reactor for heating pretreatment. The pretreatment conditions set for rice husk pretreatment are: at 50°C, the pretreatment time is 1d, 3d, at 70°C, the pretreatment time is 1d, 3d, at 90°C, the pretreatment time is 2h, 4h, and at 100°C The pretreatment time is 5min, 30min, 150°C, 5min, 10min, and 200°C, 5min, 10min. Three groups...
Embodiment 3
[0105] (1) Hydrothermal pretreatment
[0106] Weigh 20g of cow dung and calculate it based on raw material TS. The pretreatment experiment is hydrothermal pretreatment alone. Tap water is added to the cow dung to adjust its moisture content to 80%. Add raw materials and water into a glass container, stir evenly with a glass rod, and then place in a hydrothermal reactor for heating pretreatment. The pretreatment conditions set for cow dung pretreatment are: pretreatment time at 50°C is 1d, 3d, pretreatment time at 70°C is 1d, 3d, pretreatment time at 90°C is 2h, 4h, pretreatment at 100°C The pretreatment time is 5min, 30min, 150°C, 5min, 10min, and 200°C, 5min, 10min. Three groups of parallels were set under each pretreatment condition.
[0107] After the pretreatment, use water cooling and air cooling to cool down. After the cooling is completed, the cow dung is taken out, and the properties of pH, reducing sugar, VFAs, etc. after pretreatment and whether there are toxic and...
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