A method for preparing biogas from irradiated pretreatment crop straw
A technology for crop straw and pretreatment, applied in waste fuel, fermentation and other directions, can solve problems such as raw material floating, and achieve the effect of saving energy, improving soil, and enhancing buffer capacity.
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Embodiment 1
[0021] Collect corn straw, cut into a small section of 2-4cm long after dryness; put the chipped corn stalk into the irradiation device, use it under natural room temperature conditions 60 CO-gamma ray irradiation, irradiation dose is 1200 kGy; the corn stalk with irradiation pretreatment is added to the reactor in the ratio of 1: 5 according to the volatile solid concentration (Vs), and then adding to corn stover. And the total weight of the total weight of the inoculum, mix, as a fermentation, control the total solids concentration of the fermentation body of 28%, anaerobic digestion in anaerobic digestion under 35 ° C-39 ° C, digestive time is 22 sky.
[0022]The methane generating rate of this embodiment reaches 250 l / kg vs, the gas gas is stable, and after the drying is dried, it is applied to the ground without "burning seedlings". In this example, the inoculum used is a normal gas-produced biogas tank of the biogas tank mixture, and the total solid material (TS) content o...
Embodiment 2
[0024] Collect rice straw, after natural drying, cut into a small section of 2-4CM long; put the cut rice straw into the irradiation device, use it under natural room temperature 60 The CO-γ ray irradiation, the irradiation dose is 600 kGy; the raw rice straw and inoculum after irradiation, adding the reactor in a ratio of 1: 2 in accordance with the volatile solid concentration (Vs), and then adds to rice straw and The total weight of the inoculum is 6% biomass carbon, mixing as a fermentation, controlling the total solid material (TS) concentration of the fermentation body to 25%, anaerobic digestive biogas, the digestive time is carried out under 35 ° C-39 ° C. 20 days.
[0025] The methane generating rate of this embodiment reaches 212 l / kg vs, the gas production is stable, and the anti-slag is applied to the ground without "burning seedlings". The inoculum used in this example is a normal gas-produced biogas tank, a mixture of biogasic tank, and is determined, and the total...
Embodiment 3
[0027] Collect corn and rice straw, cut into a small section of 2-4CM long after dryness; put the cut straw into the irradiation device in natural room temperature conditions 60 CO-gamma ray irradiation, irradiation dose is 900 kGy; the straw and inoculum after irradiation is added to the reactor in the ratio of 1: 3 according to the volatile solid concentration (Vs), and then adding to straw and The total weight of the inoculum is 8% of the biomass carbon, mixing as a fermentation body, and controls the total solid form (TS) concentration of the fermentation body to 20%, and anaerobic digestion is carried out at 35 ° C - 39 ° C, and the digestive time is 24 days.
[0028] The methane production rate of this embodiment reaches 205 l / kg vs, the gas gas is stable, and the anti-slag is applied to the ground without a "burning seedlings". The inoculum used in this example is the residue after anaerobic digestion of Example 1.
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