Dry-method ozone pretreatment pretreater capable of increasing straw enzymolysis saccharification ratio and method
A technology for pretreatment and saccharification rate, applied in the field of comprehensive utilization of crop straw resources, can solve the problems of lack of straw ozone pretreatment equipment, etc., and achieve the effects of improving storage stability, low equipment requirements, and improving straw enzymatic hydrolysis and saccharification efficiency.
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[0045] Example 1: Intermittent operation scheme of straw dry ozone pretreatment tower
[0046] Crush the straw according to certain requirements and adjust the moisture content of the straw powder (for details, refer to Examples 3, 4, and 5). The initial state of the pretreatment tower: the discharge port 10 is closed, and the bottom sieve plate 6 is in a horizontal state, which is called "closed". The hopper 1 is opened, and the middle sieve 6 and the upper sieve 6 are in a vertical state, which is called "open". Feed the pretreatment tower. After the material layer on the lower sieve plate 6 reaches the specified height, close the middle sieve plate 6 and continue feeding to the specified height, and so on to complete the feeding of the upper sieve plate 6. After the feeding is completed, close the feed hopper 1. Pass in the ozone gas flow with the specified concentration and flow rate, and monitor the ozone concentration discharged from the pretreatment tower. When the ozon...
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[0047] Example 2: Semi-continuous operation scheme of straw dry ozone pretreatment tower
[0048] Crush the straw according to certain requirements and adjust the moisture content of the straw powder (for details, refer to Examples 3, 4, and 5). The initial state and feeding operation of the pretreatment tower are the same as in Example 1. Pass in the ozone gas flow with the specified concentration and flow rate, and monitor the ozone concentration discharged from the pretreatment tower. When the concentration of ozone discharged from the pretreatment tower is not zero, the ozone supply is suspended, the discharge port 10 and the bottom screen 6 are opened, and the bottom screen 6 materials are discharged. Then close the bottom sieve plate 6 and the discharge port 10, and open the middle sieve plate 6 at the same time, so that the material originally located in the middle sieve plate 6 is placed on the bottom sieve plate 6. By analogy, the material originally located on the upp...
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[0049] Example 3: Dry Ozone Pretreatment Scheme 1 of Corn Straw
[0050] In this scheme, the pretreatment tower is operated batchwise. The corn stalks are coarsely crushed and passed through a 20-mesh sieve, and then finely crushed and passed through a 300-mesh sieve. Adjust the moisture content of straw powder to 60%. Treated under the conditions of ozone concentration 60mg / L and gas flow rate 5L / min. The final lignin degradation rate of the straw reaches 75%, and the cellulose enzymatic hydrolysis rate reaches 80% (10% for untreated straw).
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