A high-efficiency straw fermentation method using straw silage to increase biogas production

A fermentation method and straw technology, applied in the field of high-efficiency straw fermentation, to achieve the effects of inhibiting activity, low-cost resource utilization, and enhancing fresh-keeping effect

Active Publication Date: 2022-05-20
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fermentation inhibitors can reduce the pH value of silage, inhibit the growth and reproduction of harmful bacteria, prevent mildew and rot, and reduce the loss of nutrients. However, existing fermentation inhibitors such as hydrochloric acid and nitrate can inhibit the subsequent anaerobic fermentation microorganisms. Therefore, finding the silage fermentation inhibitor suitable for subsequent anaerobic fermentation to produce biogas, improving the efficiency of straw to produce biogas, and finally realizing the efficient and low-cost resource utilization of straw is the key problem to be solved.

Method used

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  • A high-efficiency straw fermentation method using straw silage to increase biogas production

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Effect test

Embodiment 1

[0028] A high-efficiency straw fermentation method using straw silage to increase biogas production, the method comprising the following steps:

[0029] 1). Raw material processing: Harvest the whole plant corn stalks with ears at the wax ripening stage, and crush them to a length of 15mm to form straw scraps with a moisture content of 60%-70%;

[0030] 2). Soaking in silage additives: put straw scraps into 5% Fe 2 (SO4) 3 Solution mixing, Fe 2 (SO4) 3 The mass ratio of the solute to the green straw is 1:20, and the soaking time is 40 minutes in an ultrasonic cleaner; the ultrasonic cleaner is used to apply ultrasound while soaking; the ultrasonic frequency is 25kHz, and the power is 50w.

[0031] 3). Vacuum silage: put the soaked straw fragments and silage additive mixture into a sealed bag, and the sealed bag is evacuated by a vacuum pump to form an anaerobic environment, and stored in a vacuum airtight manner for 30 days to obtain silage straw. The composition of straw ...

Embodiment 2

[0036] A high-efficiency straw fermentation method using straw silage to increase biogas production, the method comprising the following steps:

[0037] 1). Raw material processing: Harvest the whole plant corn stalks with ears at the wax ripening stage, and crush them to 10mm to form straw scraps with a moisture content of 60%-70%;

[0038] 2). Soaking in silage additives: put the straw scraps into FeSO with a mass concentration of 10% 4 Solution mixing, FeSO 4 The mass ratio of the solute to the green straw is 1:100, and it is soaked in an ultrasonic cleaner for 90 minutes; while soaking, the ultrasonic cleaner is used to apply ultrasound; the ultrasonic frequency is 25kHz, and the power is 50w.

[0039] 3). Vacuum silage: Put the soaked straw fragments and silage additive mixture into a sealed container, and the sealed container is evacuated by a vacuum pump to form an anaerobic environment, and stored in a vacuum airtight manner for 60 days to obtain silage straw. The co...

Embodiment 3

[0044] A high-efficiency straw fermentation method using straw silage to increase biogas production, the method comprising the following steps:

[0045] 1). Raw material processing: Harvest the whole plant corn stalks with ears at the wax ripening stage and crush them to 5mm to form straw scraps with a moisture content of 60%-70%;

[0046] 2). Soaking of silage additives: put straw scraps into 15% ZnSO 4 Solution mixing, ZnSO 4 The mass ratio of the solute to the green straw is 1:200, and it is soaked in an ultrasonic cleaner for 120 minutes; ultrasonic cleaner is used to apply ultrasound while soaking; the ultrasonic frequency is 25kHz, and the power is 50w.

[0047] 3). Vacuum silage: Put the soaked straw fragments and the mixture of silage additives into a sealed container, and the sealed container is evacuated by a vacuum pump to form an anaerobic environment, and stored in a vacuum airtight manner for 90 days to obtain silage straw. The composition of straw after silage...

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Abstract

The invention relates to a high-efficiency straw fermentation method using straw silage to increase biogas production, which comprises the following steps: 1). Raw material processing: crushing freshly harvested green straw to form straw scraps; 2). Soaking the silage additive: soaking the straw Put the crushed material into the silage additive solution and soak for 30-120 minutes. The silage additive adopts a metal salt solution with a mass percentage concentration of 0.5%-20%. 3). Vacuum silage: put the soaked straw fragments and silage additive mixture into a sealed container, and the sealed container is evacuated by a vacuum pump to form an anaerobic environment, and stored in a vacuum airtight manner for 30-120 days to obtain silage straw; 4 ). Biogas production by anaerobic fermentation: the obtained silage straw is subjected to anaerobic fermentation, and the mass ratio of the anaerobic fermentation inoculum to the dry matter of the silage straw is 1:1‑50. The invention can effectively increase the amount of biogas produced by the straw, so as to finally realize resourceful utilization of the straw with high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of agricultural solid waste treatment and resource utilization, and is mainly applied to straw quality preservation and silage straw anaerobic fermentation to produce biogas, which is an efficient straw fermentation method that utilizes straw silage to increase biogas output. Background technique [0002] In my country, crop stalks are an important source of biomass energy. Except for some of them used as feed or directly burned for cooking by farmers, most of them are burned on site, which not only wastes resources but also pollutes the environment. Straw fermentation to produce biogas is an effective resource utilization method. However, the low efficiency of straw fermentation is mainly due to the complex structure of bioavailable components (cellulose, hemicellulose) inside the straw, and the barrier binding effect of lignin on cellulose and hemicellulose, which makes anaerobic microorganisms It is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C02F11/04A23K30/15A23K30/18
CPCY02E50/30
Inventor 张蕊刘凤国张殿新
Owner TIANJIN CHENGJIAN UNIV
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