Pre-treatment method capable of improving anaerobic digestion biogas production efficiency of gramineous plants

A technology of gramineous plants and anaerobic digestion, which is applied in the field of improving the efficiency of anaerobic digestion of gramineous plant straws to produce gas, can solve the problems of extensive and single pretreatment methods, shorten the anaerobic digestion cycle, optimize utilization, and reduce economic costs Effect

Inactive Publication Date: 2016-11-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

However, the above-mentioned inventions are for anaerobic digestion after pretreatment of the whole crop stalks. Overall, the pretreatment method is relatively extensive and single. Therefore, the existing straw pretreatment method is improved to further make the straw anaerobic digestion to produce gas. It is still the pursuit and voice of researchers in this field to maximize the release of efficiency

Method used

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  • Pre-treatment method capable of improving anaerobic digestion biogas production efficiency of gramineous plants
  • Pre-treatment method capable of improving anaerobic digestion biogas production efficiency of gramineous plants

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Embodiment 1

[0026] In this embodiment, corn stalks are used as the treatment object, and the method of the present invention is used to pretreat the stalks, and a control experiment is carried out at the same time, and an anaerobic digestion experiment is carried out after the pretreatment:

[0027] 1. The complete corn stalks of 10 plants were selected to be air-dried naturally, then manually peeled off, sorted into four parts: leaves, stem bark, stem pith, and corn cobs, and crushed through a 40-mesh sieve with the whole plant control sample;

[0028] 2. Weigh the raw materials of each part of corn stalk respectively: 37.68g of stem bark, 38.65g of stem pith, 36.47g of leaves, 36.42g of corncobs, 36.96g of whole plant (both contain the same dry matter quality: 34.78g) in three parts each, Put it in a jar, and carry out three experimental groups: no treatment, 10% dilute hydrochloric acid immersion treatment and 10% ammonia water immersion treatment respectively. The solid-liquid ratio of...

Embodiment 2

[0039] Different parts of sorghum stalks were mechanically crushed and sieved in the same manner as in Example 1. Then the stem pith of the sorghum straw is treated with sulfuric acid, the leaves and the rest of the straw are treated with sodium hydroxide, and the stem bark is not treated. Anaerobic fermentation was performed after pretreatment, and compared with the anaerobic digestion of the whole plant without pretreatment, and the biogas production of anaerobic digestion after pretreatment of the whole plant with sulfuric acid and sodium hydroxide pretreatment.

[0040] The results show that, similar to the results shown in Example 1, after pretreatment of each part, anaerobic fermentation is performed to produce biogas, the biogas production is greatly increased, the fermentation cycle is shortened, and the economic benefit is obviously improved.

[0041] It should be noted that in the present invention, the acid treatment is exemplified by hydrochloric acid and sulfuric ...

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Abstract

The invention discloses a pre-treatment method capable of improving the anaerobic digestion biogas production efficiency of gramineous plants. The pre-treatment method comprises the following steps: separating a whole plant straw into a stem bark, stem pith, leaves and other parts of the straw; then carrying out acid treatment on the stem pith, carrying out alkali treatment on the leaves and the other parts of the straw and not treating the stem bark. The straw, which is pre-treated by the pre-treatment method disclosed by the invention, is subjected to anaerobic digestion to generate biogas; the period of the anaerobic digestion can be shortened and the economic cost is reduced; and meanwhile, the yield of biogas is increased and the optimized utilization of the straws is realized to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency resource utilization of biomass solid waste, and in particular relates to a method for improving the gas production efficiency of anaerobic digestion of gramineous plant straws. Background technique [0002] As a large agricultural country, our country produces more than 600 million tons of various crop straws annually, and is rich in straw resources. However, the comprehensive utilization rate of straw is low, and most of them are returned to the field or burned, which not only wastes resources, but also brings many social hazards. Corn stalks, as a main crop stalk, are abundant in northern my country and are a good renewable biomass resource. The use of anaerobic digestion technology to convert corn stalks into biogas with high calorific value has great development potential and utilization value, and can replace fossil energy to a certain extent. Therefore, the resource utilization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2201/00Y02E50/30
Inventor 陈灏步天达
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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