Method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure

A banana straw and alkali pretreatment technology, which is applied in fermentation, biological sludge treatment, waste fuel, etc., can solve the problems of difficult degradation of cellulose, many inhibitory factors, and system instability, so as to increase buffering and stability, Stability of the fermentation system and the effect of increasing biogas production

Active Publication Date: 2018-11-13
GUANGXI UNIV
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Problems solved by technology

[0005] Aiming at the disadvantages of the separate treatment of banana straw and pig manure, the present invention adopts a method of alkali pretreatment of banana straw and pig manure to promote anaerobic fermentation to produce biogas, so as to solve the problem of difficult degradation of cellulose existing in the separate treatment of banana straw and pig manure. Problems such as many inhibitory factors, system instability, and low gas production efficiency

Method used

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  • Method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure
  • Method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure
  • Method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure

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Effect test

Embodiment 1

[0025] The characteristics of the banana stalks in the alkali pretreatment stage of the present invention are shown in Table 1-1.

[0026] Table 1-1 Physical and chemical indicators of banana straw and inoculum

[0027]

[0028] Note: % in the table is mass percentage.

[0029] Weigh 150g (dry mass) of 4 groups of banana stalks respectively and place them in a 2000mL beaker, add water at a solid-to-liquid ratio of 1:9, and add 2%, 4%, 6%, 8% NaOH, mix evenly, seal with plastic film and let it stand at room temperature (28±2°C), measure the pH value of the treatment solution every day, measure the COD and VFA of each group of treatment solutions after 7 days, and rinse with a large amount of water Wash the banana straw until the eluent is neutral, measure the TS and VS of the straw, and dry it naturally for later use.

[0030] The above-mentioned NaOH pretreated banana stalks were subjected to anaerobic fermentation, and each treatment group was set with 2 repetitions, and...

Embodiment 2

[0038] The characteristics of the banana straw, pig manure matrix and inoculation mud in the mixed anaerobic fermentation stage of banana straw and pig manure of the present invention are shown in Table 2-1.

[0039] Table 2-1 Physical and chemical indicators of test raw materials

[0040]

[0041] (1) Effects of different ratios of manure and straw on mixed anaerobic fermentation of banana straw and pig manure

[0042] Banana stalks pretreated with NaOH were mixed with fresh pig manure for anaerobic fermentation. In each fermentation bottle, the total solid mass fraction of the fermentation feed liquid was 6% to 7%, and the inoculum concentration was 30% (the inoculum mass accounted for The percentage of the total mass of feed liquid), the quality of pig manure dry matter accounts for 0%, 20%, 35%, 50%, 65%, 80%, 100% of the total mass of banana stalk dry matter and pig manure dry matter, After all the materials are mixed evenly, the total mass of the fermentation feed li...

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Abstract

The invention discloses a method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure. The banana straw is subjected to alkali pretreatment, and then the banana straw after alkali pretreatment is mixed with the pig manure for anaerobic fermentation. The alkali pretreatment can greatly improve the raw material utilization rate and thegas production effect of the banana straw, shortens the start-up time of anaerobic fermentation, and makes the fermentation system more stable; then the banana straw after alkali pretreatment is mixedwith the pig manure for anaerobic fermentation, the total gas production amount can be further improved and the level of resource utilization of waste is improved. The problems of difficult degradation of cellulose, more inhibiting factors, unstable system and low gas production efficiency when the banana straw and the pig manure are treated separately are solved.

Description

technical field [0001] The invention belongs to the field of environmental protection technology / solid waste recycling and energy conversion, and specifically relates to a method for alkali pretreatment of banana straw and pig manure to promote anaerobic fermentation to produce biogas. Background technique [0002] my country is the second largest banana producer in the world, and the banana industry is a pillar industry in the tropical regions of my country. Since bananas are annual herbaceous plants, after the bananas are harvested, the mother plant needs to be cut off so that the daughter plants can grow smoothly. If the weight ratio of banana straw to banana is 1:2.4, the annual output of banana straw will exceed 28 million tons. Banana straw has the characteristics of heavy weight, high moisture content, and non-combustibility. At present, it is mainly returned to the field, piled up in the field and left to rot naturally or burned on the spot. This not only causes a w...

Claims

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Application Information

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IPC IPC(8): C12P5/02C02F11/04
CPCC02F11/04C12P5/023C12P2203/00Y02E50/30
Inventor 邓清华李桃张健冼萍黄宇钊
Owner GUANGXI UNIV
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