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A method of coupling electric field and microwave to strengthen seaweed anaerobic fermentation to produce methane

A technology for anaerobic fermentation and methane production, applied in fermentation, waste fuel and other directions, can solve problems such as environmental pollution and energy loss, and achieve the effects of improving operation stability, stabilizing gas production, and improving treatment efficiency

Active Publication Date: 2021-05-25
SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tail liquid after anaerobic fermentation of seaweed contains a large amount of small molecular organic substances, such as acetic acid, butyric acid and ethanol, etc., and direct discharge without treatment will cause energy loss and environmental pollution

Method used

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  • A method of coupling electric field and microwave to strengthen seaweed anaerobic fermentation to produce methane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method for producing methane by electric field and microwave coupling enhanced anaerobic fermentation of seaweed provided in this embodiment comprises the following steps:

[0034] (1) Seaweed (kelp, seaweed) is naturally air-dried and dried to constant weight, then crushed to 2mm, and water is added, and the solid-to-liquid ratio is 1:20.

[0035] (2) Then, the pretreatment of the mixed seaweed liquid is carried out by microwave pretreatment first, followed by heating pretreatment.

[0036] Microwave pretreatment adopts microwave radiation power of 850W, frequency of 2450MHz, and processing time of 85min.

[0037] Microwave pretreatment followed by heating pretreatment. The heat treatment temperature is 150°C, and the treatment time is 150min.

[0038] (3) Anaerobic fermentation stage. The seaweed is input into the anaerobic fermentation tank from the pretreatment tank, and the seaweed content in the anaerobic fermentation tank 7 is stable at 75% of the tank volum...

Embodiment 2

[0049] The method for producing methane by electric field and microwave coupling enhanced anaerobic fermentation of seaweed provided in this embodiment comprises the following steps:

[0050] (1) Seaweed (Sargassum, Enteromorpha) were naturally air-dried and dried to constant weight, then crushed to 40mm, and a phosphoric acid solution with a concentration of 0.5% by mass was added, and the mixing ratio was 1:15.

[0051] (2) Pretreatment of the mixed seaweed liquid is performed firstly by microwave pretreatment, and then by heating pretreatment.

[0052] The microwave pretreatment adopts microwave radiation power of 150W, frequency of 2450MH, and processing time of 10min.

[0053] Microwave pretreatment followed by heating pretreatment. The heat treatment temperature is 50°C, and the treatment time is 100min.

[0054] (3) Anaerobic fermentation stage. The seaweed is input from the pretreatment tank into the anaerobic fermentation tank, and the seaweed content in the fermen...

Embodiment 3

[0060] The method for producing methane by electric field and microwave coupling enhanced anaerobic fermentation of seaweed provided in this embodiment comprises the following steps:

[0061] (1) Seaweed (Sargassum) was naturally air-dried and dried to constant weight, then crushed to 25 mm, and sludge with a mass moisture content of 80% was added, and the mixing ratio was 1:10.

[0062] (2) Pretreatment of the mixed solution is carried out firstly by microwave pretreatment, and then by heating pretreatment. The microwave pretreatment adopts a microwave radiation power of 180W, a microwave frequency of 2450MHz, and a processing time of 100min.

[0063] Microwave pretreatment followed by heating pretreatment. The heat treatment temperature is 100°C, and the treatment time is 50 minutes.

[0064] (3) Anaerobic fermentation stage. The seaweed is input from the pretreatment tank into the anaerobic fermentation tank, and the seaweed content in the fermentation tank is stabilized...

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Abstract

The invention discloses a method for preparing methane by electric field and microwave coupling strengthening seaweed anaerobic fermentation, comprising the following steps: (1) selecting seaweed, adding water or other solutions after pretreatment, to obtain seaweed mixed liquid; (2) taking The seaweed mixture in step (1) is first subjected to microwave pretreatment, and then heat pretreatment; (3) the seaweed mixture through step (2) microwave pretreatment and heat pretreatment is subjected to direct current electric field and microwave Carry out anaerobic fermentation treatment, methane is produced during the anaerobic fermentation process, and the generated methane only needs to be collected. The method realizes high-efficiency anaerobic fermentation of seaweed to produce methane through the coupling action of a weak electric field and microwave, and the fermentation speed is fast and the system operation is efficient.

Description

technical field [0001] The invention belongs to the technical field of seaweed resource treatment, and in particular relates to a method for preparing methane by strengthening the anaerobic fermentation of seaweed by electric field and microwave coupling. Background technique [0002] The world's energy demand continues to grow, but a series of problems such as the excessive development and utilization of non-renewable fuels such as oil and coal have led to global problems such as energy shortage and environmental pollution. Under the new form of energy, countries around the world have begun to focus on the field of new energy and renewable energy. Biomass energy is the safest and most stable energy source. Countries around the world have formulated a series of encouraging and stimulating policies for the bioenergy industry. . As one of the effective ways to alleviate the three crises of "food, energy and environment" that our country is facing today, anaerobic fermentation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 徐姗楠夏禛王爽
Owner SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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