Method for producing methane by means of fermentation with jet mixing technology

A technology of stirring fermentation and reflux stirring, which is applied in fermentation, biosynthesis, biological sludge treatment, etc., can solve the problems of poor contact between solid raw materials and fermentation bacterial mass, difficulty in fermentation to achieve the predetermined effect, and large power consumption of mechanical stirring, etc. Achieve the effect of small footprint, simple structure and low operating energy consumption

Inactive Publication Date: 2013-07-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fermentation tank is stirred by a mixer, a mechanical mixer is installed in the fermenter, and a transmission mechanism is installed in a closed container, so it is difficult to overhaul; especially in a large container, the mixing is not uniform, and the contact between the solid raw material and the fermentation bacteria group is poor, and the fermentation is difficult to achieve The expected effect, the gas production rate is not ideal; and the power consumption of mechanical stirring is large
Only the biogas reflux method is used for stirring, and the biogas compressor is required to press and send the reflux, which has the disadvantages of easy blockage of the reflux gas pipe and uneven stirring

Method used

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  • Method for producing methane by means of fermentation with jet mixing technology
  • Method for producing methane by means of fermentation with jet mixing technology
  • Method for producing methane by means of fermentation with jet mixing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1 with 20m 3 Take the jet reflux stirring biogas fermentation of the fermenter as an example.

[0032] Processing capacity: single or mixed livestock and poultry manure 400-800kg / day; fermentation TS: 5-8%; fermentation temperature: 33-37°C; fermentation period: 10-20 days; gas production: 20-40m 3 / day.

[0033] Breeding waste such as cow manure, pig manure, chicken manure, etc. pass through the coarse grid and the fine grid in turn, and use the fermentation liquid in the fermentation tank or tap water to prepare fermentation raw materials in the adjustment tank (10), and the feed concentration is controlled at 5 ~ 8%, sent into anaerobic fermentation tank (5) with feed pump (9). The raw material and the fermentation liquid at the bottom of the fermenter are pumped out by the circulation pump (8) and sent to the ejector (4), and the biogas is sucked in and fully mixed in the throat of the ejector. At the same time, heat the mixed fermented liquid with solar ...

Embodiment 2

[0034] Example 2 with 100m 3 Take the jet reflux stirring biogas fermentation of the secondary fermentation of the fermenter as an example.

[0035] Processing capacity: livestock and poultry manure, green feed, etc. 10-15t / day, fermentation TS: 6-10%; fermentation temperature: 33-37°C; fermentation period: 10-20 days; gas production 200-350m 3 / day.

[0036] The manure from the farm flows to the pretreatment tank by itself through the drainage ditch or pours the manure collected from a distance by a dung truck into the pretreatment tank, and uses biogas water or tap water after anaerobic fermentation to prepare in the regulating tank (10) to maintain water balance , the feed concentration is controlled at 6-10%, mechanical grilles are arranged in sequence in front of the regulating tank (10), and after deployment, the manure passes through a mechanical grill to remove grass or other sundries in the manure, and then enters the regulating tank. An upper water pump (9) is prov...

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Abstract

The invention relates to a method for producing methane by means of fermentation with a jet mixing technology, belonging to field of producing biomass energy by means of wastes recycling, and belonging to the field of producing the biomass energy by means of organic wastes recycling. The method comprises the following steps: adding livestock and animal excrements, village organic wastes, green fodder or organic water and the like into a fermentation tank for anaerobic digestion; pumping raw material and fermentation liquid at the bottom of a fermentation tank into an ejector by a stirring andreflowing mixing technology of the ejector; abundantly mixing the methane which is absorbed and stored at the top of the fermentation tank with the raw material liquid at a choke pipe of the ejector;evenly distributing the mixture on the cross section of the whole fermentation tank; and repeatedly updating and contacting a microbe contact surface in the raw material matrix and the fermentation liquid so as to improve the biochemical reaction speed, the carbon dioxide in the methane is preferably restored to generate the methane, and the production effect of the methane is improved. Accordingto the method, the technology is simple, the equipment is easy to process and to be and standardized, and the method is suitable for the recycling use of the organic solid waste material, the organicwaste water and the like in the urban and the village.

Description

technical field [0001] The invention relates to a method for producing methane by fermenting organic waste, belonging to the field of waste resource production of biomass energy. It belongs to the field of organic waste resource production of biomass energy. Background technique [0002] The use of organic waste to produce biogas by anaerobic fermentation can not only effectively solve the problem of environmental pollution, but also produce biogas biomass energy, which is one of the effective ways to solve energy and environmental problems. [0003] At present, the most commonly used anaerobic digestion device for biogas production from organic waste is a fully mixed fermenter. The biggest advantage of the fully mixed fermenter is that it is suitable for raw materials with high concentration and a large amount of suspended solids, and is not limited by the nature of the raw materials. The invention adopts a full-mix fermenter, and stirring plays an important role in the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/343Y02E50/30Y02P20/133Y02P20/59Y02W10/37
Inventor 宁平殷在飞瞿广飞熊向峰冯辉
Owner KUNMING UNIV OF SCI & TECH
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