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A two-stage anaerobic fermentation device and a method for producing methane by anaerobic fermentation using the device

A technology for anaerobic fermentation and methane production, applied in fermentation, biochemical equipment and methods, gas production bioreactors, etc. The effect of methane production, fast start-up, and improved operating efficiency

Active Publication Date: 2015-08-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low biogas output, unstable operation in winter, high energy consumption for heating, difficult repair of pipeline blockage and low operating efficiency existing in domestic anaerobic fermentation technology, and provides a two-stage anaerobic fermentation device and its utilization Method for producing methane by anaerobic fermentation using the device

Method used

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  • A two-stage anaerobic fermentation device and a method for producing methane by anaerobic fermentation using the device
  • A two-stage anaerobic fermentation device and a method for producing methane by anaerobic fermentation using the device
  • A two-stage anaerobic fermentation device and a method for producing methane by anaerobic fermentation using the device

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specific Embodiment approach 1

[0023] Embodiment 1: In this embodiment, a two-stage anaerobic fermentation device is composed of an acidogenic fermentation section and a methanogenic section, the acidogenic fermentation section is the acidogenic fermentation reactor 21, and the methanogenic section is the methanogenic reactor 22;

[0024] Wherein, the feed inlet A1 is arranged at the lower part of one side of the acidogenic fermentation reactor 21, the redox electrode A2 is arranged at the upper part of the feed inlet A1, and the upper part of the other side of the acidogenic fermentation reactor 21 is provided with a discharge The mouth A7 and the lower part are equipped with a temperature-controlled temperature probe A9, and a temperature-controlled winding resistance wire A3 is wound around the periphery of the acid-producing fermentation reactor 21. The top cover plate of the acid-producing fermentation reactor 21 is connected to the tank body by a flange 4, and The top of the acidogenic fermentation rea...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the horizontal position of the discharge port A7 of the acidogenic fermentation reactor 21 is 20 cm higher than the horizontal position of the feed port B11 of the methanogenic reactor 22 . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028]Specific embodiment three: Utilize a kind of two-stage anaerobic fermentation device described in specific embodiment one to carry out the method for anaerobic fermentation methane, specifically carry out according to the following steps:

[0029] 1. The mixture of cow dung and straw is used as the fermentation raw material of the acid-producing fermentation stage, and the biogas slurry is used as the inoculum of the acid-producing fermentation stage. Acid phase fermentation raw materials;

[0030] 2. Introduce nitrogen into the two-stage anaerobic fermentation device described in Embodiment 1 for more than 30 minutes, and simultaneously add the acid-producing phase obtained in step 1 into the acid-producing fermentation reactor 21 for medium-temperature acclimatization. When the acid-producing phase When the pH of the fermentation raw material is 6.2 and the volume content of acetic acid reaches more than 70%, the fermentation raw material is added to the acidogenic fer...

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Abstract

The invention discloses a two-section anaerobic fermentation device and a method for producing methane by performing anaerobic fermentation by the device, relates to a control device for two-section anaerobic fermentation by biomass wastes, and aims at solving the problems of low biogas yield, instable running in winter, high heating energy consumption, difficulty for blocked pipeline repair and low running efficiency in a domestic anaerobic fermentation technology at present. The device comprises an acidogenic fermentation section and a methanogenic section. The method comprises the following steps: 1, preparing acidogenic fermentation materials; 2, fermenting for producing methane. According to the device and the method, organisms in an anaerobic process are separated, normal acclimation and culture are reduced, the starting time is shortened, the energy consumption is saved, and the running efficiency can be improved through biological and process regulation methods.

Description

technical field [0001] The invention relates to a two-stage anaerobic fermentation control device utilizing biomass waste. Background technique [0002] The technology of anaerobic digestion of biomass waste to produce biogas has been developed and applied for more than a century. However, due to the high cost of anaerobic digestion equipment and the high energy consumption of auxiliary equipment such as stirring and heating, good economic returns have not been achieved and widespread App promotion. my country has a deeper understanding and wider application of biogas technology mainly in the 1980s. Since then, important progress has been made in the research of anaerobic fermentation microbiology and fermentation technology. At present, biogas technologies that are relatively mature and popularized in southern my country, such as "one pond three reforms", "three-in-one", "four-in-one" and other ecological engineering models, have achieved good application results. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107C12P5/02C02F11/04
CPCC12M21/04C12M23/58C12M27/02C12M41/22C12M41/28C12P5/023Y02E50/30
Inventor 王世伟马放麻微微孟祥博黄金游空李树本
Owner HARBIN INST OF TECH
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