Method for simple production of high-quality biological methane

A biological methane and anaerobic biological technology, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of limiting the rate of biogas production and taking a long time to achieve stable gas production process and strong practicality. , the effect of rational use of resources

Inactive Publication Date: 2018-07-10
CHINA UNIV OF PETROLEUM (BEIJING)
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AI Technical Summary

Problems solved by technology

The first few stages of the traditional anaerobic fermentation gas production process take a long time, which limits the rate of biogas production

Method used

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  • Method for simple production of high-quality biological methane
  • Method for simple production of high-quality biological methane
  • Method for simple production of high-quality biological methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] (1) Activation of methanogenic archaea: In this example, the selected inoculum comes from a waste treatment plant in Changping District, Beijing. The measurement indicators are: TS is 6.23%±0.05, VS is 2.01%±0.03, and pH is 8.24±0.03 , The content of ammonia nitrogen is 4.4±0.4g / L. Add 3.5L biogas slurry containing inoculum to the CSTR reactor 5 with a volume of 6.5L, set the temperature (37°C) and the initial rotation speed (200rpm), and fill the CSTR reactor 5 with N through the console 4 2The air in the replacement device is filled at a rate of 2ml / min and the filling time is 24 hours to ensure a strict anaerobic environment. After the air is replaced, add 2.00g of microcrystalline cellulose as an activation substance and activate for 2-3 days. After the device no longer produces methane, the activation of methanogenic archaea is completed.

[0044] (2) Enrichment of hydrogenotrophic methanogenic archaea: after the activation of methanogenic archaea, the device no l...

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Abstract

The invention provides a method for production of high-quality biological methane by biotransformation. The method includes the following steps: firstly, hydrogen trophic methanogenic archaea is enriched in a reactor to show a good hydrogen-eating and methane-production capacity; and on the basis, the reactor is operated by a device console, so that the device can prepare the high-quality biological methane under conditions of only controlling the device gas intake quantity, gas intake ratio and rotating speed at medium temperature. Any other nutrient substances or nutrient solutions do not require to be added in the process. An idea is provided for making biological methane enter natural gas infrastructure.

Description

technical field [0001] The invention relates to a method for simply preparing high-quality biomethane. Background technique [0002] In recent decades, with the increasing energy demand and increasingly prominent environmental problems, the amount of traditional energy extraction and utilization methods have undergone tremendous changes, and the development and utilization of new renewable clean energy has gradually attracted people's attention. [0003] Biomass energy is a clean and renewable energy, which can be converted into biogas by anaerobic fermentation technology, which includes 50% to 70% methane, 30% to 50% carbon dioxide and a small amount of other gaseous impurities. [0004] The insufficient purity of methane in biogas will lead to its low energy density and cannot enter the national natural gas pipeline network facilities. At present, there are three methods to reduce the carbon dioxide content in biogas produced by anaerobic fermentation: 1. Use follow-up te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12R1/01
CPCC12P5/023Y02E50/30
Inventor 江皓郝文川丁江涛李叶青徐泉周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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