There is a kind of bacteria can "eat" coal "spit" gas

In December 2018 06, 08:14 source: Science Daily
 
Original title: one kind of bacteria can "eat" coal "spit" gas

State Key Laboratory of Shanxi Coal Group has a total production of coal and coal seam gas, there is a scientific research team is a world-class scientific research project "coal geological mining research of microbial degradation of fluidization". Science and Technology Daily reporter recently walked into the laboratory, to experience the wonderful and mysterious micro world.

The age of the earth and ancient microbes

Into the bright and spacious laboratory experiment table filled with all kinds of vessels, the technical staff to observe and record looked intently, strict in demands operation. The young engineer Liu Jian and Chen Linyong are doing experiments with the tacit understanding, the Taiwan they have a bacteria culture bottle, black coal particles immersed in nutrient solution. Liu Jian said: "this is the" eat "coal gas production test." I saw the opening of the pipe "toot toot" continuous bubbles, the bubbles to collect another bottle, the bottle in a match, gas can be ignited.

"This is the methane gas, which is commonly known as the" gas ", Chen Linyong," we have in the nutrient solution were cultivated 'methanogens', this bacteria can digest coal and gas." Chen Linyong said that methanogens is an ancient microorganism, it can be said that the age and the size of the earth is almost. Liu Jian and Chen Linyong, from their original coal seam extraction of such bacteria, and then continue the screening, the first half of this year has been selected 6 strains of fungi, 1 strains of bacteria.

The goal of their research is selected, optimization of microbial flora, making them more quickly "eat" "spit" coal gas. Chen Linyong said: "these bacteria are a division of labor groups, they carry out their duties in the metabolic process, put the coal molecules into small molecules, and then into the gas molecules."

Crack mechanism needs interdisciplinary collaboration

Liu Jian introduction, research that CBM 2 causes, one is "the earth pressure temperature causes", another is "biological origin". Different areas, different causes of these two kinds of coalbed gas ratio. Two kinds of genetic composition and proportion of modern technology can detect the specific data of coalbed gas.

Chen Linyong said: "because of the special environment, coal microbial vitality and metabolism is relatively slow, therefore, the process of microorganisms by coal gas is extremely long and complicated, our research is to analyse the mechanism for this process. The mechanism of crack is a world-class problem, many developed countries in related research."

Liu Jian said that if the breakthroughs, preferably by injection into the coal microbial flora, or can activate and promote nutrient solution flora metabolism in coal seam, can Everfount estate of coalbed gas. The result: one is completely into the coal gas; the second is can let many dry CBM re gas production; the third is the black coal green fundamentally.

In recent years, they have worked in several coal mine nutrient fluid injection experiment. "But did not achieve the desired effect." Liu Jian said, "human beings were cultivated microorganisms, in the process of enrichment optimization, but also" harm, loss "part of flora, which may affect the degradation of the coal, affect the gas production."

In Shanxi province coal gas joint fund, the team has established a set of methods of coal gasification biological acclimation exogenous bacteria, and puts forward the aerobic microbial pretreatment and anaerobic microorganism gasification in two steps to improve microbial coal gasification efficiency.

Liu Jian introduction, coal gas to coal chemical industry, scientific research, engineering geology, biology, nutrition and other interdisciplinary collaboration, team formation of professional talents, to form joint efforts. At present, their laboratory research basically on the same level with foreign countries, but on the basis of theoretical research, especially the microbial and coal mechanism as well as the gap between. (Wang Haibin)

(commissioning editor Wang Shaoshao and He Yingchun)

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