SU992569A1 - Process for producing methane - Google Patents

Description

() METHOD OF GETTING METHANE

one

The invention relates to microbial logical industry, namely, to a method for producing methane by methane fermentation, and can be used for the preparation of gaseous fuels.

It is known that hydrogen has a stimulating effect on the methanogenase process 1.

There is also known a method for producing methane by thermophilic methane-. fermentation of acetone-butyl bards in the presence of methanogenesis stimulants. Methanol, cobalt chloride, and acetic acid 2 are used as stimulators of methanogenesis.

However, this method is not characterized by a high methane yield.

The purpose of the invention is to increase the methane yield.

This goal is achieved by the fact that according to the method of producing methane by thermophilic methane gas

In the process of fermentation of acetone-butyl bards in the presence of methanogenesis stimulants in the process of fermentation, gaseous wastes of acetone-butyl production are passed through bard in a number of 25-30 bards per day.

The method is carried out as follows.

In the lower honor of the digester, acetone-butyl bard cooled to 60 ° C and acetone-butyl-fermented waste gas containing 88–89 hydrogen, carbon dioxide 9–11 and minor gaseous components stimulating the development of methane-generating microorganisms are continuously fed.

The feed gas mixture is a substrate that provides intensive development of methane-forming bacteria and bacteria, which, in turn, leads to an increase in the rate of fermentation and a further increase in the amount of emitted gas while improving its composition.

As a result of fermentation, get almost no carbon dioxide methane,.

Example 1 (control). The main raw material is acetone 1 bard of the following composition: Dry matter,% 1,93 Reducing agents,% 0, Volatile fatty acids,% 0.27 Nitrogen:

total,% Q, 0 protein,% 0.025 ammonia, mg

per 100 ml of 6.0 ash, I0, iti.

PH 5

Barda is cooled before and served continuously in the lower part of the digester with a volume of 1000 m with a transmission rate of 200 m per day. The fermentation temperature is 5-5 ° C. Under these conditions, for each cubic meter of fermented bards, 10 m of gas consisting of 70 of CH and 30 of the gas digester for gas 2600 are obtained. | total gas or 1400 m of methane.

PRI me R 2 (prototype). To obtain methane, acetone-butyl bard, enriched with methyl, exhaled alcohol and 1.0 v / v and cobalt chloride (10 g per 1 m barda) are used, fed continuously along with bard to the bottom of the methane tank with a volume of .1000 m. Transmission rate bards 200. In this case, for each cubic meter of fermented barda, 15 m of gas of composition is formed - methane 70%, carbon dioxide 30%. Metanthic performance

3000 m of gas per day or 2100 m of methane.

EXAMPLE 3 To obtain methane, acetone-butyl bard is used, fed to the bottom of the digester with a volume of 1000 m at a speed. .

This also introduces gaseous products of acetone-butyl fermentation, containing: hydrogen 88-89, carbon dioxide 10% and minor gaseous components, which stimulate its effect on the development of methane-generating organisms, in an amount of 12 thousand.

The capacity of the digester is 5,000 m of gas consisting of practically one methane.

Thus, the proposed method allows to increase the yield of methane by more than 2 times compared with the known method.

Claims (1)

1. Bonch-Osmolovska E.A. Methane formation by microorganism communities. Advances in Microbiology, vol. U, M., Nauka, 19792. USSR author's certificate No. 175182, cl. with 12 p 19L2, 1964.