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Method for improving anaerobic fermentation effect of synthesis gas by using carbon material

An anaerobic fermentation and carbon material technology, which is applied in the field of environmental protection and comprehensive resource utilization, can solve the problems of long start-up time, unstable anaerobic fermentation system, etc., and achieve accelerated degradation, accelerated electron transfer, degradation rate and methane production rate Enhanced effect

Active Publication Date: 2017-09-05
TONGJI UNIV
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  • Abstract
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Problems solved by technology

The domestication and proliferation of carboxydotrophic anaerobic microorganisms usually require a long start-up time, and the potential toxicity of carbon monoxide to microorganisms will also affect the metabolic process of functional bacteria and the cooperation with other microorganisms 【Sancho N S, Cimpoia R, Bruant G, et al al.Biomethanation of syngas using anaerobic sludge:Shift in the catabolic routes with the COpartial pressure increase[J].Frontiers in Microbiology,2016,7(147).] When these carboxydotrophic anaerobic microorganisms cannot degrade carbon monoxide in time, they will Lead to the instability of anaerobic fermentation system 【Mohammadi M, Najafpour G D, Younesi H, et al.Bioconversion of synthesis gas to second generation biofuels: A review[J].Renewable&Sustainable Energy Reviews,2011,15(9):4255-4273. 】

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  • Method for improving anaerobic fermentation effect of synthesis gas by using carbon material

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Embodiment 1

[0025] The structure of the anaerobic reactor adopted in this embodiment is as follows: figure 1 As mentioned above, it is a closed upflow anaerobic reactor. An air inlet 1 is provided at the bottom of the anaerobic reactor 6, an aeration head 2 is arranged above the air inlet 1, microorganisms 3 are filled inside the anaerobic reactor 6, and an air outlet 10 is provided at the top of the anaerobic reactor 6, An air bag 12 filled with syngas is arranged outside the anaerobic reactor 6, and the air bag 12 communicates with the air inlet 1 through the air inlet pipe, and a circulating pump 7 is arranged on the air inlet pipe, and a return pipe and an air outlet pipe are drawn from the air outlet 10 13. The return pipe communicates with the air bag 12, and the air outlet pipe 13 directly leads into the atmosphere.

[0026] After the syngas enters from the air inlet 1, it forms many bubbles 9 through the aeration head 2, and the bubbles 9 will pass through the microorganisms 3, a...

Embodiment 2

[0035] In this embodiment, the method for improving the anaerobic fermentation effect of syngas by using carbon materials, the steps are as follows:

[0036] (1) Anaerobic granular sludge was used as the starting agent, the dosage of sludge was 60g, and its TS and VS were 12% and 73% respectively. According to the quality of sludge VS: the quality of activated carbon is approximately equal to 1:1 adding 5 grams of activated carbon. The particle size of activated carbon is 75-150 microns, and the specific surface area is 644m 2 / g.

[0037] (2) The volume filling rate of activated carbon in the anaerobic reactor is 0.7%.

[0038] (3) if figure 1, in the closed up-flow anaerobic reactor, the syngas is pumped into the reactor from the air bag by the circulation pump, and finally returns to the same air bag, the reflux rate is 100%, and the gas in the air bag is replaced once every two days. The content of carbon monoxide in the synthesis gas in the reactor increases successiv...

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Abstract

The invention relates to a method for improving anaerobic fermentation of synthesis gas by using a carbon material. The method comprises the following steps: (1) adding the carbon material into an anaerobic reactor which takes anaerobic sludge as a starting microbial agent; (2) carrying out anaerobic fermentation in a way of aeration by taking the synthesis gas as a carbon source. Compared with the prior art, the method takes the carbon material as an additive, thus shortening the starting time of the anaerobic fermentation of the synthesis gas and obviously increasing a carbonic oxide degradation rate and a methane production rate. The method is simple to operate, and a device is simple. The synthesis gas and the carbon material are respectively used as the carbon source and the additive in a microbial anaerobic fermentation process, so that the biological refining and high-value utilization of waste can be realized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and resource comprehensive utilization, and in particular relates to a method for improving the anaerobic fermentation effect of syngas by using carbon materials. Background technique [0002] Lignocellulosic biomass raw materials (such as straw and wood) are not easy to be directly degraded by microorganisms and converted into biological raw materials. If it is directly burned, the combustion efficiency is low, and a large amount of air pollutants will be formed. Gasification or pyrolysis of them into syngas is one of the effective treatment methods to realize its resource utilization and energy utilization. Syngas can be directly used to provide electricity for industrial boilers, gas turbines or fuel cells, and can also be further converted into aldehydes, alcohols, acids, high-purity feedstock gases (such as methane, hydrogen) and other products through chemical or biological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 何品晶吕凡郭克俭章骅邵立明
Owner TONGJI UNIV
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