Three-stage coupling continuous enhanced hydrogen production method

Through the three-stage coupling continuous strengthening of hydrogen production method, combined with dark fermentation, light fermentation and continuous cultivation of microbial electrolytic cells, the problems of volatile organic acid inhibition and kitchen waste treatment pollution in biological hydrogen production technology are solved, and efficient and low-cost hydrogen production is achieved.

CN119685409APending Publication Date: 2025-03-25JIANGSU UNIV
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Patent Information

Application Number
CN202510023057.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In the existing biological hydrogen production technology, the accumulation of volatile organic acids during anaerobic dark fermentation will inhibit the activity of hydrogen-producing bacteria, resulting in insufficient hydrogen production rate and amount. At the same time, there is environmental pollution problem in the treatment method of kitchen waste.

Method used

The three-stage coupling continuous strengthening hydrogen production method is adopted to achieve efficient hydrogen production through continuous cultivation of dark fermentation tanks, light fermentation tanks and microbial electrolytic cells. The method includes enzymatic saccharification treatment to degrade macromolecular organics, enrichment and expansion of photosynthetic bacteria, and the use of microbial electrolytic cells to thoroughly oxidize residual organics.

Benefits of technology

It has achieved low cost, short fermentation time, complete process and high yield, solved the problem of inhibiting hydrogen-producing bacteria by volatile organic acids, and improved the utilization rate of kitchen waste substrates and reduced environmental pollution.

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Abstract

The invention discloses a three-stage coupling continuous enhanced hydrogen production method. The method comprises the following steps: step 1, preparing an oxygen-free environment; step 2, enrichment and propagation of hydrogenogens; step 3, enrichment and propagation of photosynthetic bacteria; step 4, performing enzymolysis saccharification on the kitchen garbage; 5, carrying out anaerobic dark fermentation to produce hydrogen; step 6, carrying out anaerobic light fermentation to produce hydrogen; and 7, continuously culturing to produce hydrogen. According to the continuous culture principle, hydrogen is continuously and efficiently produced through the dark fermentation tank, the light fermentation tank and the microbial electrolysis cell at the same time, and the method has the advantages of low cost, short fermentation time, complete process and high yield. And when the hydrogen production rate of dark fermentation begins to decrease, the substrate is continuously circulated, and the volatile organic acid generated by terminal metabolism of dark fermentation is consumed by light fermentation, so that the feedback inhibition effect of the volatile organic acid on hydrogenogens is effectively solved. The utilization range of the substrate of the microbial electrolysis cell is wide, thorough oxidation of residual organic matters is realized under the assistance of electricity-producing microorganisms, and the problem of incomplete dark-light coupling anaerobic fermentation can be effectively solved.
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