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Method for producing hydrogen by alkalescent microbe electrolysis

A microbial electrolysis and microbial technology, applied in the direction of electrolysis process, electrolysis components, chemical instruments and methods, etc., can solve the problems of hydrogen production efficiency reduction, achieve the effect of improving utilization rate, suppressing methane production, and improving stability

Inactive Publication Date: 2014-01-22
ZHEJIANG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem of low hydrogen production efficiency due to methane produced by single-chamber microbial electrolytic hydrogen production, and provide an alkaline microbial electrolytic hydrogen production method that can effectively inhibit the growth of methanogenic bacteria without affecting the hydrogen production efficiency

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Embodiment Construction

[0025] The implementation of the present invention will be described in detail below through specific embodiments.

[0026] Alkaline microbial electrolytic cell hydrogen production method among the present invention, comprises steps:

[0027] (1) Start the electrolytic cell in microbial fuel cell mode:

[0028] First, uniformly mix the organic waste water and the nutrient solution A at a volume ratio of 1:1, then adjust the pH of the mixed solution to 9-12 with an alkaline solution, and add an organic substrate at a ratio of 1 g / liter to obtain a mixed solution B; Add the mixed solution B into the electrolytic cell, and connect a 1000 ohm resistor in the closed circuit of the system. When the voltage across the resistor is lower than 20mV, replace the solution in the electrolytic cell with the new mixed solution B; continue to replace the reactor solution until When the voltage across the resistor is greater than 500mV, the anode start is complete;

[0029] (2) Hydrogen prod...

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Abstract

The invention belongs to the technical field of microbe electrochemistry and aims to provide a method for producing hydrogen by alkalescent microbe electrolysis. The method comprises steps of: (1) starting an electrolytic bath under a microbiological fuel cell mode: accessing a resistor in a closed-loop of a system and replacing a solution in the electrolytic bath when a voltage is low; continuing to replace until voltages at two ends of the resistor are higher than 500mV to finish anode starting; (2) producing hydrogen under a microbe electrolytic bath mode: replacing a cathode in the started electrolytic bath with stainless steel net or foamed nickel, keeping solution in the whole electrolytic bath in a anaerobic state and applying 0.4-0.8 V voltage at two ends of the cathode and the anode by using direct-current power supply and realizing hydrogen production of the electrolytic bath at 20-35 DEG C. The invention can effectively inhibit generation of methane, realize long time continuous operation or multiple batch operation and generate gas with low methane content; the method has a low cost and can obtain high hydrogen generation rate; utilization rate of organic matter under an alkalescent environment is increased, and hydrogen generation stability of the system is increased.

Description

technical field [0001] The invention belongs to the technical field of microbial electrochemistry, and in particular relates to a hydrogen production method by alkaline microbial electrolysis. Background technique [0002] Hydrogen energy is a clean energy. The development of hydrogen energy is of great significance to future energy and the environment. At present, the production of hydrogen mainly comes from non-renewable materials such as petroleum and natural gas, and hydrogen is prepared by chemical means such as catalytic cracking and gasification. However, the hydrogen of the future must be obtained from renewable resources. Hydrogen production by electrolysis of water, hydrogen production by solar photolysis of water and hydrogen production by biological fermentation are sustainable hydrogen production methods. The electrolysis of water consumes a lot of energy and costs a lot. Solar photolysis of water has low efficiency and stability problems. The biological fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/02C25B11/06C02F1/461
CPCY02W10/37
Inventor 成少安
Owner ZHEJIANG UNIV
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