Biological hydrogen production method for improving hydrogen generation efficiency and stability

A technology of biological hydrogen production and stability, applied in the field of hydrogen production, can solve the problems of unstable and continuous hydrogen production, low hydrogen production efficiency of floc sludge, etc., and achieve the effect of strong resistance

Inactive Publication Date: 2005-07-06
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for biological hydrogen production by cultivating hydrogen-producing granular sludge to improve the efficiency and stability of hydrogen production, so as to solve the problems of low hydrogen production efficiency and low hydrogen production efficiency of floc sludge in the existing biological hydrogen production method using organic wastewater. Unstable continuous hydrogen production

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  • Biological hydrogen production method for improving hydrogen generation efficiency and stability

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Embodiment 1

[0010] Preparation of synthetic organic wastewater: Add 5g / L sucrose to tap water and add 374mg / L NH at the same time 4 HCO 3 , 97mg / LK 2 HPO 4 .3H 2 O, be mixed with organic waste water; The chemical oxygen demand concentration of organic waste water is 5.3g / L, and organic waste water pH is controlled at 7.0 by 2mol / L HCl and 2mol / L NaOH solution, puts into refrigerator and makes the temperature of organic waste water keep as 4°C.

[0011] First add methanogenic floc sludge in reactor 3, make the concentration of volatile suspended solids in the reactor be 6.3g / L, then organic waste water 1 enters reactor 3 by feed pump 2, the diameter of reactor 100mm, total The volume is 4.7L, of which the volume of the reaction zone is 2.1L. The anaerobic sludge inoculated in the reactor was anaerobic methanogenic floc sludge from the treatment of citric acid wastewater by Biobroad Chemical Co., Ltd., with an initial pH of 7.1. The flow rate of the feed pump is controlled so that the...

Embodiment 2

[0016] Preparation of synthetic organic wastewater: Add 7.5g / L sucrose to tap water and add 846mg / LNH at the same time 4 HCO 3 , 221mg / L K 2 HPO 4 .3H 2 O, formulated as organic wastewater; the chemical oxygen demand concentration of organic wastewater is 8g / L, and the pH of organic wastewater is controlled at 7.0 by 2mol / L HCl and 2mol / L NaOH solution, and the temperature of organic wastewater is kept at 4 in the refrigerator ℃.

[0017] First add anaerobic methanogenic floc sludge to the reactor 3, so that the concentration of volatile suspended solids in the reactor is 6.3g / L, and then the organic waste water 1 enters the reactor 3 through the feed pump 2, and the diameter of the reactor is 100mm , the total volume is 5.0L, of which the volume of the reaction zone is 2.6L. The anaerobic sludge inoculated in the reactor is anaerobic methanogenic floc sludge from the treatment of citric acid wastewater by Fengyuan Chemical Co., Ltd. The initial pH is 7.1, and the flow ra...

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Abstract

The invention discloses a biological hydrogen production method by culturing hydrogen production granular sludgesto to improve the hydrogen production efficiency and stability characterized in charging methane floccule sludges into the reactor to make the volatile suspended solid density be 3-7g/L in the reactor, controlling the flow rate of the organic wastewater flowing through the reactor to make the organic wastewater stay in the reactor for 5-20 hours; regulating the solution pH to 4.0-4.5 in the reactor, and the hydraulic loading to 15-30g/(L.d) from 2-5g(L.d) by increasing 0.1-0.5g(L.d) day by day; steadily operating till a hydrogen production granular sludge containing bultyric acid bacillus mainly and coccus forms in the reactor, then steadily operating till the volume of the hydrogen production granular sludges is 50-70% of the reacting area volume in the reactor. The invention solves the problems of low hydrogen production efficiency by floccule sludges, no steady and continuous hydrogen production existing in known biological hydrogen production method using organic wastewater, and the hydrogen production efficiency can be 1.22-1.37molH.

Description

Technical field: [0001] The invention belongs to the technical field of hydrogen production methods, and in particular relates to a biological hydrogen production method for improving hydrogen production efficiency and stability by cultivating hydrogen production granular sludge. Background technique: [0002] Netherlands "Bioresource Technology" (Bioresource Technology, 2002, volume 82, phase 1, pages 87-93) mentions a method of using a fully mixed reactor for biological hydrogen production from organic wastewater. The ratio of the amount of organic wastewater to the volume of the reactor (hydraulic load) is a fixed value, and the pH of the solution in the reactor is adjusted within the range of 5.5-6.0. In this case, the hydrogen-producing microorganisms and the acid-producing microorganisms cannot be agglomerated together, making hydrogen production Sludge can only exist in floc state; since the hydrogen-producing floc sludge has a diameter of 50-100μm, a density of 1.034...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00
Inventor 俞汉青穆杨郑家传
Owner UNIV OF SCI & TECH OF CHINA
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