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Photosynthesis microorganism fuel cell

A technology of photosynthetic microorganisms and fuel cells, applied in biochemical fuel cells, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of not being able to directly use convenient and easy-to-get solar energy, and achieve improved solar energy utilization, Good for growth and reproduction, simple battery structure

Inactive Publication Date: 2009-04-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the microorganisms used in the existing microbial fuel cells all use organic substances as substrates to transfer electrons, and cannot directly use convenient, easy-to-obtain, and sufficient-supply solar energy

Method used

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Embodiment 1

[0034] The microorganisms are Chlorella vulgaris, cultured from water samples obtained from the river, and separated by the water droplet separation method. The medium composition (1L) is as follows:

[0035] Table 1 Medium formula table (1L)

[0036]

[0037] Table 2 Trace element formula of culture medium (1L)

[0038]

[0039] The photosynthetic microbial fuel cell consists of two electrode chambers, the cathode and the anode, which are connected by a proton exchange membrane (Nation-17, Dupont). 1000ml solution, the physical surface area of ​​the anode plate is 75cm 2 , add anode buffer solution (Table 3) and the above-mentioned culture medium to the anode chamber, and add cathode buffer solution (Table 4) and potassium ferricyanide solution to the cathode chamber. All devices were placed in a light incubator for experiments. The growth temperature is 25-30°C, and the light intensity is 4.5×10 3 lx, the load resistance is determined to be 510Ω.

[0040] Table 3...

Embodiment 2

[0046] Photosynthetic bacteria (photosynthetic bacteria referred to as PSB) were isolated in Xiaoyuehe, Beijing, and the medium used for isolation was: organic matter 1.5-2g, (NH 4 ) 2 SO 4 1g, NaCl 2g, NaCO 3 5g,K 2 HPO 4 0.5g, MgSO 4 ·7H 2 O0.2g, distilled water 1000mL, pH 7.0, culture at 25-30°C under light. The isolated PSB has a Gram-negative reaction and is single-cell egg garden and spherical. The colony is rose red, moist and smooth, and the liquid culture of the bacteria is dark red. The bacterial suspension after liquid culture contains 2.6- 280 million / mL, identified as Rhodobacter sphaeroides, Rhodobacter palustris, Rhodobacter Capsulatus, Rhodospirillum rubrum and other strains.

[0047] The photosynthetic microbial fuel cell consists of two electrode chambers, the cathode and the anode, which are connected by a proton exchange membrane (Nation-117, Dupont). A vacuum pad is sandwiched between the proton exchange membrane and the bipolar chambers to keep ...

Embodiment 3

[0050] The photosynthetic microorganism is Spirulina, using Zarrouk's medium, adding 150mL of culture medium into a 250mL Erlenmeyer flask, and inoculating Spirulina in the logarithmic growth phase. To about 10, THZ-82 constant temperature shaker shaker 30 ℃, 24h d -1 Light shake flask culture.

[0051] The photosynthetic microbial fuel cell consists of two electrode chambers, the cathode and the anode, which are connected by a proton exchange membrane (Nation-117, Dupont). A vacuum pad is sandwiched between the proton exchange membrane and the bipolar chambers to keep it sealed. Each electrode chamber is filled with 1000ml solution. The physical surface area of ​​the anode plate is 120cm 2 , add anode buffer (Table 3) and Zarrouk's medium to the anode chamber, and add cathode buffer (Table 4) to the cathode chamber. All devices were placed in a light incubator for experiments. The growth temperature is 25-30°C, and the light intensity is 4.7×10 3 lx, the load resistance ...

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Abstract

A photosynthetic microbial fuel cell belongs to the technical field of microbial fuel cells. The photosynthetic microbial fuel cell is composed of two electrode chambers, namely, a cathode chamber and an anode chamber which are connected with each other by a proton exchange membrane. Each electrode chamber is filled with a fixed amount of anode chamber solution and a fixed amount of cathode chamber solution; photosynthetic microbes are adsorbed on the anode surface and degrade organic wastes and heavy metal wastewater, and simultaneously perform photosynthesis and release electrons and protons. The photosynthetic microbes transfer the electrons to the anode, and the protons enter the cathode by the proton exchange membrane and mix with oxygen in the air to generate water. The electron transfer between the electrodes produces voltage between the electrodes and supplies power to an external circuit. The photosynthetic microbial fuel cell has the advantages of no additional electron transfer medium, improving the oxygen content of the cathode surface without the external power, culturing the photosynthetic microbes (algae and photosynthetic bacteria) without additional nutrients and simultaneously generating electric energy by the anode, and simple cell structure. Adding wastewater to the anode not only can improve the electric energy, benefit the growth and reproduction of the photosynthetic microbes, save the cost, but also can relieve part of the pollution and produce the hydrogen and methane.

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells, and relates to a device capable of processing heavy metal / organic complex pollutant wastewater while obtaining electric energy, cultivating and harvesting photosynthetic microorganisms (algae, photosynthetic bacteria), and generating methane and hydrogen. Background technique [0002] Microbial Fuel Cell is a device that uses microorganisms (Microbe) as a catalyst to convert the chemical energy of fuels such as sugar and organic acids into electrical energy. This device has dual functions, that is, on the one hand, it can treat sewage, and on the other hand, it can also use the harmful waste in the sewage as a raw material to generate electricity. [0003] Due to the potential advantages of microbial fuel cells, people are very optimistic about its development prospects, but it is still far away to be used as a power source for actual production and life. The main reason is that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16C02F3/00
CPCY02E60/527Y02E60/50Y02P70/50Y02W10/37
Inventor 冯雅丽李浩然何辉郭龙
Owner UNIV OF SCI & TECH BEIJING
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