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Microbiological fuel cell and recycling method for cassava waste mash

A fuel cell and microorganism technology, which is applied in the fields of environmental protection and comprehensive utilization of resources, can solve the problems that it is difficult to effectively realize the recycling of cassava waste mash, the waste mash is not directly utilized, etc., so as to improve the effect of electricity production and improve the degradability. , the effect of mild reaction conditions

Inactive Publication Date: 2012-02-08
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the conventional sewage treatment process is difficult to effectively realize the resource utilization of cassava waste mash, especially the problem that the waste mash is not directly utilized in MFC, to provide a microbial fuel cell device and its use of waste mash method of generating electricity

Method used

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  • Microbiological fuel cell and recycling method for cassava waste mash
  • Microbiological fuel cell and recycling method for cassava waste mash
  • Microbiological fuel cell and recycling method for cassava waste mash

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specific Embodiment approach 1

[0011] Specific embodiment 1: Structure of microbial fuel cell

[0012] The microbial fuel cell used in this embodiment (see figure 1 ) Consists of anode chamber 1, cathode chamber 2, anode 3, graphite rod (or titanium wire) 4, anode wire 5, catalytic cathode 6, cathode wire 7, isolation material 8, silica gel gasket 9, cation exchange membrane 10, flange 11. Sealing cover 12, characterized in that the anode chamber 1 and cathode chamber 2 of the microbial fuel cell are both closed-head cubic structures and symmetrically distributed. The two electrode chambers are connected by flange 11, with cation exchange membrane 10 and silica gel in between. The gasket 9 and the isolation material 8 are all rectangular. The center of the gasket has a rectangular square hole. The side length of the hole is smaller than the side length of the membrane. The isolation material 8, the gasket 9, the membrane 10 are arranged in order to form the membrane module , Connected and fixed with flange 11 ...

specific Embodiment approach 2

[0018] Specific embodiment two: using microbial fuel cell to dispose of waste mash

[0019] In this embodiment, the microbial fuel cell device described in the first embodiment uses cassava waste mash as a substrate to generate electricity, so that the waste mash is practically feasible. In the following examples, some typical conditions are provided And the structure is used to illustrate the present invention, but does not limit the scope of the present invention. The specific steps are as follows:

[0020] (1) Solid-liquid separation of waste mash: use centrifugal separation to process cassava waste mash to obtain mash and supernatant at 5000~8000rpm for 8~10min, take the supernatant and use medium-speed qualitative filter paper for use;

[0021] (2) Ultrasonic-high-temperature anaerobic short-path fermentation combined treatment: Collect the mash in step 1 in a centrifuge tube, and use an ultrasonic cell disruptor to break it. The ultrasonic power density is 1~1.5W / ml, the freque...

specific Embodiment approach 3

[0025] Specific embodiment three: This embodiment is different from the ultrasonic processing method described in step 2 of the second embodiment in that the ultrasonic power density is 1.5 W / mL and the frequency is 20 kHz. The other embodiments are the same as the first and second specific embodiments.

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Abstract

The invention relates to a microbiological fuel cell and a method for generating electricity by cassava waste mash, which belong to the field of environment protection and the comprehensive utilization of resources and aim to solve the problem that the cassava waste mash has big processing difficulty and is difficult to recycle. The double-chamber microbiological fuel cell is adopted. The invention specifically discloses a processing method for generating electricity by the cassava waste mash, which comprises the following steps: 1. carrying out solid-liquid separation; 2. carrying out ultrasound-high-temperature anaerobic short-range fermentation combined treatment; 3. starting the microbiological fuel cell; and 4. processing solid substance and supernate in each step. In the method, when cassava waste mash stoste is adopted for generating electricity, the maximum power density of the cell reaches 285mW / m2, and the total chemical oxygen demand (COD) degradation efficiency is 42%. When the fermented supernate is used for generating electricity, the maximum power density is 670mW / m2, and the solubility COD degradation efficiency is 91%. As a new path for disposing the cassava waste mash, the method makes up the deficiency existing in the traditional waste mash processing technology, the electricity generation performance of the processed waste mash can be obviously improved, and the mode of generating electricity by biomass resources, such as the waste mash and the like, becomes feasible.

Description

Technical field [0001] The invention relates to a microbial fuel cell device that can recover electric energy while treating sewage, and belongs to the field of environmental protection and comprehensive resource utilization. Background technique [0002] Due to the global shortage of petrochemical energy and the harm to the environment in the process of use and mining, the search for renewable new energy has attracted global attention. Biomass is a kind of renewable energy with abundant reserves. As an alternative energy to fossil energy, its utilization can realize CO 2 Zero emissions, and low S and N content, can greatly reduce the greenhouse effect and environmental pollution. Organic wastewater is a kind of renewable energy biomass energy. The energy that can be recovered from organic wastewater currently mainly includes methane, hydrogen and electricity. Microbial fuel cell (MFC) is a new concept and device that can realize energy conversion. The use of microbial fuel cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16
CPCY02E60/50Y02P70/50
Inventor 全向春陶锟杨志峰
Owner BEIJING NORMAL UNIVERSITY
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