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Method of disposing kitchen waste and recovering electric power with air cathode microbial fuel cell

An air cathode and fuel cell technology, applied in biochemical fuel cells and other directions, can solve problems such as low energy utilization rate and secondary pollution, and achieve the effects of low processing cost, high economic efficiency, and stable and good power generation effect.

Active Publication Date: 2013-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low energy utilization rate and easy to cause secondary pollution in the existing kitchen waste treatment method, and to provide a method for recovering electric energy from kitchen waste treated by air cathode microbial fuel cells

Method used

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  • Method of disposing kitchen waste and recovering electric power with air cathode microbial fuel cell

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specific Embodiment approach 1

[0018] Specific implementation mode one: combined with figure 1 The specific implementation is further explained: the method for the air cathode microbial fuel cell in this embodiment to treat kitchen waste and recycle electric energy is implemented according to the following steps:

[0019] 1. Shake and mix the carbon powder and PTFE (polytetrafluoroethylene) with a volume concentration of 35% to 45%, apply it on one side of the carbon cloth, dry it at room temperature for 10 to 15 minutes, and place it in a muffle furnace. Heat treatment at ~400°C for 15-30 minutes, take it out and cool it at room temperature for 10-15 minutes to obtain the treated carbon cloth;

[0020] 2. Apply PTFE with a volume concentration of 55% to 65% on the side of the treated carbon cloth coated with PTFE, cool it at room temperature for 10 to 15 minutes, then place it in a muffle furnace, and heat it at 350 to 400°C Treat for 15-30 minutes, take out and cool at room temperature for 10-15 minutes;...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that every 6cm in step three 2 The amount of raw materials used in the platinum-carbon catalyst coated on the carbon cloth cathode is 15 mg of platinum-carbon powder, 12.48 μL of deionized water, 100 μL of Nafion and 50 μL of isopropanol. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the diameter of the cross-section of the cylindrical carbon brush anode in step 4 is 2.5 cm. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method of disposing kitchen waste and recovering electric power with an air cathode microbial fuel cell, and relates to the method of using the microbial fuel cell to dispose the kitchen waste and recover electric power. The method is used for solving the problems that the existing disposing method of the kitchen waste is low in energy utilization rate, and triggers a secondary pollution easily. The method includes that : firstly, carbon powder is evenly mixed with a polytetrafluoroethylene (PTFE), and the mixture is daubed on a carbon cloth which is heated in a muffle furnace; secondly, high-concentration PTFE is coated on the cloth to heat again; thirdly, then platinum-carbon catalyst is daubed, and a platinized carbon cloth cathode is acquired; fourthly, a carbon brush anode is in preparation; fifthly, the carbon brush anode, a resistance and the air cathode are in connection through a wire, and a cell reactor is assembled; sixth, leachate of food is pretreated; seventh, phosphate buffered saline (PBS) buffer solution is in preparation, and the leachate is diluted; eighth, the leachate is diluted to be neutral; ninth, reactor water is injected into a reactor to dispose the kitchen waste and recover the electric power. The efficiency of disposing the kitchen waste is good, and chemical oxygen demand (COD) removal rate reaches to 86.4%. The method is mainly used for the disposing and utilization of the kitchen waste.

Description

technical field [0001] The invention relates to a method for treating kitchen waste and recovering energy by utilizing a microbial fuel cell. Background technique [0002] The annual output of kitchen waste in my country exceeds 60 million tons, and cities such as Beijing and Shanghai produce more than 1,000 tons of food waste per day. At present, food waste is mainly sent to landfills for treatment. However, landfills occupy a large area and have poor treatment effects. Landfills are prone to produce high-concentration leachate that pollutes soil and water, causing serious secondary pollution. secondary pollution. In addition, landfills easily produce methane, carbon dioxide and other greenhouse gases, which affect the global climate and environment. In addition, the stench produced in the process will affect people's living environment. Traditional landfill treatment is costly and ineffective. According to statistics, the United States invests more than 25 billion U.S. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16
CPCY02E60/50
Inventor 邢德峰唐宇贾建娜吴迪
Owner HARBIN INST OF TECH
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