Microbiological cell device and municipal sludge disposal method

A technology for microbial batteries and municipal sludge, which is applied in sludge treatment, biochemical fuel cells, water/sludge/sewage treatment, etc., can solve the problems of unfavorable operation mode, high sludge cost, structural defects, etc., and achieve COD removal. Good effect, easy to expand and enlarge, simple structure effect

Inactive Publication Date: 2009-12-23
广州福之源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] An object of the present invention is to overcome the shortcomings of existing microbial fuel cell structure defects and operating modes that

Method used

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  • Microbiological cell device and municipal sludge disposal method
  • Microbiological cell device and municipal sludge disposal method
  • Microbiological cell device and municipal sludge disposal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Disposal of Municipal Sludge Using Microbial Fuel Cells

[0041] The invention provides a kind of disposal method of municipal sludge, comprising the following steps:

[0042] (1) Set an open container, install the anode of the microbial fuel cell at the bottom of the container; place the municipal sludge in the microbial fuel cell container for natural settlement to produce a supernatant, and set an isolation material to isolate the sludge from the supernatant ;

[0043] The cathode of the microbial fuel cell is installed on the supernatant, one side of the cathode is in contact with the surface of the supernatant, and the catalyst-coated side of the cathode is in contact with the air;

[0044] (2) Connect the anode and cathode of the microbial fuel cell with wires, connect the external circuit, and carry out the domestication of the electricity-producing microorganisms; after the anode microorganisms are domesticated, repeat the sludge disposal and electric...

Embodiment 2

[0055] Example 2 Sludge Microbial Fuel Cell Single Sludge Treatment and Electricity Production Effect Experiment

[0056] (1) Municipal sludge samples

[0057] The sludge used for the test was concentrated sludge from Beijing Gaobeidian Sewage Treatment Plant, which was recovered and stored in a refrigerator at 4°C. The physical and chemical properties of sludge are as follows: pH is 6.86; volatile organic matter content is about 49.5%; total carbon, 279.4 g / kg; total nitrogen, 27.6 g / kg.

[0058] (2) Construction of microbial fuel cells

[0059] as attached figure 1 As shown, a cuboid container of polyethylene material with a side length of 6 cm in cross section is adopted, and the total height of the container is 10 cm. Inject 144mL of sludge into the feed port below the container (conventional technology, not marked in the figure). The height of the sludge surface from the bottom of the battery is about 4cm, and a carbon felt with a projected area of ​​25cm (5×5cm) is us...

Embodiment 3

[0063] Example 3 Sludge Microbial Fuel Cell Single Sludge Treatment and Electricity Production Effect Experiment

[0064] (1) Sludge sample

[0065] The sludge used in the test was concentrated sludge from Guangzhou Liede Wastewater Treatment Plant, which was recovered and stored in a refrigerator at 4°C. The physical and chemical properties are as follows: pH is 6.69; volatile organic matter content is 45.2%; total carbon is 232.3 g / kg; total nitrogen is 28.2 g / kg. The moisture content of the tested sludge was 96.7%, and the COD was 29050mg / L.

[0066] (2) Construction of the battery

[0067] A polyethylene cuboid container with a side length of 6 cm is adopted, and the total height of the container is 10 cm. Inject 144mL of sludge from the inlet below. The height of the sludge surface from the bottom of the battery is 4cm, and the carbon felt with a projected area of ​​25cm (5×5cm) is used as the anode. It is placed in the sludge 2cm below the sludge surface and filled wi...

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Abstract

The invention discloses a microbiological cell device and a municipal sludge disposal method. A microbiological fuel cell comprises an anode chamber, a cathode chamber, an anode, a cathode and a conducting wire, wherein the anode chamber and the cathode chamber are isolated by isolation material, and the anode chamber is provided with a sludge inlet and outlet for feeding and discharging sludge; the anode is arranged at the bottom of the anode chamber and is buried by sludge; supernatant liquid generated after the sludge is settled enters into the cathode chamber, the lower surface of the cathode clings to the liquid level of the supernatant liquid, and the upper surface of the cathode coated with catalyst contacts with air; and the cathode and the anode are connected by the conducting wire to form a loop. The invention also provides a method for disposing sludge by utilizing the microbiological fuel cell. As a new way for disposing sludge, the invention can solve the defects of the prior sludge disposal technology and effectively expand the application field of the microbiological fuel cell, thereby adapting to the requirement of the current environment protection situation.

Description

technical field [0001] The invention belongs to the technical field of environment and new energy, and in particular relates to a microbial battery device and a method for using the device to treat urban sludge. Background technique [0002] Municipal sludge is the sediment inevitably produced in the process of urban sewage treatment. At present, the annual output of urban sludge in my country has reached 8 million tons of dry weight, and it is increasing at a rate of 10-15% per year. Most of these sludges are simply landfilled or discarded at will, which greatly offsets the environmental purification effect of sewage treatment plants and seriously restricts the healthy development of sewage treatment. The irregular disposal of sludge has become a new hidden danger in today's urban environment. How to properly dispose of these increasingly large and highly concentrated organic solid wastes is one of the most troublesome problems for sewage treatment plants. Generally speak...

Claims

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Application Information

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IPC IPC(8): C02F11/00H01M8/16
CPCY02E60/527Y02E60/50
Inventor 周顺桂卢娜庄莉王跃强
Owner 广州福之源环保科技有限公司
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