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Device and method for removing and recycling ammonia nitrogen in sewage by means of microbial fuel cell

A fuel cell and recycling device technology, applied in biochemical fuel cells, fuel cells, biological water/sewage treatment, etc., to achieve significant power generation efficiency and significant ammonia nitrogen removal efficiency.

Active Publication Date: 2014-11-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many methods can effectively remove ammonia nitrogen in theory, only a few methods can be used for the treatment of ammonia nitrogen-containing wastewater in engineering

Method used

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  • Device and method for removing and recycling ammonia nitrogen in sewage by means of microbial fuel cell
  • Device and method for removing and recycling ammonia nitrogen in sewage by means of microbial fuel cell
  • Device and method for removing and recycling ammonia nitrogen in sewage by means of microbial fuel cell

Examples

Experimental program
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Embodiment 1

[0034] Such as figure 1 As shown, a device for removing and recovering ammonia nitrogen in sewage by using microbial fuel cells in this embodiment is composed of a dual-chamber microbial fuel cell device 1 and an ammonia recovery device 2. The dual-chamber microbial fuel cell device includes an anode chamber 3 and a cathode chamber. Chamber 4, the anode chamber and the cathode chamber are separated by a cation exchange membrane 5, the anode chamber is provided with a battery anode liquid inlet 6 and an anode electrode 7, the cathode chamber is provided with an aeration device 8, an ammonia gas outlet 9 and a cathode electrode 10, and the anode electrode It is connected with the cathode electrode through an external circuit 11, and the external circuit is provided with a 50Ω load resistance 12 and a circuit switch 13; the ammonia gas recovery device is connected with the ammonia gas outlet of the cathode chamber through a pipeline 14.

[0035] The device of this embodiment is u...

Embodiment 2

[0037] Compared with Example 1, the device and method for removing and recovering ammonia nitrogen in sewage by using microbial fuel cells in this embodiment differs in that the external circuit is provided with a load resistance of 1000Ω, and the rest are identical.

Embodiment 3

[0039] A device for removing and recovering ammonia nitrogen in sewage by using microbial fuel cells in this embodiment is composed of a dual-chamber microbial fuel cell device and an ammonia gas recovery device. The dual-chamber microbial fuel cell device includes an anode chamber and a cathode chamber, and an anode chamber and a cathode chamber. The chamber is separated by a cation exchange membrane. The anode chamber is provided with the battery anode liquid inlet and the anode electrode. The cathode chamber is provided with the aeration device, the ammonia gas outlet and the cathode electrode. The anode electrode and the cathode electrode are connected by an external circuit, and the external circuit is provided with a 50Ω A load resistor and a circuit switch; the ammonia gas recovery device is connected with the ammonia gas outlet of the cathode chamber through pipelines. The material of the anode electrode and the cathode electrode is pretreated graphite felt, and the pre...

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Abstract

The invention belongs to the technical field of sewage processing, and discloses a device and method for removing and recycling ammonia nitrogen in sewage by means of a microbial fuel cell. A double-chamber microbial fuel cell system and an ammonia recycling device are built, an anode chamber is inoculated with domesticated electrogenesis mixed bacterium liquid, sodium acetate is added to serve as electron donors, and then phosphate buffered solutions with a PH value of 7.0 and nutrient solutions are added to the anode chamber until the anode chamber is full; the sewage containing the ammonia nitrogen is added to a cathode chamber, and air is led to the cathode chamber through an aeration device; H2SO4 of 0.1 mol*L<-1> is added to an ammonia recycling device, then the microbial fuel cell is started, and the ammonia nitrogen in the cathode chamber is converted into gaseous ammonia, removed from the sewage and recycled by the ammonia recycling device. The device and method are used for removing and recycling the ammonia nitrogen in the sewage and have good economic efficiency and environmental protection benefits.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a device and method for removing and recovering ammonia nitrogen in sewage by utilizing a microbial fuel cell. Background technique [0002] Wastewater treatment has always been an energy-intensive industry. According to statistics, my country's annual electricity consumption for wastewater treatment accounts for 1% of the country's total power generation, while that in developed countries such as the United States is as high as 3%. The removal of ammonia nitrogen from wastewater is an important part of wastewater treatment. With the increasing energy shortage, energy saving has become an urgent problem to be solved in the wastewater treatment industry. At present, the methods available for the removal of ammonia from wastewater usually include physical, chemical and biological treatment methods. Physical methods include reverse osmosis, distillation, ammo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/06H01M8/16C02F3/34
CPCC02F3/34C02F2101/16H01M8/16Y02E60/50
Inventor 冯春华杨晓双黄丽巧李晨晨吕志盛韦朝海
Owner SOUTH CHINA UNIV OF TECH
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