Process for denitrification and electricity generation by using single-chamber anaerobic ammonium oxidation sludge-microbial fuel cell device

An anaerobic ammonia oxidation and fuel cell technology, which is applied in the field of environmental engineering to achieve sustainable development, ensure high efficiency, and have wide application prospects.

Active Publication Date: 2019-04-16
DALIAN UNIV OF TECH
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Problems solved by technology

The single-chamber anammox sludge-microbial fuel cell device designed and constructed using this method effectively solves the problem of nitrate in the effluent of the anammox process, and obtains electrical energy output, and the generated current can also assist in strengthening Nitrogen Removal Effect of Anaerobic Ammonium Oxidation

Method used

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  • Process for denitrification and electricity generation by using single-chamber anaerobic ammonium oxidation sludge-microbial fuel cell device

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Embodiment

[0020] A single-chamber anammox sludge-microbial fuel cell device with a total nitrogen load of 0.23-1.74Kg N / m 3 d. The lower anode area is filled with anaerobic ammonium oxidation sludge loaded on activated carbon particles, separated from the upper cathode area by a stainless steel mesh, and the vertical distance between the stainless steel mesh and the bottom of the device is 9cm. The anode carbon felt is placed in the sludge, and the cathode catalytic electrode is fixed by a plate frame and placed parallel to the anode carbon felt, with a vertical distance of 1.5cm, and the length and width are the same as the anode carbon felt.

[0021] Cathodic catalytic electrode preparation method: (1) Burn the carbon fiber cloth at a high temperature of 550°C for 3 hours in the nitrogen flow of a vacuum tube furnace, soak it in concentrated sulfuric acid:concentrated hydrochloric acid = 3:1 for 18 hours, activate the surface of the carbon cloth, and separate them in ethanol, Ultraso...

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Abstract

The invention provides a process for denitrification and electricity generation by using a single-chamber anaerobic ammonium oxidation sludge-microbial fuel cell device, and belongs to the technical field of environmental engineering. The process is characterized in that anaerobic ammonium oxidation sludge in an anode region generates electrons by using ammonia nitrogen or the like as a fuel, theelectrons are transmitted to an anode surface, and are transmitted to a cathode through an external circuit and a resistor to form a current, and the cathode is driven to catalytically reduce the nitrate. The anode material is carbon felt and the cathode material is SnCu-Pd / carbon fiber cloth. The water is continuously fed from the bottom of the device and flows upward, and the water overflows outof the top of the device. The single chamber structure is simple, and the operation is easy. The effect and benefit of the present invention is that the single-chamber anaerobic ammonium oxidation sludge-microbial fuel cell device can selectively reduce the anaerobic ammonium oxidation by-product nitrate to nitrogen at the cathode, and the total nitrogen removal efficiency is increased by 10% to20% in comparison with the conventional anaerobic ammonium oxidation process; the voltage is simultaneously output; and the generated electric field can also be used to increase the metabolic activityof anammox bacteria.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to the research on anaerobic ammonium oxidation autotrophic denitrification process and microbial fuel cell production technology, in particular to the introduction of anammox sludge into the anode area of ​​a single-chamber microbial fuel cell to drive the cathode to reduce nitrate Research on simultaneous denitrification and power generation. Background technique [0002] Water is the source of life and one of the necessary material resources for human survival and development. With the development of global industry and agriculture and economic growth, a large amount of nitrogen-containing wastewater is discharged into water bodies, which destroys the balance of the ecosystem and poses serious hazards to human health. The problem of nitrogen pollution in water bodies is becoming increasingly serious. At the same time, my country's energy shortage problem has beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16C02F3/00C02F3/28
CPCC02F3/005C02F3/2846H01M8/16Y02E60/50
Inventor 张捍民葛程程
Owner DALIAN UNIV OF TECH
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