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MEDC (Microbial Electrolytic Desalting Cell) reactor device

A microbial electricity and reactor technology, which is used in biological water/sewage treatment, electrochemical biological combined treatment, water pollutants, etc.

Active Publication Date: 2018-11-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a microbial electrolysis desalination pool reactor (MEDC) device, which can recover resources such as nitrogen and phosphorus while ensuring that the sewage is treated, and can realize the stability of the pH of the electrode chamber without adding additional buffer solution, and overcome the traditional MEC Disadvantages of secondary pollution caused by adding buffer

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, a microbial electrolytic desalination tank reactor device includes an anode chamber 3 and a cathode chamber 4. One or more sets of ion exchange membrane pairs (IEMs membrane pairs) are arranged between the anode chamber 3 and the cathode chamber 4, and the anode A bio-carbon felt electrode 1 is provided in the chamber 3, and electricity-producing microorganisms 2 are provided in the anode chamber 3, such as figure 2 As shown in b, the cathode chamber 4 is provided with a stainless steel mesh electrode 6, the bio-carbon felt electrode 1 is connected to the stainless steel mesh electrode 6 through a wire 11 via an external voltage 12, and the anode chamber 3 and the cathode chamber 4 are connected by a silicone tube 10 to form a closed loop;

[0029] The ion exchange membrane membrane pair includes a cation exchange membrane (CEM) 7 close to the anode compartment 3 and an anion exchange membrane (AEM) 8 close to the cathode compartment 4. There are...

Embodiment 2

[0032] A microbial electrolytic desalination tank reactor device. The structure is shown in Example 1. The difference is that the ion exchange membrane membrane pair is a group, that is, a single membrane pair structure. The biological carbon felt in the biological carbon felt electrode 1 is used The anaerobic sludge of the sewage treatment plant and the bio-carbon felt inoculated with the effluent of mature microbial fuel cell in the laboratory. The product room 5 uses a silicone tube 10 to connect with a blue mouth bottle 9 to form a closed loop. One of the two adjacent ion exchange membranes The thickness of the intervening chamber is preferably 2 mm, the flow rate of the solution in the anode chamber 3 and the cathode chamber 4 is 5.02 mL / min, and the flow rate of the solution in the product chamber 5 is 6 mL / min.

[0033] In Example 2, the chemical oxygen demand (COD) removal effect of sewage is better under different voltages, all reaching 78% or more.

Embodiment 3

[0035] A microbial electrolytic desalination tank reactor device. The structure is shown in Example 1. The difference is that the external voltage is 0.8V. In Example 3, the removal rates of nitrogen and phosphorus are 25.8±15.9% and 19.1±6.5%, respectively. , The recovery rate is 3.4±2% and 21.5±3.5%, the batch experiment current peak value is 1.5±0.15mA, the power consumption is 31.65±0.22C, and the coulombic efficiency is 5.44±0.01%.

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Abstract

The invention relates to a MEDC (Microbial Electrolytic Desalting Cell) reactor device, and belongs to the technical field of biological treatment of wastewater. The MEDC reactor device comprises an anode chamber and a cathode chamber, wherein one group or multiple groups of ion exchange membrane pairs are arranged between the anode chamber and the cathode chamber; the anode chamber is internallyprovided with a biological carbon mat electrode; the anode chamber is provided with exoelectrogenic microbes; the cathode chamber is internally provided with a stainless steel mesh electrode; the biological carbon mat electrode is connected with the stainless steel mesh electrode through a guide wire and outer voltage; the anode chamber and the cathode chamber are connected by adopting a siliconetube so as to form a closed loop circuit; each ion exchange membrane pair comprises a cation exchange membrane and an anion exchange membrane; two adjacent ion exchange membranes in each ion exchangemembrane pair are separated by a chamber so as to form a product chamber; a closed loop circuit is formed by the product chamber by utilizing the silicone tube. According to the MEDC reactor device disclosed by the invention, resources such as nitrogen and phosphorus can be recycled from wastewater while the wastewater treatment is ensured, a buffer solution requires not to be additionally added,stability of pH (Potential of Hydrogen) of an electrode chamber can be realized, and the disadvantage of secondary pollution caused by adding the buffer solution in a traditional MEC (Microbial Electrolysis Cell) can be overcome.

Description

Technical field [0001] The invention relates to a microbial electrolysis desalination tank reactor device, belonging to the technical field of wastewater biological treatment. Background technique [0002] Due to the low utilization rate of the water environment by humans and lack of management, a large amount of sewage is generated. Excessive exploitation makes the shortage of fresh water resources and mineral resources such as phosphorus become the two main challenges facing the world. The realization of waste water treatment and reuse while achieving resource recovery is considered an important way to solve these two problems at the same time. However, the current urban sewage treatment energy consumption is very high. In the activated sludge treatment system, aeration is an indispensable process in the sewage treatment plant, accounting for the largest share of energy consumption, about 45% of the energy consumption of the sewage treatment plant -75%, while producing a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/28C02F3/34C02F101/10C02F101/16C02F101/30
CPCC02F3/005C02F3/2853C02F3/34C02F2101/105C02F2101/16C02F2101/30
Inventor 王允坤李佳欢刘汝东王曙光
Owner SHANDONG UNIV
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