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Oxygen-limited microbial desalting tank and wastewater treatment method

A technology for wastewater treatment and microorganisms, which is applied in biological water/sewage treatment, electrochemical biological combined treatment, water treatment parameter control, etc., and can solve problems such as inability to effectively remove total nitrogen from wastewater

Pending Publication Date: 2020-10-23
南京神克隆水务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method adds an aeration device to the cathode of the microbial desalination tank to aerate the wastewater, it is essentially an aerobic biological treatment technology that cannot effectively remove the total nitrogen in the wastewater, and the concentrated water produced after desalination of the cathode effluent is still needs further processing

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  • Oxygen-limited microbial desalting tank and wastewater treatment method

Examples

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Effect test

Embodiment 1

[0021] Example 1: Oxygen-limited microbial desalination tank structure

[0022] Such as figure 1 As shown, the oxygen-limited microbial desalination tank includes an anode chamber 1, a desalination chamber 2, a cathode chamber 3, an anode electrode 4, a cathode electrode 5, an anion exchange membrane 6, a cation exchange membrane 7, an aeration device 8, and a dissolved oxygen detector 9. And external circuit 10.

[0023] The oxygen-restricted microbial desalination tank of the present invention is divided into three chambers, the middle chamber is the desalination chamber 2, the chambers on both sides are the anode chamber 1 and the cathode chamber 2, and the anode chamber 1 and the desalination chamber 2 are composed of an anion exchange membrane 6. The cathode chamber 3 and the desalination chamber 3 are separated by a cation exchange membrane 7. The anode chamber 1 is provided with an anode electrode 4. In this embodiment, the anode electrode 4 is a carbon brush, and the cathod...

Embodiment 2

[0026] Example 2: Method for denitrifying and desalinating wastewater by using the oxygen-limited microbial desalination pond of Example 1

[0027] Source of wastewater: Landfill leachate from a landfill in Beijing, COD 3460mg / L, BOD 1799mg / L, BOD / COD=0.52.

[0028] Sources of anaerobic sludge and sludge containing ammonia oxidizing bacteria: the anaerobic sludge in the present invention can be selected from the sludge in the sewage anaerobic treatment unit of any sewage treatment plant or the sludge in the sludge anaerobic digestion reaction device , The sludge containing ammonia oxidizing bacteria can be selected from the sludge in the aerobic treatment unit of any sewage treatment plant. The two types of sludge in this example were from the sludge anaerobic digestion reactor and aerobic tank of a municipal sewage treatment plant in Wuxi City, Jiangsu Province, and the sludge concentrations were 77.0 g / L and 3.2 g / L, respectively.

[0029] The source of the sludge containing anamm...

Embodiment 3

[0034] Example 3: Method for denitrifying and desalinating wastewater by using the oxygen-limited microbial desalination tank of Example 1 Wastewater source: the same as Example 2.

[0035] Sources of anaerobic sludge and sludge containing ammonia oxidizing bacteria: the same as in Example 2.

[0036] Source of sludge containing anammox bacteria: the same as in Example 2.

[0037] Step 1: Add 200 mL of landfill leachate to anode compartment 1 as anode feed water; add 10.0 g / L sodium chloride solution 200 mL to desalination compartment 2 as desalination compartment feed water; add waste treated by anode compartment 1 to cathode compartment 3 The supernatant of the leachate (at the first start-up, 200 mL of landfill leachate that has not been treated in the anode compartment 1 is directly added to the cathode compartment 3) as the cathode feed water.

[0038] Step 2: Inoculate 1.5mL of anaerobic sludge with a anaerobic sludge concentration of 77.0g / L in anode compartment 1, and inoculat...

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Abstract

The invention discloses an oxygen-limited microbial desalting tank and a wastewater treatment method. The oxygen-limited microbial desalting tank comprises an anode chamber, a desalination chamber, acathode chamber, an anode electrode, a cathode electrode, an anion exchange membrane, a cation exchange membrane, an aeration device, a dissolved oxygen detector and an external circuit. The wastewater treatment method comprises the following steps: adding high-nitrogen and biochemical wastewater into the anode chamber; adding high-salinity wastewater or seawater into the desalination chamber; adding effluent from the anode chamber into the cathode chamber; inoculating anaerobic sludge in the anode chamber, and inoculating sludge containing ammonia oxidizing bacteria and sludge containing anaerobic ammonia oxidizing bacteria in the cathode chamber; and starting the cathode chamber aeration device. By adopting the oxygen-limited microbial desalting tank disclosed by the invention, the triple effects of organic matter degradation, denitrification and desalting of wastewater can be simultaneously realized.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and specifically relates to an oxygen-limited microbial desalination tank and a wastewater treatment method. Background technique [0002] Microbial desalination tank (MDC) is developed on the basis of microbial fuel cell (MFC). The principle is to replace the proton exchange membrane of the MFC with a pair of anion and cation exchange membranes, forming a desalination chamber between the anion and cation exchange membranes. Organic matter as fuel is oxidized by microorganisms in the anaerobic anode chamber, and the generated electrons reach the cathode chamber through the external circuit, and a potential difference is generated between the anode and the cathode, thereby forming an electric field, pushing the anions and cations in the desalination chamber to pass through the anions and cations. The cation exchange membranes move directionally to the anode compartment and the cathode compartment r...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/30C02F3/34C02F101/16C02F101/30C02F103/06
CPCC02F3/005C02F3/34C02F3/30C02F2101/30C02F2101/16C02F2209/08C02F2103/06C02F2209/16
Inventor 田伟汉江双双余雷钟军
Owner 南京神克隆水务有限公司
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