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Electrodialysis reversal and electrochemical wastewater treatment method of compound containing nitrogen

A technology of reverse electrodialysis and wastewater treatment, applied in the direction of osmosis/dialysis water/sewage treatment, chemical instruments and methods, neutralization water/sewage treatment, etc., can solve the problems that are not suitable for removing ionic substances

Inactive Publication Date: 2012-06-13
KEPCO ENG & CONSTR CO INC
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  • Abstract
  • Description
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Problems solved by technology

In particular, since flocculation-sedimentation devices and filtration devices in conventional wastewater treatment equipment are mainly designed to remove suspended solids, they are not suitable for removing ionic substances

Method used

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  • Electrodialysis reversal and electrochemical wastewater treatment method of compound containing nitrogen
  • Electrodialysis reversal and electrochemical wastewater treatment method of compound containing nitrogen
  • Electrodialysis reversal and electrochemical wastewater treatment method of compound containing nitrogen

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Embodiment Construction

[0033] According to an embodiment of the present invention, the influent may have chemical oxygen demand (COD) and total nitrogen (T-N) derived from ethanolamine (ETA).

[0034] The reverse electrodialysis (EDR) process can be performed in the pH range of 4 to 7.

[0035] The EDR process may include reuse of product water discharged from the EDR device as industrial water.

[0036] The EDR process can be operated by inversion.

[0037] The EDR process can be operated by out-of-specification product recycling (OSPR).

[0038] The EDR device can be equipped with a device for controlling the hydrogen ion concentration and / or the conductivity of the concentrated water.

[0039] The EDR process may include: after adding Cl-containing salt or seawater, the concentrated water flows into the EWT equipment.

[0040] The bipolar reactor can be used as the reactor of the EWT plant.

[0041] The spacing between the electrodes in the bipolar reactor can be 10 to 30 mm.

[0042] The current density of th...

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Abstract

Provided is a wastewater treatment method using an electrodialysis reversal (EDR)-electrochemical wastewater treatment (EWT) combined process, the method including: separating inflow wastewater which contains nitrogen compounds into product water and concentrated water using an EDR facility; and decomposing the concentrated water into target materials to be eliminated from the wastewater in an EWT facility. Provided is a wastewater treatment method for decomposing inflow water containing a nitrogen-containing compound into target materials to be eliminated using an EWT facility alone. According to the wastewater treatment method, product water which is flowed out from an EDR facility can be reused as raw water, and the method guarantees reliability and stability by simultaneously processing recalcitrant COD and T-N in the concentrated water. The wastewater treatment method efficiently removes recalcitrant COD and T-N, which are derived from ethanolamine (ETA), in wastewater produced in a power plant and an industrial facility using ETA as a pH-adjusting agent. EDR-EWT process can be easily combined with a common wastewater treatment and can efficiently and stably treat wastewater containing recalcitrant COD and T-N. Therefore, the method can actively satisfy the strengthening environmental regulation criteria.

Description

Technical field [0001] The present invention relates to a method of treating waste water, and more specifically to a method of separating nitrogen compound-containing waste water into product water and concentrated water by using reverse electrodialysis (EDR) to reuse the product water, and by Electrochemical Wastewater Treatment (EWT) treats concentrated water below the level of environmental regulations; and discharges water. Background technique [0002] figure 1 It is a schematic diagram for explaining the chemical wastewater treatment method of power plant according to the prior art. reference figure 1 The wastewater treatment equipment of traditional power plants discharges wastewater after flocculation, precipitation, filtration, adsorption and pH adjustment in accordance with the water quality protection law. The non-radioactive wastewater generated in the power plant is classified into oily wastewater 111 and chemical wastewater 121. The oily wastewater 111 is oily was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/44
CPCC02F1/469C02F1/56C02F2101/16C02F1/283C02F2001/46128C02F1/4693C02F1/5236C02F1/66B01D61/44C02F2209/06C02F2201/4613C02F2209/05B01D61/52C02F1/4672C02F2209/08
Inventor 朱洨荣金大福郑然旭边东华金永期文升铉延京镐
Owner KEPCO ENG & CONSTR CO INC
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