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Sewage treatment method and device for synchronous desalination and organic matter removal

A technology of sewage treatment device and sewage treatment method, applied in water/sewage treatment, water/sludge/sewage treatment, separation method, etc., can solve the problems of unsustainable development, complex water reuse process and high energy consumption in operation , to achieve the effect of good adaptability, lower operating costs and high energy efficiency

Inactive Publication Date: 2019-03-01
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, it is indeed necessary to provide a sewage treatment method and device for synchronous desalination and organic matter removal, aiming at solving the problems of complex water reuse process, high energy consumption and unsustainable development

Method used

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  • Sewage treatment method and device for synchronous desalination and organic matter removal
  • Sewage treatment method and device for synchronous desalination and organic matter removal
  • Sewage treatment method and device for synchronous desalination and organic matter removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 Sewage treatment device 100 for synchronous desalination and organic matter removal

[0045] The desalination and decontamination chamber 12 is not filled with other materials, and the composite electrode 20 is composed of an activated carbon layer and a polyvinylidene fluoride ultrafiltration membrane, and is prepared by an in-situ composite method. see image 3 , the sewage treatment device 100 for synchronously desalting and removing organic matter has different retention properties for organic matter with different molecular weights.

[0046] The external power supply 30 is an electrochemical workstation (PGSTAT 128N, Metrohm Autolab.Netherlands).

Embodiment 2

[0047] Example 2 Different Applied Voltage Contrast Tests

[0048] Utilize the sewage treatment device 100 described in embodiment 1, process the model waste water containing salt and organic matter, described salt is divided into 1 g / L NaCl, and organic matter is 20 mg / L sodium alginate, 20 mg / L bovine serum albumin and 20 mg / L humus, the external power supply 30 applies voltages of 1.2 V and 2.0 V to one composite electrode 20, applies a voltage of 0 V to the other composite electrode 20, and the flow rate of the water outlet is 24 L h −1 m −2 . The external power supply 30 is turned off for 1 hour every 1 hour to desorb the ions adsorbed on the composite electrode 20, which is required by the experiment, and the water outlet is not closed during the desorption process. see Figure 4 , Figure 4 The medium conductivity changes with time. The falling stage is the desalination and organic matter removal stage, and the rising stage is the stage of turning off the external ...

Embodiment 3

[0049] Example 3 Synchronous desalination and removal of organic matter to treat actual wastewater

[0050] The sewage treatment device 100 described in Embodiment 1 is used to treat actual food processing wastewater. The TOC concentration of the experimental raw water was 450 ± 24 mg / L, and the conductivity was 1780 ± 90 μS / cm. The external power supply 30 applies a voltage of 2.0 V to one composite electrode 20, and a voltage of 0 V to the other composite electrode 20, and the water flow rate of the device is 106 ± 7 L h −1 m −2 .

[0051] see Figure 5 , the sewage treatment device 100 has a good desalination effect on actual food processing wastewater, the desalination rate is stable at about 50% under multi-cycle operation conditions, and the organic matter removal rate reaches 92%.

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Abstract

The invention discloses a sewage treatment device with a function of removing salt and organic substances synchronously. The sewage treatment device comprises a sewage treatment tank and two composite electrodes, wherein the two composite electrodes are arranged oppositely at an interval and used for being connected with an anode and a cathode of an external power supply respectively; the sewage treatment tank is divided into a salt removing and pollution cleaning chamber and clear water chambers by the two composite electrodes; the salt removing and pollution cleaning chamber is located between the composite electrodes; the clear water chambers are located on outer sides of the two composite electrodes; each composite electrode comprises an ultrafiltration (or microfiltration) membrane layer and a conductive material layer which are arranged in a laminated manner, and the ultrafiltration (or microfiltration) membrane layers of the two composite electrodes are arranged oppositely. The invention further discloses a sewage treatment method with the function of removing salt and organic substances synchronously.

Description

technical field [0001] The invention belongs to the field of sewage treatment and water resource reuse, and in particular relates to a sewage treatment method and device for synchronous desalination and organic matter removal. Background technique [0002] At present, both at home and abroad are facing serious water environment problems, mainly reflected in serious water pollution and water resource shortage, which have become one of the main factors restricting the sustainable development of economy and society. In order to alleviate the crisis of water environment, it is necessary to start from two perspectives: the development of water supply sources and the control of water pollution. Sewage recycling provides a new source of water resources while reducing sewage discharge. It has the characteristics of low cost, great potential, wide applicability and environmental friendliness. It is one of the practical and effective measures to solve the current water environment pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469
CPCC02F1/469
Inventor 梁帅黄霞左魁昌
Owner BEIJING FORESTRY UNIVERSITY