An electrodialysis device for resource utilization of high-salt wastewater from mustard pickling

A technology of high-salt wastewater and electrodialysis, which is applied in the direction of food industry wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high use cost, high energy consumption, easy corrosion of equipment, etc., and improve the service life , Improve the removal efficiency and prolong the effect of time

Active Publication Date: 2022-02-11
CHONGQING RES ACAD OF ECO ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mustard high-salt wastewater is basically treated by traditional biological methods; (2) The current treatment technology of mustard wastewater is mainly for organic matter, ammonia nitrogen and total phosphorus, and the salt content is generally diluted to 2.0 wt% by adding water, so the local mustard mustard wastewater treatment Cognition needs to be improved; (3) Electrodialysis cannot avoid the disadvantages of high energy consumption and easy corrosion of equipment, resulting in high cost of use. At present, it is difficult for electrodialysis to have strong competitiveness in the treatment of pickled mustard wastewater

Method used

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  • An electrodialysis device for resource utilization of high-salt wastewater from mustard pickling
  • An electrodialysis device for resource utilization of high-salt wastewater from mustard pickling
  • An electrodialysis device for resource utilization of high-salt wastewater from mustard pickling

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Embodiment 1

[0031] Such as Figure 1-Figure 5 As shown, this embodiment provides an electrodialysis device for resource utilization of mustard pickled high-salt wastewater, including an electrodialysis reactor 1, and the electrodialysis reactor 1 includes two end plate assemblies and is located between the two end plate assemblies. The membrane stack, the end plate assembly includes an end plate 2 and an electrode plate 3 embedded in the end plate 2, an electrode column 4 is fixed on the end plate 2, and the electrode plate 3 is connected to an external power supply through the electrode column 4 respectively; The stack includes a bipolar membrane 3.1, a cationic membrane 6, an anionic membrane 5 and a bipolar membrane 3.1 arranged in sequence, and the above membranes are placed between the cathode and the anode, between two adjacent membranes, and between the electrode plate 3 and the membrane. Separated by the partition plate 7, the partition plate 7 is provided with a bent flow channel...

Embodiment 2

[0034] This embodiment is optimized and defined on the basis of the above-mentioned embodiment 1.

[0035] In order to realize the sealed connection of the structure, the end plate 2 and the partition plate 7 are provided with one-to-one corresponding bolt holes 10 in the circumferential direction, and the end plate assembly and the membrane stack are tightly connected by bolts passing through the bolt holes 10 .

Embodiment 3

[0037] This embodiment is optimized and defined on the basis of the above-mentioned embodiment 1.

[0038] In order to prolong the circulation time of the source water in the electrodialysis reactor 1, the flow channel 8 has a "bow"-shaped structure, and the partition plate 7 at the "bow"-shaped corner of the flow channel is installed with elastic holes 8.3 connected to the bent flow channel , the elastic hole is composed of a communicating hole on the separator and a perforated elastic membrane that blocks the communicating hole. Such a structure can change the size and angle of the elastic hole 8.3 by changing the flow rate or pressure of the water in the flow channel. At the corner position Multi-angle scour is formed to avoid deposition and clogging. The elastic pores 8.3 are preferably small micropores less than 0.1 mm at normal flow rates.

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Abstract

The invention relates to the technical field of high-salt wastewater treatment, in particular to an electrodialysis device for resource utilization of pickled mustard pickled high-salt wastewater, including an electrodialysis reactor, which includes two end plate assemblies and two A membrane stack between the end plate assemblies, the end plate assembly includes an end plate and an electrode plate embedded in the end plate, and the end plate is provided with an electrode column; the membrane stack includes sequentially arranged between the cathode and the anode The bipolar membrane, cationic membrane, anionic membrane and bipolar membrane between the two adjacent membranes, as well as between the electrode plate and the membrane are separated by a separator, and the separator is provided with a bent flow channel, the head and the end of the flow channel are provided with water delivery channels; the present invention uses the separated sodium hydroxide as the pH regulator of the biological section, and hypochlorous acid as the sterilizing liquid of the biological section, and the organic matter is not charged It is left in the source water and enters the biological stage to be removed, and finally realizes the recycling and treatment of mustard mustard wastewater.

Description

technical field [0001] The invention relates to the technical field of high-salt wastewater treatment, in particular to an electrodialysis device for recycling high-salt wastewater from mustard pickling. Background technique [0002] At present, domestic and foreign treatment methods for high-salt wastewater from mustard pickling mainly include biological methods, physical and chemical methods, and combined bio-physical and chemical methods. Because microorganisms have a certain degree of adaptability to salt, low cost, and high treatment capacity, biological methods have become the most important and relatively popular method for high-salt wastewater treatment. However, the salinity of mustard pickling wastewater can reach about 12%, and it is difficult for even domesticated halophilic microorganisms to grow and metabolize normally in such a high-concentration saline environment. [0003] Membrane technology to treat high-salt wastewater has developed rapidly in recent yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F103/32
CPCC02F1/4693C02F2103/32C02F2201/002
Inventor 许林季封丽李子未张勇张晟余海
Owner CHONGQING RES ACAD OF ECO ENVIRONMENTAL SCI
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