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Electric flocculation-self-cleaning membrane wastewater treatment device

A wastewater treatment and self-cleaning membrane technology, applied in the field of water treatment, can solve problems such as rising of the conductive membrane interface, affecting the long-term operation performance of the reactor, membrane pollution, etc., achieve good treatment effect, achieve long-term stable operation, and good removal effect Effect

Active Publication Date: 2022-04-05
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under long-term operating conditions, the OH produced by the hydrogen evolution reaction - It accumulates near the cathode, which leads to a local increase in the pH of the conductive membrane interface, and is easy to combine with metal ions to form inorganic scaling or organic-inorganic composite gel layer, causing irreversible membrane fouling and affecting the long-term operation performance of the reactor.

Method used

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  • Electric flocculation-self-cleaning membrane wastewater treatment device
  • Electric flocculation-self-cleaning membrane wastewater treatment device
  • Electric flocculation-self-cleaning membrane wastewater treatment device

Examples

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Effect test

specific Embodiment approach

[0053] The specific embodiment: the first water pump 3 pumps sewage from the raw water pool 2 into the main reaction tank 5, the DC power supply 19 is turned on, and the cathode membrane 16 and the anode plate 17 are energized, and oxygen is pumped to the cathode membrane 16 by the aeration pump 20 , the aluminum plate releases Al 3+ The flocculant is generated in situ, and the impurities in the sewage are precipitated and deposited into the electrocoagulation settling tank 25. Since the main reaction tank 5 is divided into several secondary reaction tanks, and the top surface of the baffle plate 12 is located at the top surface of the main reaction tank 5 Below, the upper layer of clear water in the upper secondary reaction tank enters the lower secondary reaction tank to repeat the above sedimentation steps, the effect of sewage treatment is improved through multi-stage sedimentation, and the second water pump 10 pumps the treated sewage into the clean water storage tank 11 ...

Embodiment 1

[0057] Preparation of laboratory simulation wastewater: humic acid 20mg / L, kaolin 10mg / L, adding sodium chloride as background electrolyte. Use aluminum plate as anode, polypyrrole / copper / stainless steel mesh self-cleaning conductive film as cathode, the distance between the plates is 1cm, and the current density is 5A / m 2 , the initial pH of the simulated wastewater is 7, the effluent flux is 5L / h, and the removal rate of humic acid is investigated. When the reactor was running for 15 minutes, the removal rate of humic acid was 75.65%, after which the effluent quality remained stable.

Embodiment 2

[0059] Preparation of laboratory simulation wastewater: humic acid 20mg / L, kaolin 10mg / L, adding sodium chloride as background electrolyte. Use aluminum plate as anode, polypyrrole / copper / stainless steel mesh self-cleaning conductive film as cathode, the distance between the plates is 1cm, and the current density is 10A / m 2 , the initial pH of the simulated wastewater is 7, the effluent flux is 5L / h, and the removal rate of humic acid is investigated. With respect to embodiment one, when reaction runs 15min, the removal rate of humic acid is 81.47%, and this is due to having improved current density, the Al of anode dissolution 3+ As the amount increases, the hydroxyaluminum complexes also increase, thereby accelerating the removal rate of humic acid.

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Abstract

The electric flocculation-self-cleaning membrane wastewater treatment device comprises a base, and a raw water tank, a main reaction tank and a clear water storage tank are fixedly connected to the top end of the base; a plurality of baffles are fixedly connected to the inner wall of the top of the main reaction tank and divide the main reaction tank into a plurality of secondary reaction tanks; the bottom ends of the plurality of secondary reaction tanks are fixedly connected with electric flocculation settling tanks, the electric flocculation settling tanks are communicated with the secondary reaction tanks, a pollution discharge assembly is arranged below the electric flocculation settling tanks, and the plurality of electric flocculation settling tanks are communicated with the pollution discharge assembly; an electrode assembly and an aeration assembly are mounted in the secondary reaction tank; the top end of the base is also fixedly connected with a direct-current power supply and an aeration pump; the aeration pump is communicated with the aeration assembly; the electrode assembly comprises an anode plate detachably connected with the inner wall of the secondary reaction tank, a plurality of cathode membranes are symmetrically arranged on two sides of the anode plate, and the anode plate and the cathode membranes are electrically connected with the direct-current power supply. The sewage treatment device has a better sewage treatment effect through multi-stage sedimentation, and the electrode assembly can keep a good effect in long-term operation.

Description

technical field [0001] The present invention relates to the technical field of water treatment, in particular to an electroflocculation-self-cleaning membrane wastewater treatment device. Background technique [0002] Humic acid (HA) is a common natural organic matter and has been widely used as agricultural fertilizer in recent years. The residual HA infiltrates into natural water bodies in the form of non-point sources with agricultural wastewater. Due to the complex molecular structure of HA, it has high stability in water, and can adsorb, ion exchange and chelate with organic and inorganic pollutants in water, and react with chlorine to generate chloroform (THMs), haloacetic acid ( HAAs) and other toxic disinfection by-products. Traditional processes cannot completely remove HA in water, so it is an urgent problem to seek cost-effective natural organic wastewater treatment processes. [0003] Electroflocculation (EC) technology combines the technical advantages of coag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/30
CPCY02W10/10
Inventor 刘美君张海丰姜婷婷郝紫鑫王胜利
Owner NORTHEAST DIANLI UNIVERSITY
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