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Ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and apparatus thereof

A pulsed electric and membrane composite technology, applied in the field of ultrasonic, pulsed electric flocculation and membrane composite technology to treat wastewater and magnetic field, can solve the problems of fast decline rate of membrane flux, shortened replacement cycle, high investment cost, etc., and achieves good clarification effect. , reduce energy consumption, the effect of small footprint

Inactive Publication Date: 2012-04-25
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the membrane is easily polluted, easily blocked, and difficult to clean. During use, the membrane will be polluted and the flux will decrease. Especially when dealing with high-concentration metal wastewater, the rate of contamination and blockage will be fast, and the rate of decrease in the membrane flux will be rapid. Shorten the replacement period of the membrane and increase the investment cost

Method used

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  • Ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and apparatus thereof
  • Ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and apparatus thereof

Examples

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Effect test

Embodiment 1

[0035] Dealing with heavy metals containing Cr 6+ Wastewater, the treatment process conditions of electrocoagulation reactor 4 are: electrocoagulation voltage: 6V, current: 38A, electrocoagulation treatment time 5min, ultrasonic frequency: 20KHZ, ultrasonic power: 100W, magnetic field strength 0.1T, 4 sets of electrode plates arranged in parallel , the distance between the electrode plates is 3.0cm, the anode is made of iron plate, the cathode is made of aluminum plate, when Cr 6+ When the concentration is about 50g / L, after being treated by the device of the present invention, the heavy metal Cr 6+ The removal rate was 98%. The electrode dissolution time was extended by 19%, and the electrode passivation time was extended by 26%.

Embodiment 2

[0037] Dealing with heavy metals containing Zn 2+ 、Cu 2+ 、Cr 6+ Wastewater, electrocoagulation reactor 4 treatment process conditions are: electrocoagulation voltage: 27V, current: 8A, electrocoagulation treatment time 12min, ultrasonic frequency: 40KHZ, ultrasonic power: 400W, magnetic field strength 0.2T, 4 sets of electrode plates arranged in parallel , the distance between the electrode plates is 3.0cm, the anode is made of iron plate, the cathode is made of aluminum plate, when Zn 2+ 、Cu 2+ 、Cr 6+ When the concentration is about 20g / L, after being treated by the device of the present invention, the heavy metal Zn 2+ 、Cu 2+ 、Cr 6+ The removal rates were 92%, 95%, and 96%, respectively. The electrode dissolution time was extended by 18%, and the electrode passivation time was extended by 23%.

Embodiment 3

[0039] To treat papermaking wastewater, the treatment process conditions of electrocoagulation reactor 4 are: electrocoagulation voltage: 5V, current: 15A, electrocoagulation treatment time 5min, ultrasonic frequency: 40KHZ, ultrasonic power: 300W, magnetic field strength 0.3T, 4 groups arranged in parallel Electrode plates, the distance between the electrode plates is 3.0cm, the anode adopts an iron plate, and the cathode adopts an aluminum plate. When the influent CODcr is at 400mg / L and AOX is at about 6mg / kg slurry, after the waste water is treated by the device of the present invention, CODcr, AOX The removal rates were 92% and 88%, respectively. The electrode dissolution time was extended by 20%, and the electrode passivation time was extended by 28%.

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Abstract

The present invention discloses an ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and an apparatus thereof. The technological process of the method comprises that: waste water is conveyed to an electrocoagulation reactor by a pump in an up-flow manner, wherein an ultrasonic generator, electrode plates and a permanent magnet are arranged inside the electrocoagulation reactor, the electrocoagulation voltage is 5-30 V, the current is 5-40 A, the ultrasonic frequency is 20-100 KHz, the ultrasonic power is 100-400 W, and the magnetic field strength is 0.1-0.3 T; the water sample flows through the positions between the electrode plates, and performs circulating flowing by an outer circulation pump; the waste water is treated for 5-12 minutes by the synergism of the ultrasound, the magnetic field, and the pulse electrocoagulation, and then is conveyed in a sedimentation tank by a pump; the supernatant is conveyed to a membrane assembly to carry out filtration to further separate the mud and the water by a pump, wherein the mud is subjected to concentration treatment and recovery, and the water is subjected to standard discharge. The method of the present invention has the following advantages that: the method is applicable for treatments of a lot of the waste water, and the effluent quality is good and stable.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating waste water by using ultrasonic, magnetic field, pulse electric coagulation and membrane composite technologies and the device used. technical background [0002] Heavy metal wastewater is mainly electroplating wastewater, smelter wastewater and mine wastewater. The discharge of wastewater containing these heavy metals into rivers, lakes and seas will pollute water bodies, destroy ecosystems, and seriously endanger human health and agricultural and fishery production. [0003] Electroflocculation technology is a new type of electrochemical treatment technology developed in recent years. It relies on electrochemical principles. It has a wide range of applications, mainly in electroplating, chemical industry, machinery, metallurgy, mining, battery and other industries. At present, most of the heavy metal wastewater adopts diversion technology and carries o...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F1/463C02F1/44
Inventor 何辉杨崎峰夏南南廖幸新穆英啸
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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