Method and device for treating phosphorus wastewater by adopting multi-electrode baffling electric flocculation process

A technology for technical treatment and deflecting electricity, which is applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Incomplete and other problems, to achieve the effect of avoiding the decline of electrolysis efficiency, avoiding electrolysis short flow, and reducing treatment costs

Active Publication Date: 2015-07-22
中国中化股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing electrocoagulation wastewater treatment technology has several disadvantages: first, the anode generates a high concentration of metal cations after electrification and electrolysis, and an ion concentration gradient is formed between the ion concentration of the solution near the electrode and the bulk solution, and the concentration polarization will affect the electrode. plate electrolysis effic

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  • Method and device for treating phosphorus wastewater by adopting multi-electrode baffling electric flocculation process
  • Method and device for treating phosphorus wastewater by adopting multi-electrode baffling electric flocculation process
  • Method and device for treating phosphorus wastewater by adopting multi-electrode baffling electric flocculation process

Examples

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Example Embodiment

[0021] Example 1

[0022] The multi-polar plate baffle electric flocculation treatment process of phosphorus-containing wastewater uses polymer organic resin as the electrolytic cell, the specification is 200mmx200mmx200mm, and the effective volume is 4L. Using iron plate and aluminum plate as electrodes, the electrode plate size is 105mmx87mmx2mm, and the effective area is 78.8cm 2 , Set up 8 kinds of cathode and anode and arrangement mode, the distance between the plates is 1.5cm. Use NaOH solution to adjust the pH of the wastewater to 7.0-8.0, the initial total phosphorus concentration is 10.0mg / L, and the batch electrolysis treatment with DC power supply, the current density is 2.54mA / cm 2 , The aeration volume is 0.25L / (L·min), and the total electrolysis time is 15-30min. After the drained water was allowed to stand for 30 minutes, the total phosphorus concentration of the sample was measured. The effect of electro-flocculation for phosphorus removal with different cathode ...

Example Embodiment

[0025] Example 2

[0026] The multi-polar plate baffle electric flocculation treatment process of phosphorus-containing wastewater uses polymer organic resin as the electrolytic cell, the specification is 200mmx200mmx200mm, and the effective volume is 4L. With iron plate as anode and aluminum plate as cathode, the size of the electrode plate is 105mmx87mmx2mm, and the effective area is 78.8cm 2 . The distance between the anode and cathode plates is set at 4 levels, 1cm, 1.5cm, 3cm, 4cm. Use NaOH solution to adjust the pH value of wastewater from 7.0 to 8.0, the initial total phosphorus concentration is 10.0mg / L, use DC power batch electrolysis treatment, current density 2.54mA / cm 2 , The aeration volume is 0.25L / (L·min), and the electrolysis time is both 30min. After the drained water was allowed to stand for 30 minutes, the total phosphorus concentration of the sample was measured. The effect of electro-flocculation with different plate spacing is shown in Table 2.

[0027] Tab...

Example Embodiment

[0029] Example 3

[0030] The multi-polar plate baffle electric flocculation treatment process of phosphorus-containing wastewater uses polymer organic resin as the electrolytic cell, the specification is 140mmx55mmx185mm, and the effective volume is about 1.20L. Set two sets of electrolysis, one set is non-inductive, the electrode connection method is Fe(+)-Fe(-)-Fe(+), and the other set is set to induction electrolysis, and the electrode arrangement is Fe(+)-Fe (inductive electrode Plate)-Fe(-), the size of the pole plate is 145mmx60mmx2mm, the effective area of ​​the single plate is 71.5cm 2 , The distance between male and female boards is 1.5cm. Using the baffled electrolysis method, the wastewater flows along the folds of the electrode plates, and the pH value of the wastewater is adjusted to 7.0-8.0 with NaOH solution, the initial total phosphorus concentration is 10.0mg / L, the continuous flow electrolysis treatment with DC power supply, the conductivity is 150μS / cm, The c...

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Abstract

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method and a device for treating phosphorus wastewater by adopting a multi-electrode baffling electric flocculation process. The PH value of wastewater is regulated with alkaline liquor to 7.0-8.0; the regulated wastewater is pumped into an electric flocculation tank through a peristaltic pump, is subjected to electrolytic flocculation treatment through the baffling of a multi-electrode under the condition of aeration, and then is discharged through an overflow launder, the discharged water is collected and left to stand for 30 minutes, a liquid supernatant is discharged, a floc is recycled; a power supply of the electric flocculation tank is a direct current power supply, the current density is 1.27-5.08mA/cm<2>, and the electrolysis time is 2 minutes to 48 hours. The technical characteristics are as follows: the wastewater baffles along the multi-electrode, then the short stream of the wastewater is avoided, the chance of enabling a pollutant in the wastewater to be in contact with a high-concentration flocculating agent in an electrolysis plate is increased, the flocculent precipitation is promoted, so that the pollutant treatment effect is improved. The multi-electrode baffling electric flocculation process is suitable for treating inorganic phosphorus wastewater at medium and low concentrations, needed equipment is simple, easy in operation and low in cost, and runs stably, so that the process is an electrochemistry phosphorous removal process having a high potential.

Description

Technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and specifically is a method and device for treating phosphorus-containing wastewater by adopting a multi-polar plate baffle electric flocculation technology. Background technique [0002] Most of the phosphorus-containing wastewater comes from domestic sewage, chemical sewage, livestock sewage, and loss of fertilizer from cultivated land. Phosphorus is one of the main elements that cause the eutrophication of water bodies. The eutrophication of water bodies causes the plankton to multiply, which causes the water quality to turn black and smelly, destroy the beauty of the living environment, affect the survival of aquatic organisms, cause the deterioration of ground water bodies, and threaten humans. health. According to my country's "Urban Sewage Treatment Plant Discharge Standard" (GB18918-2002), the first level A standard for total phosphorus emission of urban se...

Claims

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Application Information

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IPC IPC(8): C02F1/463C02F1/58
Inventor 段秀梅黄剑宇张大明
Owner 中国中化股份有限公司
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