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Internal electrolysis-electric flocculation method for processing phosphor-containing wastewater

A technology of electrocoagulation and internal electrolysis, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of incomplete settlement, discharge or reuse of phosphorus-containing wastewater, and achieve Meet the treatment requirements, reduce operating costs, simple process effect

Inactive Publication Date: 2015-11-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the internal electrolysis method alone is not enough to meet the discharge or reuse standards for phosphorus-containing wastewater. The large particles generated during the aeration and internal electrolysis treatment of the wastewater are easily crushed and formed into small particles that are in a suspended state and cannot be completely settled.

Method used

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  • Internal electrolysis-electric flocculation method for processing phosphor-containing wastewater
  • Internal electrolysis-electric flocculation method for processing phosphor-containing wastewater
  • Internal electrolysis-electric flocculation method for processing phosphor-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The phosphating wastewater used in this study was obtained from an automobile industry company in Suzhou, China. The initial pH value of the raw wastewater was 6.41 and the content of total phosphorus was 88.279mg / L. At room temperature (25°C), the phosphating tank water is treated without adjusting the pH value and enters the internal electrolysis device under continuous aeration conditions. The filler in the internal electrolysis device is iron filings and a small amount of copper filings. After the phosphating tank water is treated by internal electrolysis, the pH value of the solution changes to 8.87. After the wastewater has been treated to meet the discharge standard, it is left to stand for a period of time in the device, and the yellow supernatant after static sedimentation is taken to enter the next step of the electrocoagulation treatment process. The electrocoagulation is performed directly without adjusting the pH value, and the output current density is con...

Embodiment 2

[0027] The phosphating wastewater used in this study was obtained from an automobile industry company in Suzhou, China. The pH value of the raw wastewater was 6.41, and the contents of COD, nickel and manganese were 40mg / L, 15.834mg / L and 10.339mg / L, respectively. At room temperature (25°C), the phosphating tank water is treated without adjusting the pH value and enters the internal electrolysis device under continuous aeration conditions. The filler in the internal electrolysis device is iron filings and a small amount of copper filings. The pH value of the phosphating tank water was changed to 8.75 after internal electrolysis treatment. After the wastewater has been treated to meet the subsequent treatment requirements, it is left to stand for a period of time in the device, and the yellow supernatant after static sedimentation is taken into the next step of electrocoagulation treatment process. The electrocoagulation is directly performed without adjusting the pH value of t...

Embodiment 3

[0031]The phosphating wastewater used in this study was obtained from an automobile industry company in Suzhou, China. The pH value of the wastewater is 4.01, and the total phosphorus content is 77.148mg / L. At room temperature (25° C.) without adjusting the pH value, enter the internal electrolysis device for continuous aeration, and the filler in the internal electrolysis device is iron filings and a small amount of copper filings. The pH value of the phosphating tank water changed to 7.57 after internal electrolysis treatment. After the wastewater has been treated to meet the subsequent treatment requirements, it is left to stand for a period of time in the device, and the yellow supernatant after static sedimentation is taken into the next step of electrocoagulation treatment process, and the pH value of the wastewater is not adjusted directly for electrocoagulation, and the output is controlled by a DC power supply The current density is 3mA / cm 2 , the working voltage is...

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Abstract

The invention provides an internal electrolysis-electric flocculation method for processing phosphor-containing wastewater, and belongs to the technical field of phosphor-containing wastewater treatment. The processing method comprises two parts: internal electrolysis and electric flocculation; the phosphor-containing wastewater is subjected to internal electrolysis at first, after the phosphor-containing wastewater reaches the requirements of post treatment, the phosphor-containing wastewater is subjected to electric flocculation, the provided method can eliminate the pollutants in one step and is capable of clarifying the wastewater at the same time, the processed wastewater can reach the discharge standards or reuse requirements, and moreover, the energy consumption and the treatment cost are low during the wastewater treatment process.

Description

technical field [0001] The invention belongs to the technical field of phosphorus-containing wastewater treatment, in particular to an internal electrolysis-electrocoagulation method for treating phosphorus-containing wastewater. Background technique [0002] Phosphorus is one of the main pollutants in urban sewage, and the direct discharge of phosphorus-containing wastewater will lead to serious water pollution. If not treated, direct discharge will seriously pollute the water body, leading to eutrophication of the water body. Eutrophication has many negative effects on aquatic ecosystems such as the increase of algae, deterioration of water quality, lack of oxygen, reduction of natural habitats and impact on aquaculture and shellfish fisheries. Currently, the commonly used phosphorus removal methods include chemical precipitation and biological methods. The chemical treatment system is easy to operate and has strong impact resistance, but the treatment cost is increased ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/463C02F1/58
Inventor 普世祥李龙海潘龙潘卓兮马振杰
Owner JIANGSU UNIV
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