Electrochemical phosphorus removal device and phosphorus removal method

An electrochemical and electrode plate technology, applied in the field of devices for phosphorus removal using electrochemical technology, can solve the problems of substandard treatment of high-concentration phosphorus-containing sewage, large equipment footprint, and high treatment costs, avoiding electrolytic short-flow, The effect of reducing floor space and high processing efficiency

Inactive Publication Date: 2020-04-17
浙江美纳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems in the prior art of treating phosphorus-containing sewage, such as large amount of mud, large area occupied by equipment, high treatment cost, and substandard treatment of high-concentration phosphorus-containing sewage, the invention provides a method for treating high-concentration inorganic wastewater by using electrochemical technology. Device and phosphorus removal method for phosphorus wastewater and high-concentration organic phosphorus wastewater

Method used

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  • Electrochemical phosphorus removal device and phosphorus removal method
  • Electrochemical phosphorus removal device and phosphorus removal method
  • Electrochemical phosphorus removal device and phosphorus removal method

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Controlled process parameters: the distance between the electrode plates is 2cm, the working voltage between the plates is 2v, the sewage electrolysis time is 30min, and the electrode water ratio is 28m 2 : 1m 3 , the current density is 50A / m 2 , its power supply is a high-frequency pulsed DC power supply, the pulse frequency is 5000Hz, and the duty ratio is 10%. 20L / (L min), the pH value of the sewage is adjusted to 8 in the secondary coagulation reaction tank.

[0072] Phosphate surface treatment wastewater containing 256mg / L of inorganic phosphorus (calculated as P) enters the primary coagulation reaction tank 20 for aeration and mixing through the water inlet 9, and the phosphorus-containing sewage after aeration and mixing enters the secondary coagulation reaction Tank 21, start the dosing system at the same time, adjust the sewage pH value to 8, stir and mix; the stirred and mixed phosphorus-containing sewage flows into the perforated pipe 17 through the connect...

Embodiment 2

[0074] Controlled process parameters: the distance between the electrode plates is 1.5cm, the working voltage between the plates is 1v, the electrolysis time is 10min, and the electrode water ratio is 28m 2 : 1m 3 , the power supply is a high-frequency pulsed DC power supply with a current density of 100A / m 2 , the pulse frequency is 20000Hz, the duty cycle is 100%, the aeration volume of the second aeration port 24 is 10L / (L min), the aeration volume of the aeration port one 23 is 40L / (L min), the second Adjust the pH value of sewage to 8 in the coagulation reaction tank.

[0075] Phosphate surface treatment wastewater containing 256mg / L of inorganic phosphorus (calculated as P) enters the primary coagulation reaction tank 20 for aeration and mixing through the water inlet 9, and the phosphorus-containing sewage after aeration and mixing enters the secondary coagulation reaction Tank 21, start the dosing system at the same time, adjust the sewage pH value to 8, stir and mix...

Embodiment 3

[0077] Controlled process parameters: the distance between the electrode plates is 4cm, the working voltage between the plates is 3v, the electrolysis time is 20min, and the electrode water ratio is 28m 2 : 1m 3 , the power supply is a high-frequency pulsed DC power supply with a current density of 100A / m 2 , the pulse frequency is 10000Hz, the duty ratio is 50%, the aeration rate of the second aeration port 24 is 15L / (L min), the aeration rate of the aeration port one 23 is 30L / (L min), the second Adjust the pH value of sewage to 9 in the coagulation reaction tank.

[0078] Phosphate surface treatment wastewater containing 256mg / L of inorganic phosphorus (calculated as P) enters the primary coagulation reaction tank 20 for aeration and mixing through the water inlet 9, and the phosphorus-containing sewage after aeration and mixing enters the secondary coagulation reaction Tank 21, start the dosing system at the same time, adjust the pH value of the sewage to 9, stir and mix...

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Abstract

The invention discloses an electrochemical phosphorus removal device and a phosphorus removal method, and belongs to the technical field of environmental engineering sewage treatment. The electrochemical phosphorus removal device is sequentially provided with a reaction zone and an electrolysis zone, and the reaction zone comprises two stages of coagulation reaction tanks which are separated through a baffle plate; the electrolysis zone comprises an accommodating tank, a water distribution zone, a connecting electrode plate, and an induced electrode plate; and an overflow tank is arranged at the upper part of the accommodating tank. The device disclosed by the invention has the advantages that electrode plate passivation can be reduced, the sludge amount after sewage treatment is small, the equipmehnt occupied area is small, the electrode-water ratio is large, the treatment cost is low, the device can be combined with an existing phosphorus removal equipment for use, and the device isalso suitable for pretreatment of high-concentration phosphorus-containing sewage.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, in particular to a device and method for removing phosphorus by using electrochemical technology. [0002] technical background [0003] Phosphorus-containing wastewater is commonly found in the surface treatment industry of mechanical parts, pharmaceutical and chemical industry, breeding and slaughtering industry, and domestic sewage. Wastewater with excessive phosphorus discharged into water bodies will cause eutrophication, discoloration, red tide, fish death, etc. Ecological deterioration It is a very serious source of environmental pollution. [0004] At present, the most common inorganic phosphorus wastewater treatment processes in China include calcium phosphorus removal and iron-based coagulant phosphorus removal. The disadvantage of the calcium phosphorus removal process is that the amount of mud is large, the effluent needs to add acid to adjust the pH,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/463C02F1/4672C02F1/5236C02F1/5245C02F1/722C02F1/76C02F9/00
Inventor 陈敏感
Owner 浙江美纳环保科技有限公司
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