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Iron contact dephosphorization device and method

A technology of plates and components, applied in the field of water treatment, to achieve the effects of reducing eutrophication, reducing the load of subsequent treatment processes, and efficiently removing

Inactive Publication Date: 2009-10-21
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under a reasonable residence time, such a corrosion rate is only suitable for treating low-concentration phosphorus-containing sewage (wastewater) water

Method used

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  • Iron contact dephosphorization device and method
  • Iron contact dephosphorization device and method
  • Iron contact dephosphorization device and method

Examples

Experimental program
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Embodiment Construction

[0022] If the treatment of conventional urban sewage with a total phosphorus concentration of 3-7 mg / L (refer to figure 1 ), the iron contact dephosphorization method of the present invention refers to that conventional urban sewage enters the iron contact dephosphorization device through the water inlet pipe, and flows into the sedimentation tank after staying in the iron contact dephosphorization device for a certain period of time, and the sedimentation tank effluent can be directly discharged. The sludge from the iron contact phosphorus removal device and the sedimentation tank enters the subsequent sludge recycling system through the sludge pipe. The operation mode of the iron contact phosphorus removal device: adopt intermittent aeration mode, the ratio of aeration / stop time is 3 / 1~3 / 2, and the stop time should not exceed 30min, and the aeration intensity is 3~6m 3 / (m 3 h), the hydraulic retention time is 7 to 9 hours, the sludge discharge frequency is once every 2 to ...

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Abstract

The iron-contact dephosphorization device and method is a high-efficiency dephosphorization device and method using iron-carbon alloys and materials more inert than iron-carbon alloys as the electrochemical corrosion bipolar system. This device and method can effectively remove organic matter, etc., It can efficiently remove phosphorus in sewage (waste) water with different concentrations, especially high concentration phosphorus. The device includes a water inlet pipe (1), an outlet pipe (5), a plate assembly (2), an aeration system (3), and a sludge bucket (4); the sewage enters the iron contact dephosphorization device through the water inlet pipe, and the iron contact The dephosphorization device flows into the sedimentation tank after going through a tortuous process, and the effluent from the sedimentation tank can be directly discharged or returned to the adjustment tank for subsequent treatment. its reuse.

Description

technical field [0001] The invention relates to a device and method for removing phosphorus from sewage (waste) water, belonging to the technical field of water treatment. Background technique [0002] Phosphorus is the main cause of eutrophication in water bodies, and it is also an indispensable nutrient element for life. It is a resource that is difficult to regenerate and is increasingly depleted. [0003] At present, the methods for phosphorus removal from sewage mainly include biological and chemical methods. The biological phosphorus removal process is complicated and the effluent stability is poor; although the chemical phosphorus removal has a good treatment effect, the phosphorus removal materials (agents) used are mostly lime, aluminum salts, iron salts, ferrous salts, and magnesium salts. Products, the cost of phosphorus removal agents is high, and the amount of sludge is large, which causes the bottleneck in the practical application of this method. [0004] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/70C02F9/14
Inventor 王世和陆敏博
Owner SOUTHEAST UNIV
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