Phosphorus containing waste water treatment method and its application of recovered phosphorus product

A wastewater treatment and wastewater technology, applied in the direction of flocculation/sedimentation water/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the adverse effects of biological treatment, reduce the pH value of water and other problems, increase the release effect, and accelerate flocculation speed, quality-enhancing effects

Inactive Publication Date: 2005-03-23
TSINGHUA UNIV
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Problems solved by technology

However, in the traditional sewage biological treatment process, the addition of iron salt will reduce the pH value of the water. Although the exce

Method used

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  • Phosphorus containing waste water treatment method and its application of recovered phosphorus product

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Experimental program
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Effect test

Embodiment 1

[0019] The addition of embodiment 1 quaternary ammonium salt tannic acid is to the phosphorus removal effect of different waste water

[0020] source of waste water

Embodiment 2

[0021] The addition of embodiment 2 quaternary ammonium salt tannic acid has phosphorus removal effect on artificial phosphoric acid wastewater

[0022] Add a certain amount of FeCl to the artificial wastewater with a phosphorus concentration of 7mg / L 3 , FeCl 3 The concentration dispersed in the wastewater is 10mg / L, stirred at 200rpm for 2min, and then stirred at 20rpm for 30min, and the phosphorus concentration, turbidity and residual iron concentration of the treated water were measured, which were 2.5mg / L, 15 and 1.5mg / L respectively.

[0023] Add a certain amount of FeCl to the artificial wastewater with a phosphorus concentration of 7mg / L 3 , FeCl 3 The concentration dispersed in waste water is 10mg / L, 200rpm stirs 2min, then adds quaternary ammonium salt tannic acid, and its concentration dispersed in waste water is 2mg / L, 20rpm stirs 30min, measure the phosphorus concentration of treated water, turbidity and The residual iron concentrations were 2.5mg / L, 10 and 0.8...

Embodiment 3

[0024] Example 3 The addition of quaternary ammonium tannic acid to the phosphorus removal effect of aerobic-anaerobic microbial repeated coupling process treatment water

[0025] Prepare artificial wastewater with a phosphorus concentration of 10mg / L. After repeated coupling process of aerobic-anaerobic microorganisms on a laboratory scale, add high-poly iron. Stir again at 100rpm for 2min, and measure the phosphorus concentration, turbidity and residual iron concentration of the treated water, which are 0.5mg / L, 20 and 8mg / L respectively.

[0026] Prepare artificial wastewater with a phosphorus concentration of 10mg / L. After repeated coupling process of aerobic-anaerobic microorganisms on a laboratory scale, add high-poly iron. Then add quaternary ammonium tannic acid, its concentration dispersed in waste water is 20mg / L, 100rpm stirs 2min, measure the phosphorus concentration of treatment water, turbidity and residual iron concentration, be respectively 0.5mg / L, 10 and 0.8m...

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Abstract

A process for treating P-contained sewage featurs that the iron salt is used as its flocculant and the quaternary ammonium salt and tannic acid are used as its co-flocculant for removing P compounds frmo water and decreasing the turbility of water and the content of iron in water. The appliction of said process in recovering P from sewage is also disclosed.

Description

technical field [0001] The invention relates to a method for removing phosphorus from phosphoric acid ion-containing wastewater or treated water and the application of recovering phosphorus products, belonging to the technical field of sewage treatment in environmental protection. technical background [0002] As we all know, one of the reasons for the eutrophication of rivers and lakes is the presence of phosphorus-containing compounds. Phosphorus compounds come from the loss of phosphorus in household water, industrial wastewater and soil. Therefore, phosphorus removal from domestic sewage and industrial wastewater is one of the effective measures to control water eutrophication from the source. Phosphorus removal mainly includes biological and chemical methods. Biological phosphorus removal is a relatively economical method, but the removal rate of phosphorus is usually only 30%-40%. It is difficult for a single biological phosphorus removal process to achieve less than ...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F3/30
Inventor 邢新会刘则华罗明芳
Owner TSINGHUA UNIV
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