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Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water

A compound dephosphorization agent, high-concentration technology, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of not being able to be used as a dephosphorization agent, and achieve low production cost and simple reaction conditions , The effect of simple raw materials

Active Publication Date: 2012-07-18
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many scholars use tobermorite as the seed crystal, and the phosphate ion in the wastewater generates hydroxyapatite to form crystals on the tobermorite, but the tobermorite is only used as the seed crystal, and cannot be used for phosphorus removal. agent

Method used

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  • Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water
  • Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water
  • Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a) Take 0.912g of zeolite, 2.83g of sodium silicate, 1.536g of calcium oxide, 25.0g of water, fully stir it and place it in a 50mL reactor at a heating rate of 5°C / min, and raise it to 180°C for reaction. The reaction time is 10h. Cooling, filtering to obtain white solid material, solid material is washed, dried to obtain composite phosphorus removal agent.

[0022] b) Use the composite phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater, with a phosphorus concentration of 100mg / L, add 4.0g of the composite phosphorus removal agent prepared above to each liter of phosphorus-containing wastewater, stir for 1 hour, and effluent The phosphorus content in wastewater is 0.2319mg / L. The removal rate of phosphorus is ≥99.77%.

Embodiment 2

[0024] a) Take 0.912g of zeolite, 2.83g of sodium silicate, 1.400g of calcium oxide, 25.0g of water, fully stir and place it in a 50mL reactor at a heating rate of 5°C / min, and raise the temperature to 180°C for reaction. The reaction time is 10h. Cooling, filtering to obtain white solid material, solid material is washed, dried to obtain composite phosphorus removal agent.

[0025] b) Use the composite phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater, with a phosphorus concentration of 50mg / L, add 4.0g of the composite phosphorus removal agent prepared above to each liter of phosphorus-containing wastewater, stir for 1 hour, and effluent The phosphorus content in wastewater is 0.3338mg / L. The removal rate of phosphorus is ≥99.33%.

Embodiment 3

[0027] a) Take 1.00g of zeolite, 2.50g of sodium silicate, 1.600g of calcium oxide, 30.0g of water, fully stir and place it in a 50mL reactor at a heating rate of 5°C / min, and raise the temperature to 180°C for reaction. The reaction time is 8h. Cooling, filtering to obtain white solid material, solid material is washed, dried to obtain composite phosphorus removal agent.

[0028] b) Use the composite phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater, with a phosphorus concentration of 20mg / L, add 4.0g of the composite phosphorus removal agent prepared above to each liter of phosphorus-containing wastewater, stir for 1h, and effluent The phosphorus content in wastewater is 0.3433mg / L. The removal rate of phosphorus is ≥98.28%.

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Abstract

The invention relates to a composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water and a preparation and application method. The composite phosphorus removing agent is obtained by using zeolite, sodium silicate, calcium oxide and water as raw materials through hydrothermal synthesis; the composite phosphorus removing agent contains 2.0 to 3.0 percent of aluminum, 18 to 20 percent of calcium and 25 to 28 percent of silicon dioxide; and 4.0g / L of composite phosphorus removing agent is added into 20 to 100mg / L of phosphorus-containing waste water, the waste water is stirred for one hour, and the phosphorus content of the effluent reaches national first-grade discharge standard. The composite phosphorus removing agent is suitable for treating the high-concentration phosphorus-containing waste water, and is not required to be regulated by using alkali after the composite phosphorus removing agent is added; the method is simple; and the precipitated crystal can be recycled for over 12 times.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment in environmental protection, and relates to a preparation and application method of a composite phosphorus removal agent for treating high-concentration phosphorus-containing wastewater. Background technique [0002] The continuous development and utilization of environmental resources by humans has caused a large amount of phosphorus-containing domestic sewage and factory wastewater to be discharged into rivers and lakes, increasing the nutrient load of water bodies, leading to eutrophication of water bodies, and contributing to industry, agriculture, aquaculture and life. The water used in the industry has brought harm, so various phosphorus removal methods are also used in wastewater treatment. [0003] Phosphorus removal methods are divided into physical methods, chemical methods and biological methods. The physical method is rarely applied because of high cost and complex technology. Biological...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58
Inventor 宋功武王仁宗李玲沙淮丽何瑜刘裕
Owner HUBEI FORBON TECH
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