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

A compound phosphorus removal agent, a technology of phosphorus removal agent, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment and other directions, can solve the problem of not being used as a phosphorus removal agent, and achieve low production cost and reaction conditions. Simple, simple ingredients

Active Publication Date: 2013-06-05
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

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, and 25.0g of water, and place them in a 50mL reactor after being fully stirred. The heating rate is 5°C / min, and the temperature is raised to 180°C for reaction. The reaction time is 10h. Cool and filter to obtain a white solid substance, which is washed and dried to obtain a composite dephosphorization agent.

[0022] b) Use the compound phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater. The phosphorus concentration is 100 mg / L. Add 4.0 g of the compound phosphorus removal agent prepared above to each liter of phosphorus-containing wastewater, stir for 1 hour, and discharge The phosphorus content in the wastewater was 0.2319 mg / 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, and 25.0g of water, and place them in a 50mL reactor after being fully stirred. The heating rate is 5°C / min, and the temperature is raised to 180°C for reaction. The reaction time is 10h. Cool and filter to obtain a white solid substance, which is washed and dried to obtain a composite dephosphorization agent.

[0025] b) Use the compound phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater, the phosphorus concentration is 50mg / L, add 4.0g of the above-mentioned compound phosphorus removal agent to each liter of phosphorus-containing wastewater, stir for 1 hour, and discharge The phosphorus content in the wastewater was 0.3338 mg / 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, and 30.0g of water. After fully stirring, place it in a 50mL reactor. The heating rate is 5°C / min, and the temperature is raised to 180°C for reaction. The reaction time is 8h. Cool and filter to obtain a white solid substance, which is washed and dried to obtain a composite dephosphorization agent.

[0028] b) Use the compound phosphorus removal agent prepared above to treat simulated high-concentration phosphorus-containing wastewater. The phosphorus concentration is 20mg / L. Add 4.0g of the above-mentioned compound phosphorus removal agent to each liter of phosphorus-containing wastewater, stir for 1 hour, and discharge The phosphorus content in the wastewater was 0.3433 mg / 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 human beings has caused a large amount of phosphorus-containing domestic sewage and factory wastewater to be discharged into rivers and lakes, increasing the load of nutrients in water bodies, leading to eutrophication of water bodies, and causing great harm to industry, agriculture, aquaculture and life. The use of water has brought harm, so various phosphorus removal methods are also applied to the treatment of wastewater. [0003] Phosphorus removal methods are divided into physical, chemical and biological methods. The physical method is rarely used because of its high cost and complicated technology. Th...

Claims

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Application Information

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Patent Type & Authority Patents(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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