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Industrial salty slurry base composite dephosphorization material and preparation method thereof

A technology for industrial salt and salt mud, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems that have not yet been reported, achieve environmental protection, add added value, and realize resources the effect of

Inactive Publication Date: 2010-04-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these waste residues are only partially used as low value-added utilization models such as road construction materials, backfill materials, and brick-making materials; while industrial salt mud is used as a base material to develop efficient phosphorus removal materials suitable for sewage treatment and to realize phosphorus removal. Resource recycling, which has not been reported at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the industrial salt mud-based composite phosphorus removal material is as follows:

[0033] a. Put salt mud, calcium carbide slag and binder into the drum granulator and mix evenly to make cementitious material;

[0034] b. Add foaming agent and water to the homogenizer, at 4000r·min -1 Stir at the above speed for 5 minutes, beat the foaming agent into a "milk" foam; add the foam to the uniformly mixed gelling material in batches, and granulate for about 1 hour;

[0035] c. Cold curing: In an environment with a temperature higher than 5°C, cover the formed sphere for 24 hours, and then sprinkle water for curing after 6 to 8 hours; the curing period is about 2 to 3 days.

example 1

[0037] The total mass of the cementitious material is 400g, including 296g of salt mud (70-200 mesh), 80g of carbide slag, 24g of binder, 3.2mL of foaming agent, and 60mL of water.

[0038] Put the salt mud, carbide slag and binder into the drum granulator and mix evenly. Take 3.2mL of foaming agent and 60mL of water and add it to the homogenizer, at 4000r·min -1 Stir for 5 minutes at the above speed, and beat the foaming agent into a "milk" foam. Add the foam to the uniformly mixed cementitious material in batches and granulate for about 1 hour.

[0039] Effect after implementation:

[0040] 1. Static test results show that at 25°C, the theoretical saturated adsorption capacity of phosphorus by salt mud-based phosphorus removal materials (0.5cm particle size) is 17.86mg·g -1 .

[0041] 2. The initial phosphate concentration is 5mg·L -1 , the dosage of salt mud-based phosphorus removal material (0.5cm particle size) is 8g L -1 , the remaining phosphate concentration drop...

example 2

[0043] The total mass of cementitious material is 500g, including 425g of salt mud (70-200 mesh), 125g of carbide slag, 50g of binder, 4.0mL of foaming agent, and 75mL of water.

[0044] Put the salt mud, carbide slag and binder into the drum granulator and mix evenly. Take 4.0mL of foaming agent and 75mL of water and add it to the homogenizer, at 4000r·min -1 Stir for 5 minutes at the above speed, and beat the foaming agent into a "milk" foam. Add the foam to the uniformly mixed cementitious material in batches and granulate for about 1 hour.

[0045] Effect after implementation:

[0046] 1. Static test results show that at 25°C, the theoretical saturated adsorption capacity of phosphorus by salt mud-based phosphorus removal materials (0.5cm particle size) is 17.86mg·g -1 .

[0047] 2. The initial phosphate concentration is 5mg·L -1 , the dosage of salt mud-based phosphorus removal material (0.5cm particle size) is 8g L -1 , the remaining phosphate concentration dropped...

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Abstract

An industrial salty slurry base composite dephosphorization material and a preparation method thereof utilize industrial salty slurry and carbide slag, binder and foaming agent as auxiliary materials for developing a composite dephosphorization material used for sewage (wastewater) treatment, wherein all components in the material have the following proportions in the total material mass: 65% to 85% of the salty slurry, 10% to 25% of the carbide slag, 4% to 10% of the binder and 2-10 per thousand of the foaming agent; and the use of the high-efficient dephosphorization material can lead phosphorus concentration in discharged sewage (wastewater) to reach national 'Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant' (GB18918-2002) primary (A) standard, thus reducing the condition of waterbody eutrophication, and improving the regional ecological environment.

Description

technical field [0001] The invention is a compound dephosphorization material for sewage (waste) water treatment developed by using industrial salt mud and calcium carbide slag, binder and foaming agent, and belongs to the technical field of water pollution prevention and control. Background technique [0002] Phosphorus is the main factor leading to eutrophication of water bodies. At the same time, phosphorus is also an indispensable nutrient element for life, and it is a resource that is difficult to regenerate and is increasingly exhausted. [0003] At present, the removal methods of phosphorus in 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. Due to the high cost of phosphoru...

Claims

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Application Information

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IPC IPC(8): B01J20/02C02F1/28C02F1/58
Inventor 王世和刘焱卓运红张维朱丹周军
Owner SOUTHEAST UNIV
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