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Compound phosphorus removal flocculating agent for water treatment

A flocculant, water treatment technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as land occupation and environmental pollution

Inactive Publication Date: 2010-03-10
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of red mud waste is directly stacked in the open air, it will not only occupy the land, but also easily cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] (1) Preparation of composite water treatment phosphorus removal flocculant

[0017] The red mud and calcium oxide are dried and ground separately through a 100-mesh sieve, mixed evenly at a weight ratio of 1:1, roasted and cooled at 700°C to obtain a composite water treatment phosphorus removal flocculant.

[0018] (2) Phosphorus removal experiment

[0019] In this embodiment, the total phosphorus in the raw water is 103.5 mg / L, and the pH is 3.9. First adjust the pH of the raw water to 5.0, and then add the composite water treatment phosphorus removal flocculant to the raw water under the condition of sufficient stirring. The flocculant is composed of 0.5g / L red mud and 0.5g / L calcium oxide. After conventional mixing, flocculation reaction and precipitation, the removal rate of phosphorus reaches 95.24%.

example 2

[0021] (1) Preparation of composite water treatment phosphorus removal flocculant

[0022] The red mud and calcium oxide are dried and ground separately through a 100-mesh sieve, mixed uniformly at a weight ratio of 2:1, roasted and cooled at 500°C to obtain a composite water treatment phosphorus removal flocculant.

[0023] (2) Phosphorus removal experiment

[0024] In this embodiment, the total phosphorus in the raw water is 103.5 mg / L, and the pH is 3.9. Add the composite water treatment phosphorus removal flocculant to the raw water under the condition of sufficient stirring. The flocculant is composed of 1.5g / L red mud and 1.5g / L calcium oxide. After conventional mixing, flocculation reaction and precipitation, the removal rate of phosphorus reaches 93.56%.

example 3

[0026] (1) Preparation of composite water treatment phosphorus removal flocculant

[0027] The red mud and calcium oxide are dried and ground respectively through a 100-mesh sieve, mixed evenly at a weight ratio of 1:1, roasted and cooled at 300°C to obtain a composite water treatment phosphorus removal flocculant.

[0028] (2) Phosphorus removal experiment

[0029] In this embodiment, the total phosphorus in the raw water is 103.5 mg / L, and the pH is 3.9. First adjust the pH of the raw water to 8.0, and then add the composite water treatment phosphorus removal flocculant to the raw water under the condition of sufficient stirring. The flocculant is composed of 0.5g / L red mud and 0.5g / L calcium oxide. After conventional mixing, flocculation reaction and precipitation, the phosphorus removal rate reaches 99.91%.

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PUM

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Abstract

The invention discloses a compound phosphorus removal flocculating agent for water treatment, which is compounded by red mud and calcium oxide. The flocculating agent is simple in preparation method,good in phosphor removal effect, low in agent cost, safe and reliable, suitable for a wide range of water treatment engineering and most suitable for treating phosphor-containing wastewater with highconcentration.

Description

technical field [0001] The invention discloses a composite water treatment phosphorus removal flocculant, in particular relates to a coagulation and phosphorus removal technology suitable for high-concentration phosphorus-containing wastewater, and belongs to the field of water treatment chemicals. Background technique [0002] Phosphorus is an important industrial raw material, which is widely used in industrial production such as chemical fertilizers, detergents, food and beverage, and metallurgy, so phosphorus-containing wastewater is inevitably generated in industrial production. If the untreated phosphorus-containing wastewater is directly discharged into the water body, it will not only cause a waste of phosphorus resources, but more importantly, it will cause eutrophication of the water body, reduce the quality of the water body, and pollute the increasingly scarce precious water resources. [0003] At present, the commonly used removal methods at home and abroad can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 栾兆坤赵颖贾智萍梁震史丽
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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