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Composite phosphorus removing agent and preparation method thereof

A phosphorus removal agent and composite technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve the problem of large sludge production, low product utilization rate, and metals that are unfavorable to biological systems Growth and other problems, to achieve the effect of improving biological phosphorus removal efficiency, improving microbial activity, and reducing treatment pressure

Inactive Publication Date: 2017-09-05
深圳华联伟创环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Phosphorus in the water quality environment is one of the important indicators of water eutrophication. my country's water eutrophication is becoming more and more serious, and the discharge standards of industrial sewage and domestic sewage are also increasing year by year. Phosphorus is a strict control indicator, which has been increased from 5mg / l a few years ago Up to the current 0.5mg / l, the traditional biological phosphorus removal has been unable to meet the discharge standards, and it is necessary to add chemical phosphorus removal agents to meet the requirements
[0003] At present, most phosphorus removal agents are mainly composed of inorganic iron salts, aluminum salts, calcium salts or iron-aluminum-calcium-magnesium compounds, forming metal phosphate precipitates, which are removed by sludge discharge, and the phosphorus removal effect is good, but the product Low utilization rate, large sludge production, and the addition of a large amount of metals are not conducive to the growth of biological systems, and are not conducive to sludge incineration or composting disposal

Method used

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  • Composite phosphorus removing agent and preparation method thereof
  • Composite phosphorus removing agent and preparation method thereof
  • Composite phosphorus removing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A compound type phosphorus removal agent, the composition of the compound type phosphorus removal agent in weight percent is as follows: the mass percentage of sugar is 28%, the mass percentage of soda ash is 0.08%, the mass percentage of magnesium salt is 1.2%, and the mass percentage of calcium salt is 0.1% , and the rest is water.

[0025] Take the actual application of domestic sewage treatment plants containing industrial sewage in the south as an example. The sewage treatment plant adopts the A2O process, and the compound phosphorus removal agent of Example 1 is added to the aerobic section. The treatment data are as follows:

[0026]

[0027] The proportion of inorganic salts that form precipitates in the agent is only 1.58%, which is much less than that of conventional inorganic phosphorus removal agents that rely solely on precipitation to remove phosphorus.

Embodiment 2

[0029] A compound type phosphorus removal agent, the weight percent composition of the compound type phosphorus removal agent is as follows: the mass percentage of sugar is 41%, the mass percentage of soda ash is 0.2%, the mass percentage of magnesium salt is 1.52%, and the mass percentage of calcium salt is 0.33% , and the rest is water.

[0030] Taking the practical application of domestic sewage treatment plants containing industrial sewage in the south as an example, the sewage treatment plant adopts the A2O process, and the compound phosphorus removal agent of Example 2 is added to the aerobic section. The treatment data are as follows:

[0031]

[0032] The proportion of inorganic salts that form precipitates in the agent is only 1.51%, which is much less than the sludge formed by conventional inorganic phosphorus removal agents that rely solely on precipitation to remove phosphorus.

Embodiment 3

[0034] A compound type phosphorus removal agent, the weight percent composition of the compound type phosphorus removal agent is as follows: the mass percentage of sugar is 35%, the mass percentage of soda ash is 0.14%, the mass percentage of magnesium salt is 1.36%, and the mass percentage of calcium salt is 0.21% , and the rest is water.

[0035] Taking the actual application of domestic sewage treatment plants containing industrial sewage in the south as an example, the sewage treatment plant adopts the A2O process, and the compound phosphorus removal agent of Example 3 is added to the aerobic section. The treatment data are as follows:

[0036]

[0037] The proportion of inorganic salts that form precipitates in the agent is only 1.57%, which is much less than the sludge formed by conventional inorganic phosphorus removal agents that rely solely on precipitation to remove phosphorus.

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Abstract

The invention relates to a composite phosphorus removing agent and a preparation method thereof. The composite phosphorus removing agent is prepared from, by mass, 28%-41% of saccharides, 0.08%-0.2% of sodium carbonate, 1.2%-1.52% of magnesium salt, 0.1%-0.33% of calcium salt and the balance water. By adoption of the design, the saccharides (such as glucose and white sugar) excellent in biodegradability are adopted for improving bioactivity and biological phosphorus removal efficiency; by addition of a small amount of calcium and magnesium salts, indissolvable struvite (magnesium ammonium phosphate) precipitate can be formed, residual phosphorus is effectively controlled, and the phosphorus content is decreased to 0.5mg / L or below. The composite phosphorus removing agent and the preparation method thereof have advantages of low quantity of generated inorganic sludge and great relief of solid sludge treatment pressure.

Description

technical field [0001] The invention relates to a phosphorus removal agent and a preparation method thereof, in particular to a composite type phosphorus removal agent and a preparation method thereof. Background technique [0002] Phosphorus in the water quality environment is one of the important indicators of water eutrophication. my country's water eutrophication is becoming more and more serious, and the discharge standards of industrial sewage and domestic sewage are also increasing year by year. Phosphorus is a strict control indicator, which has been increased from 5mg / l a few years ago Up to the current 0.5mg / l, the traditional biological phosphorus removal has been unable to meet the discharge standards, and it is necessary to add chemical phosphorus removal agents to meet the requirements. [0003] At present, most phosphorus removal agents are mainly composed of inorganic iron salts, aluminum salts, calcium salts or iron-aluminum-calcium-magnesium compounds, formi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F2305/06
Inventor 杨光张正刚陈华
Owner 深圳华联伟创环保技术有限公司
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