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Dephosphorization method of phosphorus-containing waste water

A waste water and clear liquid technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high operating cost, large investment in phosphorus-containing waste water process, and achieve equipment Simple, low cost and easy to obtain, reducing the cost of treatment facilities

Active Publication Date: 2011-01-12
福华通达化学股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of large investment and high operating costs in the process of treating phosphorus-containing wastewater in the prior art, and provides a phosphorus removal method for phosphorus-containing wastewater that can remove both inorganic phosphorus and organic phosphorus. Inexpensive, convenient and easy to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Treatment of bleaching powder after heating glyphosate wastewater:

[0024] Add 1000g of glyphosate-produced waste water (containing 20135PPM phosphorus) into a three-neck reaction flask, heat to 30°C, add 66g of bleaching powder, stir for 3 minutes, and let stand for 20 minutes. White thread-like precipitates are formed, filtered through double-layer filter paper, and the filtrate The detection of total phosphorus is 0.8PPM.

Embodiment 2

[0026] Treatment of bleaching powder after heating glyphosate wastewater:

[0027] Add 1000g of glyphosate-produced waste water (containing 21239PPM phosphorus) into a three-neck reaction flask, heat to 90°C, add 231g of bleaching powder, stir for 10 minutes, and let stand for 12 hours. White thread-like precipitates are formed, filtered with double-layer filter paper, and the filtrate The detection total phosphorus is 0.7PPM.

Embodiment 3

[0029] Treatment of bleaching powder after heating glyphosate wastewater:

[0030] Add 1000g of glyphosate-produced waste water (containing 20354PPM phosphorus) into a three-neck reaction flask, heat to 90°C, add 132g of bleaching powder, stir for 7 minutes, and let stand for 5 hours. White thread-like precipitates are formed, filtered through double-layer filter paper, and the filtrate The detection of total phosphorus is 0.9PPM.

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PUM

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Abstract

The invention relates to a dephosphorization method of phosphorus-containing waste water. The invention provides a dephosphorization method of the phosphorus-containing waste water, which can remove inorganic phosphorus and organic phosphorus and has low cost of equipment and raw materials. The invention adopts bleaching liquor or bleaching powder to remove total phosphorus; free chlorine released by the bleaching liquor or the bleaching powder combines with phosphorus atoms to cause organic phosphine to be converted into phosphate radical or hypophosphite; calcium ions in the bleaching liquor or the bleaching powder react with the phosphate radical or the hypophosphite to generate sediment and then are removed; and the inorganic phosphorus and the organic phosphorus are removed together. The method of the invention has simple equipment, small investment, greatly reduces the cost investment of treatment facilities, has low cost and easy acquisition for the bleaching liquor or the bleaching powder, and is easy to be popularized and used; in addition, the sediment taking calcium phosphate as the main component can be used as the raw material for producing phosphatic fertilizers in phosphate fertilizer plants.

Description

technical field [0001] The invention relates to a method for treating wastewater, more specifically, the invention relates to a method for removing phosphorus from phosphorus-containing wastewater. Background technique [0002] Phosphorus is widely used in chemical production, especially in the production of pesticides. The wastewater generated by the process often contains high concentrations of phosphorus, which has an impact on the environment. The country has formulated very strict discharge standards. [0003] In chemical production wastewater, phosphorus mainly exists in the form of inorganic phosphorus represented by phosphate and various forms of organic phosphine. At present, the main method for removing phosphorus is ferrous sulfate phosphorus removal method. This method has a good effect in removing inorganic phosphorus. However, there is basically no removal effect on organic phosphorus. For the prior art, organic phosphorus is converted into inorganic phosphorus...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 姜永红彭永忠冯杰
Owner 福华通达化学股份公司
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