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Method for removing organophosphorus amino trimethylene phosphonic acid in wastewater with chemical precipitation method

A technology of aminotrimethylene phosphonic acid and chemical precipitation method, which is applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, water pollutants, etc., can solve the problem of poor organic phosphorus removal effect, unstable operation, and applicable Narrow range and other problems, to achieve the effect of convenient follow-up process treatment, good flocculation effect and convenient operation

Inactive Publication Date: 2016-06-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for removing organic phosphorus ATMP in the prior art generally have the disadvantages of cumbersome operation, high cost and narrow application range
In addition, the prior art wastewater phosphorus removal methods still have problems such as poor organic phosphorus removal effect and unstable operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the method for removing organophosphorus ATMP in waste water by chemical precipitation method, the steps are as follows:

[0029] Take 100mL of waste water in a beaker, add 0.06g of solid calcium hydroxide to the waste water under normal temperature conditions, adjust the pH of the waste water to 12, stir well, then quickly add 2mL of ferrous sulfate solution with a concentration of 100g / L , Stir evenly, and then add 2mL, 1g / L PAM to accelerate flocculation and precipitation. After standing still for 30 minutes, the precipitate in the solution was filtered, and the discharged supernatant was treated waste water. The measured phosphorus concentration was 0.222 mg / L, and the removal rate was 98.3%.

Embodiment 2

[0030] Embodiment 2: the method for removing organophosphorus ATMP in waste water by chemical precipitation method, the steps are as follows:

[0031] Take 100mL of waste water in a beaker, and at room temperature, add 0.08g of solid calcium hydroxide to the waste water to adjust the pH of the waste water to 12. After fully stirring, quickly add 2mL of the existing 250g / L aluminum sulfate solution and stir evenly , and then add 2mL, 1g / L PAM to accelerate flocculation and precipitation. After standing for 30 minutes, the precipitate in the solution was filtered, and the discharged supernatant was treated waste water. The measured phosphorus concentration was 0.201 mg / L, and the removal rate was 98.4%.

Embodiment 3

[0032] Embodiment 3: the method for removing organophosphorus ATMP in waste water by chemical precipitation method, the steps are as follows:

[0033] Take 100mL of waste water in a beaker, and at room temperature, add 0.09g of solid calcium hydroxide to the waste water to adjust the pH of the waste water to 12. After fully stirring, quickly add 2mL of 142g / L polyaluminum chloride solution, stir evenly, and then add 4mL, 1g / L PAM to accelerate flocculation and precipitation. After standing still for 30 minutes, the precipitate in the solution was filtered, and the discharged supernatant was treated waste water. The measured phosphorus concentration was 0.315 mg / L, and the removal rate was 97.5%.

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PUM

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Abstract

The invention relates to a method for removing organophosphorus amino trimethylene phosphonic acid in wastewater with a chemical precipitation method.Calcium hydroxide, an iron salt solution or an aluminum salt solution, and a flocculating agent solution are sequentially added into wastewater with organophosphorus ATMP, the removing rate of organophosphorus can be 97% or above, and the phosphorus concentration in the solution can be reduced to 0.5 mg / L or below.The method is easy and convenient to operate and low in cost, the concentration of total phosphorus of outlet water can be controlled at the low level, and the discharging standard of total phosphorus of effluent water is met.

Description

technical field [0001] The invention relates to a method for removing organophosphorus aminotrimethylene phosphonic acid (ATMP) in waste water by using a chemical precipitation method, and belongs to the field of waste water treatment methods. Background technique [0002] Wastewater usually contains organic phosphate and inorganic phosphate. The removal of inorganic phosphate in wastewater is usually by directly adding chemicals to convert it into insoluble phosphate precipitation, and then it can be removed by solid-liquid separation; while organic phosphate is now The method adopted is to oxidize and degrade it into inorganic phosphate, and then add corresponding chemical agents to remove it. The oxidative degradation methods include photocatalytic oxidative degradation, ozone oxidative degradation, irradiation degradation, microbial degradation, and low-temperature plasma degradation. For example, CN101704606A discloses a treatment method for waste water containing orga...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/66
CPCC02F1/5209C02F1/5245C02F1/56C02F1/66C02F2101/34C02F2101/38
Inventor 高灿柱吉瑞娟李小明王佳佳
Owner SHANDONG UNIV
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