A method for treating wastewater containing multiple mixed organic phosphorus scale and corrosion inhibitors

A scale and corrosion inhibitor, organic phosphorus technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of poor organic phosphorus removal effect and unstable operation , Narrow application range and other problems, to achieve good flocculation effect, reduce operation steps, and easy operation

Inactive Publication Date: 2019-01-04
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 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

[0029] Embodiment 1: A kind of wastewater treatment method containing multiple mixed organic phosphorus scale and corrosion inhibitors, the steps are as follows:

[0030] The results of water quality analysis before wastewater treatment showed that the total phosphorus concentration was 3mg / L, and the total concentration of the three organic phosphorus ATMP, HEDP, and PBTCA scale and corrosion inhibitors added was 22mg / L, and the phosphorus content of the three scale and corrosion inhibitors The content ratio is 1:1:1.

[0031] Take 100mL of waste water in a beaker, and at room temperature, add 0.038g of solid calcium hydroxide to the waste water to adjust the pH of the waste water to 12. After fully stirring, quickly add 1mL of the 100g / L ferrous sulfate solution that is currently prepared for use , 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 d...

Embodiment 2

[0032] Embodiment 2: a kind of wastewater treatment method containing multiple mixed organic phosphorus scale and corrosion inhibitors, the steps are as follows:

[0033] The results of water quality analysis before wastewater treatment showed that the total phosphorus concentration was 3mg / L, and the total concentration of the three organic phosphorus ATMP, HEDP, and PBTCA scale and corrosion inhibitors added was 18mg / L, and the phosphorus content of the three scale and corrosion inhibitors The content ratio is 3:2:1.

[0034] Take 100mL of waste water in a beaker, and at room temperature, add 0.04g of solid calcium hydroxide to the waste water to adjust the pH of the waste water to 12. After fully stirring, quickly add 1mL of the 100g / L ferrous sulfate solution that is currently in use. , 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 ...

Embodiment 3

[0035] Embodiment 3: a kind of wastewater treatment method containing multiple mixed organic phosphorus scale and corrosion inhibitors, the steps are as follows:

[0036] The results of water quality analysis before wastewater treatment showed that the total phosphorus concentration was 3mg / L, and the total concentration of the three organic phosphorus ATMP, HEDP, and PBTCA scale and corrosion inhibitors added was 18mg / L, and the phosphorus content of the three scale and corrosion inhibitors The content ratio is 4:1:1.

[0037] Take 100mL of waste water in a beaker, and at room temperature, add 0.042g of solid calcium hydroxide to the waste water to adjust the pH of the waste water to 12. After fully stirring, quickly add 1mL of the 100g / L ferrous sulfate solution that is currently prepared for use , Stir well, and then add 2mL of 1g / L PAM to accelerate flocculation and precipitation. After standing still for 30 minutes, the precipitate in the solution was filtered, and the d...

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Abstract

The invention relates to a method for treating waste water containing multiple mixed organophosphorus scale and corrosion inhibitors.Calcium hydroxide, ferrous sulfate and a flocculating agent solution are sequentially added to the waste water containing ATMP, HEDP and / or PBTCA organophosphorus scale and corrosion inhibitors, the organophosphorus removal rate effect can reach 95% or above, and the phosphorus concentration in the solution can be reduced to 0.2 mg / L or below.According to the method, the chemical reagents are directly added to remove organophosphorus ATMP, HEDP and PBCA, operation is easy and convenient, cost is low, the total phosphorus concentration of effluent can be controlled at a low level, and the effluent total phosphorus emission standard is met.

Description

technical field [0001] The invention relates to a wastewater treatment method containing multiple mixed organic phosphorus scale and corrosion inhibitors, belonging to the field of wastewater 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 organic phosphorus. The process waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/30
CPCC02F1/52C02F1/5245C02F1/56C02F2101/30
Inventor 高灿柱吉瑞娟张晓芸李元镇
Owner SHANDONG UNIV
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