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Method of phosphorus removal in high-phosphate-content industrial wastewater and phosphorus resource recovery of high-phosphate-content industrial wastewater

A technology of industrial sewage and recovery methods, applied in water/sewage treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve problems such as unstable operation of phosphorus removal, and achieve the effect of recycling waste resources for environmental protection

Inactive Publication Date: 2017-03-08
武汉青江化工黄冈有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides a method for phosphorus removal from high-phosphorus industrial sewage and its recovery of phosphorus resources, which solves the problems of phosphorus removal and phosphorus resource recovery and utilization in phosphorus-containing industrial sewage, domestic sewage and other sewage, and is especially suitable for the removal of phosphorus in the field of high-phosphorus sewage. Unstable Phosphorus Operation and Improvement of Phosphorus Reuse Value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] at 1m 3 Add about 12% sodium chloride, a small amount of 3,4-methoxybenzaldehyde, o-methoxybenzene, N-methylformanilide, N-methylaniline, toluene and other organic ingredients into the homemade blender 500L of high-phosphorus sewage with a total phosphorus of about 15145mg / L and a COD of about 16498mg / L. Proceed as follows:

[0030] (1) The content of total phosphorus and orthophosphoric acid in sewage was determined by the international standard method.

[0031] (2) Use sulfuric acid to adjust the pH value of the sewage to between 4.0 and 5.0.

[0032] (3) Then add hydrogen peroxide according to the difference between the total phosphorus in the sewage and the phosphorus in orthophosphoric acid, and stir and oxidize for 30~45min.

[0033] (4) Use caustic soda to adjust the pH of the oxidized sewage to between 8.0 and 10.0.

[0034] (5) According to the total phosphorus and calcium molar ratio of 1:1.5, add the inorganic-organic composite chemical phosphorus removal...

Embodiment 2

[0036] at 1m 3 Add about 12% sodium chloride, a small amount of 3,4-methoxybenzaldehyde, o-methoxybenzene, N-methylformanilide, N-methylaniline, toluene and other organic ingredients into the homemade blender 500L of high-phosphorus sewage with a total phosphorus of about 15146mg / L and a COD of about 16498mg / L. Proceed as follows:

[0037] (1) The content of total phosphorus and orthophosphoric acid in sewage was determined by the international standard method.

[0038] (2) Use sulfuric acid to adjust the pH value of the sewage to 4.0~5.0.

[0039] (3) Then add hydrogen peroxide according to the difference between the total phosphorus in the sewage and the phosphorus in orthophosphoric acid, stir and oxidize for 30~45min.

[0040] (4) Use caustic soda to adjust the pH of the oxidized sewage to between 9.0 and 11.0.

[0041](5) According to the molar ratio of total phosphorus to calcium of 1:1.8, add an inorganic-organic composite chemical phosphorus removal system prepared...

Embodiment 3

[0043] at 1m 3 Add about 12% sodium chloride, a small amount of 3,4-methoxybenzaldehyde, o-methoxybenzene, N-methylformanilide, N-methylaniline, toluene and other organic ingredients into the homemade blender 500L of high-phosphorus sewage with a total phosphorus of about 15168mg / L and a COD of about 16513mg / L. Proceed as follows:

[0044] (1) The content of total phosphorus and orthophosphoric acid in sewage was determined by the international standard method.

[0045] (2) Use sulfuric acid to adjust the pH value of the sewage to 6.0~7.0.

[0046] (3) Then add hydrogen peroxide and ferrous sulfate according to the difference between the total phosphorus in the sewage and the phosphorus in orthophosphoric acid, and let the gas flow for 30~45min.

[0047] (4) Use caustic soda to adjust the pH of the oxidized sewage to between 10.0 and 11.0.

[0048] (5) According to the molar ratio of total phosphorus to calcium of 1:1.8, add an inorganic-organic composite chemical phosphor...

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Abstract

This invention provides a method of phosphorus removal in high-phosphate-content industrial wastewater and phosphorus resource recovery of high-phosphate-content industrial wastewater, solves the problems of phosphorus removal in industrial wastewater, domestic sewage and other types of sewage and phosphorus resource recovery, and is particularly applicable to the field of the high-phosphate-content industrial wastewater. The method comprises the following steps: uniformly mixing 0 to 0.5 part of inorganic electrolyte, 0 to 2.5 parts of a water-soluble high-molecular polymer, 5 to 10 parts of calcium hydroxide (or calcium oxide) and 87 to 95 parts of soluble calcium salt in percentage by weight to obtain an inorganic-organic composite phosphorus removal chemical reagent; and adjusting the PH value of the wastewater with acid and alkali, oxidizing non-orthophosphate ions in the wastewater with an oxidant to adjust the acidity of the wastewater, and adding the inorganic-organic composite phosphorus removal chemical reagent to precipitate the phosphorus in the wastewater. The total amount of phosphorus in the wastewater is reduced from about 15500 mg / L to 5 mg / L or below. The main component of a filter cake is hydroxyl calcium phosphate, and the phosphorus content reaches 15 percent or above; and the filter cake can be used for preparing phosphoric acid or phosphate fertilizer.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for removing phosphorus from high-phosphorus organic industrial sewage and recovering phosphorus resources, which is applicable to the removal of phosphorus and the recovery and utilization of phosphorus resources in phosphorus-containing industrial sewage, domestic sewage and other sewage , especially suitable for the field of high phosphorus sewage. [0003] Background technique: [0004] Phosphorus is an indispensable nutrient factor for the growth of animals and plants, and it is almost a one-way cycle in nature. At present, the human demand for phosphorus resources is constantly increasing, and the consumption of phosphate in the world is increasing by 215% annually. By 2050, the consumption of phosphate in the world will reach 100 million tons. It is estimated that the world's phosphate rock reserves can only last for about 100 years, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B25/32
CPCC02F1/722C01B25/32C02F1/001C02F1/58C02F1/66C02F1/72C02F2305/026
Inventor 欧阳兆辉朱传胜周建锋金友谊陈扬简理张恒明
Owner 武汉青江化工黄冈有限公司
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