Method for efficiently treating salt-containing organic wastewater and application of method

A high-efficiency technology for organic wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as endangering human health, difficult to degrade by biochemical methods, and difficult to biodegrade. Achieve the effect of saving production resources, effectively recycling, and reducing COD value

Active Publication Date: 2015-11-25
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (4) It is difficult to biodegrade, because 2-naphthylamino-3,6,8-trisulfonic acid has a stable naphthalene ring structure, and the molecule contains three sulfonic acid functional groups that play a passivation role, and the molecular structure is very stable. The biodegradability is extremely poor, and it is difficult to degrade by biochemical methods;
[0011] (5) High toxicity. 2-Naphthylamine-3,6,8-trisulfonic acid belongs to condensed ring aromatic hydrocarbons, and the molecule contains toxic amino groups, which has strong biological toxicity. If it is directly discharged without proper treatment, Will seriously pollute the water environment and endanger human health
Due to the excess output of sodium sulfate, the high cost of concentrated salt steaming, and the poor quality of sodium sulfate obtained, the application range is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] H acid wastewater, black, COD=26030mg / L, pH=2.

[0043] (1) Filtration: Filtrate H acid wastewater to remove suspended solids and iron, calcium, magnesium and other substances.

[0044] (2) Diffusion dialysis: Utilize anion exchange membrane diffusion dialysis to process the filtrate, obtain sulfuric acid and salt-containing organic matter solution through dialysis, and the recovery rate of sulfuric acid is 90%.

[0045] (3) Bipolar membrane treatment: Utilize bipolar membrane to process saline organic matter solution, obtain alkaline solution and massfraction be the sulfuric acid of 10%, the massfraction of sodium hydroxide in alkaline solution is 4%, the massfraction of ammonia 4%. The reaction conditions of the bipolar membrane: the single membrane voltage is 2.5V, and the current density is 600A / m 2 , the temperature is 30°C, and the electrode solution is sodium sulfate solution with a mass fraction of 5%.

[0046] (4) Wet oxidation: the pH of the solution containi...

Embodiment 2

[0050] H acid wastewater, black, COD=26030mg / L, pH=2.

[0051] (1) Filtration: Filtrate H acid wastewater to remove suspended solids and iron, calcium, magnesium and other substances.

[0052] (2) Diffusion dialysis: the filtrate is treated by anion exchange membrane diffusion dialysis, and sulfuric acid and salt-containing organic solution are obtained by dialysis.

[0053] (3) Bipolar membrane treatment: Utilize bipolar membrane to process saline organic matter solution, obtain alkaline solution and the sulfuric acid that massfraction is 9%, the massfraction of sodium hydroxide in alkaline solution is 3.9%, the massfraction of ammonia 3.5%. The reaction conditions of the bipolar membrane: the single membrane voltage is 2V, and the current density is 400A / m 2 , the temperature is 30°C, and the electrode solution is 5% sodium sulfate solution.

[0054] (4) Wet oxidation: The pH of the solution containing organic matter obtained after bipolar membrane treatment is adjusted t...

Embodiment 3

[0058] H acid wastewater, black, COD=130000mg / L, pH=1.

[0059] (1) Filtration: Filtrate H acid wastewater to remove suspended solids and iron, calcium, magnesium and other substances.

[0060] (2) Diffusion dialysis: use anion exchange membrane diffusion dialysis to treat the filtrate, and obtain sulfuric acid and salt-containing organic solution through diffusion dialysis.

[0061] (3) Bipolar membrane treatment: Utilize bipolar membrane to process saline organic matter solution, obtain alkaline solution and the sulfuric acid that massfraction is 11%, the massfraction of sodium hydroxide in alkaline solution is 4.5%, the massfraction of ammonia 4.5%. The reaction conditions of the bipolar membrane: the single membrane voltage is 2.5V, and the current density is 600A / m 2 , the temperature is 30°C, and the electrode solution is 5% sodium sulfate solution.

[0062] (4) Wet oxidation: adjust the pH of the organic-containing solution obtained after the bipolar membrane treatme...

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PUM

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Abstract

The invention discloses a method for efficiently treating salt-containing organic wastewater and application of the method. The method comprises the following steps: (1) filtering the salt-containing organic wastewater, and performing diffusion dialysis on obtained filtrate to obtain acid solution or alkaline solution and salt-containing organic matter solution; (2) treating the salt-containing organic solution by utilizing a bipolar membrane to obtain organic matter-containing solution, acid solution and alkaline solution; (3) performing wet oxidation on the organic matter-containing solution to obtain treatment liquid; (4) performing aftertreatment on the treatment liquid to obtain water. According to the method for efficiently treating the salt-containing organic wastewater, disclosed by the invention, not only can the COD (chemical oxygen demand) value of the wastewater be obviously reduced but also matter in the wastewater can be effectively recycled.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for efficiently treating salt-containing organic wastewater and its application. Background technique [0002] In the chemical production process, it is inevitable to produce various salt-containing organic wastewater. In order to meet the needs of environmental protection, these wastewaters need to be treated to meet the discharge standards. [0003] Sulfonated tuburic acid, also known as aniline-2,5-disulfonic acid (2-aminoterephthalene disulfonic acid), is a dye intermediate, mainly used in the manufacture of direct light fast blue RGL, reactive turquoise blue KGL, Active bright yellow and active orange, fluorescent whitening agent, etc. Sulfonated tunic acid wastewater contains about 28% acid and about 10% sodium chloride, and the existing wastewater treatment methods cannot effectively recycle the acid therein. [0004] G salt is a white needle-like c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
Inventor 张云保徐雷金胡启木张静
Owner ZHEJIANG QICAI ECO TECH CO LTD
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