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A kind of recovery process of surfactant in waste water

A technology for surfactants and wastewater, applied in the direction of water pollutants, detergent compounding agents, detergent compositions, etc., can solve the problems of direct discharge of wastewater, achieve high recycling rate, solve environmental problems, and low oil content Effect

Active Publication Date: 2022-03-22
广东丽臣奥威实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a recovery process for surfactants in wastewater, which is simple to operate and has a high recycling rate, and can solve the environmental problems caused by the direct discharge of wastewater containing surfactants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of recovery process of surfactant in waste water, comprises the following steps:

[0025] S1 Put the surfactant-containing wastewater into the reaction container. The surfactant content in the wastewater exceeds 20%. Since the wastewater may contain a small amount of O / W emulsion, add a small amount of SP-type demulsifier and stir for 15-20 minutes. After destroying the structure of the O / W emulsion, the oil solution floats up and floats on the upper layer of the wastewater due to its low density, and then stands still for 2~5 hours, then separates the liquid to remove the upper layer of the oil solution, and uses a membrane filter to remove large particles in the wastewater Precipitate impurities to obtain primary treatment liquid;

[0026] S2 Transfer the primary treatment liquid to the liquid tank of the ultrasonic equipment, and add a small amount of hydrogen peroxide. Hydrogen peroxide has a bactericidal effect and is used to kill most of the bacteria in the...

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Abstract

The invention provides a process for recovering surfactants in wastewater, comprising the following steps: placing wastewater containing surfactants in a reaction vessel, adding a demulsifier to stir and mix, standing still, removing the upper oil solution, and removing precipitated impurities ; Transfer to the liquid tank of the ultrasonic equipment, and add a small amount of hydrogen peroxide for ultrasonic oscillation; The foam layer on the surface is obtained to obtain the secondary treatment liquid; transfer to the evaporative concentrator for evaporation and concentration to obtain the concentrated liquid; transfer the concentrated liquid to the stirring container, add calcium hypochlorite and preservative, and stir to obtain the cleaning liquid. The recovery process of the surfactant in the waste water of the invention has simple operation and high recycling rate, and can solve the environmental problem caused by the direct discharge of the waste water containing the surfactant.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a recovery process for surfactants in wastewater. Background technique [0002] Surfactants are called "industrial monosodium glutamate" and are widely used in various fields. Due to the large amount of surfactant used, some factories discharge it directly into the river. The surfactant discharged into the river tends to generate foam, which blocks the oxygen exchange between the water body and the air, causing the water body to stink. In order to eliminate the environmental problems caused by the discharge of surfactants, membrane treatment technology is now mainly used to recover surfactants in wastewater. However, the recovery effect is not satisfactory, and the recovered surfactant has many impurities and is difficult to reuse. Contents of the invention [0003] In view of the above problems, the present invention provides a process for recovering surfactants in waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C11D3/04C11D3/48C02F101/30
CPCC02F9/00C11D3/046C11D3/48C02F2101/301C02F1/001C02F1/40C02F1/36C02F1/722C02F1/24C02F1/66C02F1/048
Inventor 林启松
Owner 广东丽臣奥威实业有限公司