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Photo-Fenton method for artificial sweeteners acesulfame-K and sucralose in mineralized sewage

A technology for sucralose and sewage, which is applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., to achieve the effects of simple equipment, excellent treatment effect, and economical treatment effect.

Active Publication Date: 2019-01-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some current advanced treatment processes, activated carbon adsorption, coagulation precipitation, and chlorination disinfection have only limited removal effects on artificial sweeteners, while UV disinfection only has a removal effect on ACE
The advanced ozone oxidation process can only partially remove artificial sweeteners under the dosage and contact time of the actual sewage treatment plant
There is no systematic research on the removal of artificial sweeteners in actual sewage using UV advanced oxidation process

Method used

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  • Photo-Fenton method for artificial sweeteners acesulfame-K and sucralose in mineralized sewage
  • Photo-Fenton method for artificial sweeteners acesulfame-K and sucralose in mineralized sewage
  • Photo-Fenton method for artificial sweeteners acesulfame-K and sucralose in mineralized sewage

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Embodiment Construction

[0023] The present invention will be further described below in combination with specific embodiments.

[0024] The present embodiment is carried out with the ACE and SUC solution of the initial concentration of 10mg / L of configuration as the object, the optical Fenton method of artificial sweetener acesulfame potassium and sucralose in this mineralized sewage, comprises the following steps:

[0025] (1) The sewage flows to the secondary settling tank through the artesian pipeline by gravity, and the precipitant is put in, and the sedimentation and separation are carried out through the secondary settling tank;

[0026] (2) separate and extract the supernatant after the precipitation of the secondary settling tank, add a pH regulator in the separated supernatant to adjust the pH of the supernatant to be 5, then add 30% mass ratio of H 2 o 2 solution such that H 2 o 2 The molar concentration ratio with the sweetener is 100:1, and then according to H 2 o 2 Molar concentrati...

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Abstract

The invention discloses a photo-Fenton method for artificial sweetening agent acesulfame and sucralose in mineralization sewage. The method includes the following steps that 1, sewage self-flows to a secondary precipitation pool and precipitated and separated; 2, the sewage in the step 1is precipitated and separated to obtain upper-layer sewage, pH is adjusted into 3 to 11 in the upper-layer sewage, a proper amount of H2O2 solution with the mass ratio of 30% is added, then Fe2SO4.7H2O with the molar concentration of 1 / 20 to 1 / 5 of that of the H2O2 is added according to the molar concentration of H2O2, a UV lamp tube is started, starting is carried out, and the mixture is reacted for 10 min to 240 min; 3, water discharged in the step 2 is collected and subjected to result analysis, and then is fed into a contact disinfection pool and reacted with ClO2 and disinfected, and water is discharged out of the contact pool to the municipal sewage pipe network. By means of the photo-Fenton method, the multiple artificial sweetening agents in sewage can be effectively removed.

Description

technical field [0001] The invention relates to the technical field of sewage purification treatment, in particular to a light-Fenton method for removing artificial sweetener acesulfame-K and sucralose in mineralized sewage. Background technique [0002] Artificial sweetener is a substitute for sucrose that is widely used in the food, beverage, pharmaceutical and personal care industries. Since most artificial sweeteners are not degraded by the human body, they enter environmental water bodies in large quantities, and sewage treatment plants is its main gathering place. As a new class of pollutants, there are few studies on its environmental and ecological risks. Existing studies have shown that artificial sweeteners acesulfame-K (ACE) and sucralose (SUC) have harmful effects on medaka, zebrafish, Daphnia magna, and duckweed. Ecotoxicity to aquatic organisms. Therefore, how to effectively remove artificial sweeteners in sewage treatment systems has attracted increasing att...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/52
CPCC02F1/32C02F1/50C02F1/5236C02F1/66C02F1/722C02F9/00C02F2305/026
Inventor 耿金菊任宇航任洪强许柯丁丽丽
Owner NANJING UNIV