Method for Enhanced Treatment of Organic Wastewater with Fenton-like System Constructed Based on Glyoxylic Acid

A technology for enhanced treatment of organic wastewater, applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve problems such as low iron cycle efficiency, achieve mature preparation process, reduce secondary pollution, and improve efficiency Effect

Active Publication Date: 2021-10-22
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively avoids the problems of easy precipitation of ferric ions, low iron recycling efficiency, and secondary pollution in the Fenton-like reaction, making it more advantageous in the treatment of organic wastewater

Method used

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  • Method for Enhanced Treatment of Organic Wastewater with Fenton-like System Constructed Based on Glyoxylic Acid
  • Method for Enhanced Treatment of Organic Wastewater with Fenton-like System Constructed Based on Glyoxylic Acid
  • Method for Enhanced Treatment of Organic Wastewater with Fenton-like System Constructed Based on Glyoxylic Acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 50 milliliters of organic wastewater containing atrazine (5 mg / liter), add a certain amount of glyoxylic acid, ferric nitrate nonahydrate and hydrogen peroxide to it, so that the final concentrations are 0.3, 0.1 and 2 mmol / liter respectively At this time, the initial pH value of the solution is 3.6, and the mixed solution is placed in a shaker, and shaken at a speed of 200 rpm for 0-180 minutes to complete the treatment of organic wastewater. At the same time, no glyoxylic acid was used as a control experiment, and the results were as follows: figure 1 . from figure 1 It can be seen that after 180 minutes of reaction, Fe(III) / H 2 o 2 The degradation efficiency of atrazine in the system is only 49.2%. When glyoxylic acid is added to the system, the degradation efficiency of atrazine reaches as high as 94.4%.

Embodiment 2

[0028] Atrazine, rhodamine B and ofloxacin were selected as typical pollutants in organic wastewater, and their initial concentrations were 5, 5 and 10 mg / L, respectively. Get 50 milliliters of above-mentioned organic waste water, add a certain amount of glyoxylic acid, ferric nitrate nonahydrate and hydrogen peroxide to it, make its final concentration be 0.3, 0.1 and 2 mmol / liter respectively, and the initial pH value of solution is 3.6 now, The mixed solution is placed in a shaker and shaken at a speed of 200 rpm for 0-180 minutes to complete the treatment of organic wastewater. The results are shown in Table 1. The system can degrade 94.4% and 99.2% of 5 mg / L atrazine and Rhodamine B in 180 minutes, and can degrade 99.9% of 10 mg / L ofloxacin in 120 minutes.

[0029] Pollutants Initial concentration (mg / L) Removal time (min) Removal rate Atrazine 5 180 94.4％ Rhodamine B 5 180 99.2％ Ofloxacin 10 120 99.9％

Embodiment example 3

[0031] Take 50 milliliters of organic wastewater containing atrazine (5 mg / L), add a certain amount of glyoxylic acid, ferric nitrate nonahydrate and hydrogen peroxide to it, wherein the concentration of glyoxylic acid is 0.1, 0.2, 0.3 and 0.4 milliliters respectively mol / L, the concentrations of ferric nitrate and hydrogen peroxide are 0.1 and 2 mmol / L respectively, and the initial pH value of the solution is 3.6 at this time, the mixed solution is placed in a shaker and shaken for 0-180 minutes at a speed of 200 rpm. Complete the treatment of organic wastewater. from figure 2 It can be seen that when the initial concentration of glyoxylic acid is 0.1-0.3 mmol / L, the degradation efficiency of atrazine increases with the increase of the initial concentration of glyoxylic acid. When the initial concentration of glyoxylic acid continued to increase to 0.4 mg / L, the efficiency of the system to degrade atrazine decreased instead.

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Abstract

The present invention specifically relates to a method for enhancing treatment of organic waste water with a Fenton-like system constructed based on glyoxylic acid. The method is as follows: adding ferric salt and glyoxylic acid to the organic waste water to be treated, and controlling the system under acidic conditions , add hydrogen peroxide, place the mixed solution in a shaker, and vibrate at a speed of 200 rpm for 0-180 minutes to complete the treatment of organic wastewater. This method can accelerate the iron cycle in the Fenton-like system and enhance the degradation efficiency of organic pollutants. The invention has the advantages of low cost, non-selectivity, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the field of water pollution control, in particular to a method for constructing a Fenton-like system based on glyoxylic acid to enhance treatment of organic wastewater. Background technique [0002] With the rapid development of industry and agriculture, a large amount of organic wastewater enters natural water bodies, causing serious pollution to the water environment. Organic wastewater usually has the characteristics of complex components, difficult microbial degradation, and strong biological toxicity. Human or poultry ingestion into the body through drinking water and the food chain will lead to metabolic dysfunction, carcinogenic, teratogenic and mutagenic in severe cases, seriously endangering human health. Thoroughly eliminating refractory components and reducing their biological toxicity in wastewater containing organic matter is an important challenge facing the current sewage treatment industry. [0003] Advanced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/70C02F101/30C02F101/14
CPCC02F1/70C02F1/722C02F2101/14C02F2101/203C02F2101/30C02F2209/06C02F2305/026
Inventor 刘伟萧湘如王学东
Owner WENZHOU MEDICAL UNIV
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