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Flocculation and microwave-Fenton technology method for deep treatment of organic wastewater

A technology of organic wastewater and advanced treatment, applied in water/sewage treatment, water treatment parameter control, special compound water treatment, etc. It can solve the problems of high pollutant concentration, refractory degradation, poor biodegradability, etc., and achieve good treatment effect. , the effect of short reaction period and simple reaction process

Inactive Publication Date: 2018-11-06
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Organic wastewater is a typical refractory toxic organic industrial wastewater with high concentration of pollutants and poor biodegradability

Method used

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  • Flocculation and microwave-Fenton technology method for deep treatment of organic wastewater
  • Flocculation and microwave-Fenton technology method for deep treatment of organic wastewater
  • Flocculation and microwave-Fenton technology method for deep treatment of organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, Fe 2+ / H 2 o 2 The mass ratio is 1:4.6, and the organic wastewater is treated by flocculation + microwave-Fenton method.

[0026] Take 200ml of raw water in a beaker, add 350mg / L PAC solution, stir rapidly for 1 minute, then add 3mg / L PAM solution, stir slowly for 1 minute. Let it sit for a while. Precipitate, separate, and take the supernatant.

[0027] Adjust the initial pH of the supernatant to 4, then add FeSO with a ratio of 1:4.6 4 ·7H 2 O and H 2 o 2 ; Microwave for 20min. Adjust the pH of the wastewater to 6-7, filter the supernatant to measure the COD value and chromaticity. The organic wastewater sample treated in this embodiment has a COD removal rate of 76.5% and a chroma removal rate of 83.6%.

Embodiment 2

[0029] In this example, Fe 2+ / H 2 o 2 The mass ratio is 1:4.6, and the organic wastewater is treated by flocculation + microwave-Fenton method.

[0030] Take 200ml of raw water in a beaker, add 300mg / L PAC solution, stir rapidly for 1 minute, then add 5mg / L PAM solution, stir slowly for 1 minute. Let it sit for a while. Precipitate, separate, and take the supernatant.

[0031] Adjust the initial pH of the supernatant to 4, then add FeSO with a ratio of 1:4.6 4 ·7H 2 O and H 2 o 2 ; Microwave for 20min. Adjust the pH of the wastewater to 6-7, filter the supernatant to measure the COD value and chromaticity.

[0032] The organic wastewater sample treated in this embodiment has a COD removal rate of 80.5% and a chroma removal rate of 81.3%.

Embodiment 3

[0034] In this example, Fe 2+ / H 2 o 2 The mass ratio is 1:4.6, and the organic wastewater is treated by flocculation + microwave-Fenton method.

[0035] Take 200ml of raw water in a beaker, add 300mg / L PAC solution, stir rapidly for 1 minute, then add 5mg / L PAM solution, stir slowly for 1 minute. Let it sit for a while. Precipitate, separate, and take the supernatant.

[0036] Adjust the initial pH of the supernatant to 4, then add FeSO with a ratio of 1:4.6 4 ·7H 2 O and H 2 o 2 ; Microwave for 25 minutes. Adjust the pH of the wastewater to 6-7, filter the supernatant to measure the COD value and chromaticity.

[0037] The organic wastewater sample treated in this embodiment has a COD removal rate of 80.3% and a chroma removal rate of 88.4%.

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Abstract

The invention relates to a flocculation and microwave-Fenton technology method for deep treatment of organic wastewater. The technology comprises the following steps of firstly, flocculating; then, treating the organic wastewater by a microwave-assisted Fenton method; adding a fluocculant and a flocculation additive into the secondary settling water, and flocculating; adjusting the initial pH (potential of hydrogen) value, adding FeSO4*7H2O (ferrous sulfate heptahydrate) and H2O2 (hydrogen peroxide) into the secondary settling water, and reacting for a period of time by microwaves; adjusting the pH value of the wastewater to 6 to 7, filtering, obtaining a clear solution of the wastewater and measuring the COD (chemical oxygen demand) value and chroma. The technology has the advantages thatwhen the organic wastewater is treated by the method, the reaction process is simple, and the process is easy to control; the reaction cycle is short, the treatment effect is better, and the drainagestandard can be reached.

Description

technical field [0001] The invention relates to a flocculation+microwave-Fenton process method for advanced treatment of organic wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Organic wastewater is a typical refractory toxic organic industrial wastewater with high concentration of pollutants and poor biodegradability. It mainly comes from the condensed water formed by production water and steam in chemical enterprises and organic processes, and is the wastewater generated in the process of refining, washing, decolorizing, spraying and recycling of chemical products. Its components are relatively complex, including phenolic compounds, ammonia nitrogen, and many polycyclic aromatic hydrocarbons and heterocyclic compounds that are difficult to biodegrade, such as indole, naphthalene, quinoline, etc., which are harmful to the environment and are difficult to treat. Industrial wastewater . [0003] The Fenton oxidation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/30
CPCC02F1/001C02F1/302C02F1/5245C02F1/56C02F1/66C02F1/722C02F1/725C02F9/00C02F2101/30C02F2209/06C02F2209/08C02F2305/026
Inventor 徐文媛秦晓丹麦荣王林平况熙颜菲
Owner EAST CHINA JIAOTONG UNIVERSITY
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