Ferrous ion reduction and catalytic oxidation cooperation for reinforcing waste water biological treatment technology

A technology of catalytic oxidation and biological treatment, applied in the direction of reducing water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc. Reduction of pollutants is not obvious and other problems, to achieve the effect of improving wastewater biological treatment effect, improving catalytic oxidation efficiency, and saving economic costs

Active Publication Date: 2013-07-31
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of industrial wastewater is complex, containing not only easily reducible oxidative pollutants, but also a variety of refractory biodegradable pollutants that cannot be reduced. FHC can effectively remove oxidative pollutants, and the removal of refr

Method used

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  • Ferrous ion reduction and catalytic oxidation cooperation for reinforcing waste water biological treatment technology
  • Ferrous ion reduction and catalytic oxidation cooperation for reinforcing waste water biological treatment technology
  • Ferrous ion reduction and catalytic oxidation cooperation for reinforcing waste water biological treatment technology

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Taking the treatment of printing and dyeing wastewater as an example, the implementation steps are further explained.

[0027] Step 1: Weigh 27.8g of FeSO 4 ·7H 2 O dissolve it in 100mL of water without dissolved oxygen, gradually add 5mol / L anaerobic sodium hydroxide solution to the above solution, stir while adding, the molar ratio of ferrous ion and hydroxide is 0.58, and generate FHC .

[0028] Step 2: Take 20L of actual printing and dyeing wastewater and put it into a reactor (referred to as reactor A). Add the FHC solution that has been prepared in reactor A, make Fe 2+ The content is about 50 mg / L, and after stirring for 20 minutes, it precipitates, and the supernatant is transferred to a Fenton-like oxidation pool (referred to as reactor B).

[0029] Step 3: add sulfuric acid slag (dosing ratio: 10mg / L) and hydrogen peroxide (dosing ratio: 0.01ml / L) to reactor B, and return the sludge in reactor A to reactor B , the reflux ratio is 1% (the ratio of the volu...

Embodiment 2

[0032] Treatment of printing and dyeing wastewater

[0033] I: Synergistic enhancement of ferrous reduction and catalytic oxidation for wastewater biological treatment

[0034] Step 1: Take 27.8g of FeSO 4 ·7H 2O dissolve it in 100mL of water without dissolved oxygen, gradually add 5mol / L anaerobic sodium hydroxide solution to the above solution, stir while adding, the molar ratio of ferrous ion and hydroxide is 0.8, and generate FHC .

[0035] Step 2: Take 25L of actual printing and dyeing wastewater and put it into reactor A, add the prepared FHC solution to make Fe 2+ The mass concentration is 100mg / L. Stir the reaction for 60 minutes, precipitate for 30 minutes, and transfer the supernatant to reactor B.

[0036] The third step: add sulfuric acid slag (dosing ratio is 50mg / L) and hydrogen peroxide (dosing ratio is 0.1ml / L) in reactor B, and return the sludge in reactor A to reactor B, The reflux ratio was 2%, the reaction was stirred for 60 minutes, and the precipita...

Embodiment 3

[0043] Treatment of Mixed Wastewater of Nitrobenzene Wastewater and Printing and Dyeing Wastewater

[0044] I: Synergistic enhancement of ferrous reduction and catalytic oxidation for wastewater biological treatment

[0045] The first step: take 12.7g of FeCl 2 Dissolve it in 100mL of water without dissolved oxygen, gradually add 5mol / L anaerobic sodium hydroxide solution to the above solution, stir while adding, the molar ratio of ferrous ion and hydroxide is 0.3, and generate FHC.

[0046] Step 2: Take 25L of mixed waste water and put it into reactor A, add FHC solution to make Fe 2+ The mass concentration is 200mg / L. Stir the reaction for 40 minutes, precipitate for 20 minutes, and transfer the supernatant to reactor B.

[0047] The third step: add sulfuric acid slag (dosing ratio is 50mg / L) and hydrogen peroxide (dosing ratio is 0.1ml / L) in reactor B, and return the sludge in reactor A to reactor B, The reflux ratio was 3%, the reaction was stirred for 120 minutes, and...

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Abstract

The invention relates to ferrous ion reduction and catalytic oxidation cooperation for reinforcing waste water biological treatment technology, and is suitable for processing difficultly degraded industrial waste water, the waste water biological treatment technology comprises four steps of preparation of a structural state ferrous compound, reduction treatment, catalytic oxidation treatment and biochemical treatment. Compared with the prior art, the ferrous reduction function can be fully performed, simultaneously, the catalysis performance of the ferrous reduction product can be further used, a few of hydrogen peroxide and a reinforcement material can be added, catalytic oxidation is carried out to remove a part of difficultly degraded pollutant, waste water biodegradability is further enhanced, the biological treatment technology can be coupled, so that the thorough treatment of waste water is realized. The waste water biological treatment technology has the advantages of wide water quality adaptation scope, high efficiency economy and simple utility.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a synergistically enhanced wastewater biological treatment process for ferrous reduction and catalytic oxidation, which is suitable for the treatment of refractory industrial wastewater. Background technique [0002] In recent years, my country's chemical industry has developed rapidly and has made important contributions to the development of the national economy. At the same time, the discharge of various chemical wastewater has also increased significantly. The organic chemical industry, especially the petrochemical, papermaking, tanning, coking, printing and dyeing industries, has also produced a large amount of refractory wastewater during the rapid development. This type of wastewater generally has the typical characteristics of high concentration, complex composition, and strong toxicity. Low biochemical (BOD 5 / COD value is generally lower tha...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/70C02F1/72
Inventor 吴德礼王权民冯勇马鲁铭
Owner TONGJI UNIV
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