Method for treating alkali high-concentration organic waste water by using Fenton process

A technology of organic waste water and high concentration, applied in the field of chemical industry

Inactive Publication Date: 2012-12-26
青岛海安生物环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a method for treating alkaline high-concentration organic wastewater by a F...

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  • Method for treating alkali high-concentration organic waste water by using Fenton process

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Embodiment 1

[0031] A method for treating alkaline high-concentration organic wastewater by a Fenton process, comprising the following steps:

[0032] 1) The alkaline high-concentration organic waste water is injected into the reactor, and the 100L mass concentration is 40% H 2 SO 4 The solution adjusts the pH of the alkaline high-concentration organic wastewater to be 4.5;

[0033] 2) Put the alkaline high-concentration organic waste water into the medicine-dissolving tank, stir and dissolve the solid FeSO at 25°C 4 ·7H 2 O20min, backflow into the reactor;

[0034] 3) Adjust pH to 2.5;

[0035] 4) After stirring the reaction for 0.8h, adjust the pH to 7.5;

[0036] 5) Add PAM with a mass concentration of 0.05%, dropwise for 4min at a rate of 900L / h, and continuously stir during the dropwise addition, and then stand for settling for 25min;

[0037] 6) The turbid liquid obtained after standing and settling is directly injected into a filter press for processing.

[0038] As a preferr...

Embodiment 2

[0042] A method for treating alkaline high-concentration organic wastewater by a Fenton process, comprising the following steps:

[0043] 1) The alkaline high-concentration organic waste water is injected into the reactor, and the 115L mass concentration is 50% H 2 SO 4 The pH of the solution adjusting the alkaline high-concentration organic waste water is 5;

[0044] 2) Put the alkaline high-concentration organic waste water into the medicine-dissolving tank, stir and dissolve the solid FeSO at 30°C 4 ·7H 2 O25min, backflow into the reactor;

[0045] 3) adjust pH to be 3;

[0046] 4) After stirring the reaction for 1h, adjust the pH to 8;

[0047] 5) Add PAM with a mass concentration of 0.1%, dropwise for 5min at a rate of 1080L / h, and continuously stir during the dropwise addition, and then stand for settling for 30min;

[0048] 6) The turbid liquid obtained after standing and settling is directly injected into a filter press for processing.

[0049] Described adjusti...

Embodiment 3

[0053] A method for treating alkaline high-concentration organic wastewater by a Fenton process, comprising the following steps:

[0054] 1) The alkaline high-concentration organic waste water is injected into the reactor, and 130L mass concentration is 60% H 2 SO 4 The solution adjusts the pH of the alkaline high-concentration organic wastewater to be 5.5;

[0055] 2) Put the alkaline high-concentration organic waste water into the medicine-dissolving tank, stir and dissolve the solid FeSO at 35°C 4 ·7H 2 O30min, backflow into the reactor;

[0056] 3) Adjust pH to 3.5;

[0057] 4) After stirring the reaction for 1.2h, adjust the pH to 8.5;

[0058] 5) PAM with a mass concentration of 0.15% was added, dripped at a rate of 1260 L / h for 6 min, and kept stirring during the dripping process, and then allowed to settle for 35 min;

[0059] 6) The turbid liquid obtained after standing and settling is directly injected into a filter press for processing.

[0060] Described adj...

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Abstract

The invention provides a method for treating alkali high-concentration organic waste water by using a Fenton process. The method comprises the following steps of: injecting the alkali high-concentration organic waste water into a reaction kettle, and adjusting the pH value of the alkali high-concentration organic waste water to 4.5-5.5 by using 40-60% of H2SO4 with the mass concentration of 100-130L; draining the alkali high-concentration organic waste water in a medical dissolving pond, stirring and dissolving solid FeSO4.7H2O2 at 25-35 DEG C for 20-30min, and reflowing to the reaction kettle; adjusting the pH value to 2.5-3.5; stirring and reacting for 0.8-1.2h, and adjusting the pH value to 7.5-8.5; adding PAM (polyacrylamide) with the mass concentration of 0.05-0.15%, dropping with the rate of 900-1260L/h for 4-6min, stirring continuously, and then standing and settling for 25-35min; directly pumping the turbid solution obtained after the standing and settling treatments in a filter press for later treatment. With the adoption of the method, the consumption of tap water is reduced and the medical dissolving time is shortened.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for treating alkaline high-concentration organic waste water. Background technique [0002] The traditional Fenton process is often used to treat acidic wastewater with the following disadvantages: [0003] The optimal reaction pH of the Fenton process is 3, while the existing process is to adjust the initial pH to about 3, and then add hydrogen peroxide, resulting in a pH much lower than 3 in the final reaction, showing strong acidity and reducing the treatment effect. [0004] There are two ways of adding iron in the traditional Fenton process: one is to directly add solids. Since ferrous sulfate is very easy to combine with water to form crystalline compounds, the solid particles are very large. The body is large, the stirring is insufficient, the solid particles are deposited on the bottom of the pool, and it is not easy to dissolve, which leads to waste o...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/66C02F101/30
Inventor 徐云龙
Owner 青岛海安生物环保有限公司
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