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A sewage Fenton treating agent

A sewage and treatment method technology, applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of low utilization rate, large dosage of medicine, waste of medicine, etc., and reduce treatment Cost, low cost, waste reduction effect

Inactive Publication Date: 2016-03-16
CANGZHOU HONGHAI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The Fenton method has incomparable advantages over the general chemical oxidation method in the treatment of refractory organic wastewater. The traditional Fenton treatment is to directly treat the Fenton reaction reagent (ferrous salt and strong oxidizing agent such as H 2 o 2 or HCL0) into the sewage, but in the current use of Fenton agents there is a large amount of medication, H 2 o 2 The utilization rate of the waste water is not high, the amount of sludge produced in the process of wastewater treatment is large, and the residual H 2 o 2 More, resulting in a certain waste of medicine

Method used

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Experimental program
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preparation example Construction

[0016] The invention provides a kind of sewage Fenton treatment agent, and its preparation method specifically comprises the following steps:

[0017] Step 1. Adjust the pH value of the waste water to be tested to 3-6, wherein an acidic solution or an alkaline solution is used to adjust the pH value of the waste water. Specifically, the acidic solution is sulfuric acid or hydrochloric acid, and the alkaline solution is sodium hydroxide or lime;

[0018] Step 2, adding FeSO to wastewater 4 ·7H 2 O, mixed and stirred for 3-10min, wherein, FeSO 4 ·7H 2 O and H 2 o 2 The ratio is 2.5-4.5:1. For COD (Chemical OxygenDemand is a chemical method to measure the amount of reducing substances that need to be oxidized in the water sample.) Higher wastewater can appropriately increase FeSO 4 ·7H 2 O and H 2 o 2 The dosing ratio.

[0019] Step 3, add H 2 o 2 Stir and mix;

[0020] Step 4. After an interval of 15 minutes, add FeSO again 4 ·7H 2 O, stir for 3-10min;

[0021] S...

Embodiment 1

[0031] Take the coking wastewater whose COD is 230mg / L and pH value is 4.5.

[0032] Step 1. The PH value of the waste water is within 3-6, and FeSO is added directly 4 ·7H 2 O700mg / L, stirring for 10min;

[0033] Step 2, add H 2 o 2 400mg / L, stir evenly, let stand for 15min;

[0034] Step 3. Add FeSO again 4 ·7H 2 O300mg / L, stirring for 10min;

[0035] Step 4. Adjust the pH value to 8.0 with sodium hydroxide, and ferric iron flocs appear, and add 300 mg / L of polyferric sulfate and 1 mg / L of PAM. Stir evenly, let it stand for 40min, and take the supernatant for determination.

[0036] Test results: The COD measurement result of the supernatant was 90.92mg / L, and the removal rate was 60.47%.

[0037] In order to compare, the inventor selects the same sewage to carry out the traditional treatment method, specifically:

[0038] Take the coking wastewater whose COD is 230mg / L and pH value is 4.5.

[0039] Step 1, add H 2 o 2 400mg / L, stir evenly, let stand for 15min;...

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Abstract

A sewage Fenton treating agent is disclosed. A preparing method of the agent includes 1) adjusting the pH value of wastewater to be measured to 3-6, 2) adding FeSO4.7H2O into the wastewater, and mixing by stirring for 3-10 min, 3) adding H2O2, and fully mixing by stirring, 4) after 15 min, adding the FeSO4.7H2O again, and stirring for 3-10 min, and 5) adjusting the pH value to 7.5-8.0 and adding a flocculant. The FeSO4.7H2O is added in batches, thus increasing capability of catalyzing organic compounds, increasing the treatment efficiency and reducing the treatment cost. The agent is wide in application range, high in application capability and suitable for various kinds of wastewater difficult to treat, largely reduces COD, chromaticity, turbidity, and the like of the wastewater, can treat wastewater of the coking industry, the printing and dyeing industry, the pharmaceutical industry, and the like, is beneficial to other subsequent treatment steps, and allows the wastewater to meet local industrial emission standards. The agent is simple in process, high in efficiency and low in cost, so that the agent has a wide market prospect.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a sewage Fenton (Fenton) treatment agent with a small dosage of agents, a wide range of adaptability to acidity and good COD removal effect. Background technique [0002] The Fenton method has incomparable advantages over the general chemical oxidation method in the treatment of refractory organic wastewater. The traditional Fenton treatment is to directly treat the Fenton reaction reagent (ferrous salt and strong oxidizing agent such as H 2 o 2 or HCL0) into the sewage, but in the current use of Fenton agents there is a large amount of medication, H 2 o 2 The utilization rate of the waste water is not high, the amount of sludge produced in the process of wastewater treatment is large, and the residual H 2 o 2 More, resulting in a certain waste of medicine. Therefore, it has been developed with less reagent consumption, high use efficiency, and less sludge production, H 2 o 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F9/04C02F1/52C02F1/66C02F1/56
CPCC02F1/722C02F1/52C02F1/56C02F1/66C02F9/00C02F2305/026
Inventor 马海青陈连生张卫东郑文华王栓龙
Owner CANGZHOU HONGHAI CHEM CO LTD