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Wastewater treatment method

A treatment method and wastewater technology, applied in the direction of oxidized water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve the problems of poor wastewater treatment effect, troublesome catalyst replacement, unstable treatment effect, etc.

Active Publication Date: 2014-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the prior art that the treatment effect of wastewater is not good, the treatment effect is unstable, and the replacement of the catalyst is troublesome, and to provide a method that can effectively and stably treat the wastewater, and can effectively improve the reliability of the wastewater. biochemical method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0033] The waste water treated in this embodiment is high-concentration waste water from an oil refinery.

[0034] Adjust the pH value of the wastewater to be treated to 6 with sulfuric acid aqueous solution (mass percentage concentration is 98%), and the said wastewater and oxidant hydrogen peroxide (mass percentage concentration is 30%) (hydrogen peroxide consumption is 400mg / L) from the Ferroferric oxide particles (120 microns in particle diameter) are continuously introduced at the bottom of the magnetically stabilized reactor (the filling amount of ferroferric oxide particles in the reactor is 65% of the reactor volume, and the residence time of the wastewater is 20 minutes), Feed current into the coil wound on the periphery of the reactor, so that the magnetic field strength of the applied electromagnetic field is 300 Oersted, so that the ferric oxide particl...

Embodiment 2

[0042] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0043] The wastewater treated in this embodiment is wastewater from a chemical plant.

[0044] The method for preparing the magnetic catalyst particles used in this example is as follows: 70% by weight of iron powder (with a powder diameter of 2-10 microns), 25% by weight of copper oxide (with a powder diameter of 2-10 microns) and 5 wt% % titanium dioxide (powder diameter 2-10 microns) mixed evenly and then sintered at 500°C for 2 hours to obtain catalyst particles with a particle diameter of 150 microns.

[0045] The pH value of the wastewater to be treated is adjusted to 6 with aqueous sulfuric acid (mass percentage concentration is 98%), and the waste water and oxidant hydrogen peroxide (mass percentage concentration is 30%) (hydrogen peroxide consumption is 400mg / L) from the The bottom of the magnetically stable bed reactor equipped with the above-mentioned c...

Embodiment 3

[0053] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0054] Waste water was treated according to the method of Example 1, the difference was that the magnetic field strength of the applied electromagnetic field was 800 Oersted; the COD value of the waste water after treatment was 98 mg / L, the BOD value was 33 mg / L, and the B / C was 0.34.

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Abstract

The invention provides a wastewater treatment method. Specifically, the method includes: under the effect of a magnetic field, suspending magnetic catalyst particles in wastewater, and conducting a mixing treatment on the wastewater, the magnetic catalyst and an oxidant so as to make the B / C of the treated wastewater larger than equal to 0.3. The wastewater treatment method provided by the invention make the magnetic catalyst particles suspended in the wastewater in the presence of an external magnetic field, and performs catalytic oxidation treatment on the wastewater. With the method, the wastewater treatment effect can be improved significantly, the wastewater treatment effect is stable, and the biodegradability of wastewater can be effectively enhanced.

Description

technical field [0001] The invention relates to a method for treating waste water. Background technique [0002] For a long time, the treatment of refractory organic wastewater in the environment has always been a difficult point in water treatment technology, and it is also an important problem that plagues the environmental circles all over the world. [0003] In recent years, significant progress has been made in the research of catalytic oxidation technology to treat refractory organic wastewater. The mechanism of catalytic oxidation technology is to use a catalyst to combine with an oxidant to generate highly active free radicals (such as hydroxyl radicals) in the reaction; and then through addition, substitution, electron transfer, bond breaking, etc. , so that the macromolecular refractory organic matter in the water body is oxidatively degraded into small molecular substances that are easily biodegradable, and even directly degraded into CO 2 and H 2 O, near compl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/48
Inventor 高峰张超崔龙鹏
Owner CHINA PETROLEUM & CHEM CORP
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