Method for cooperatively processing micro pollution drinking water source by ozone-bentonite-Fe

A technology of synergistic treatment and bentonite, applied in the field of water treatment, can solve the problems of weakening the oxidation of organic matter in water by advanced oxidation technology, large dosage of ozone, and low treatment efficiency, and achieves the effect of simple method, easy operation and accelerated removal

Inactive Publication Date: 2009-11-18
ZHEJIANG UNIV
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Problems solved by technology

However, in the slightly polluted drinking water source water, it not only contains more complex aromatic compounds, but also contains a large amount of natural organic matter
A large amount of natural organic matter in the source water will compete with aromatic compounds during the treatment process, affecting the treatment efficiency
What is more noteworthy is that natural organic matter is also a HO free

Method used

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  • Method for cooperatively processing micro pollution drinking water source by ozone-bentonite-Fe
  • Method for cooperatively processing micro pollution drinking water source by ozone-bentonite-Fe

Examples

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example 1

[0018] The method of the invention is used to treat slightly polluted drinking water source water containing natural organic humic acid and aromatic compound o-dichlorobenzene, the concentration of humic acid in the source water is 5 mg / l, and the concentration of o-dichlorobenzene is 7.5 mg / l. The dosage of ozone is 0.96mg / l, the dosage of bentonite is 100mg / l, Fe 3+ (FeCl 3 ) dosage is 5mg / l. The concentration of o-dichlorobenzene can be obtained by testing, while the concentration of humic acid is measured by UV 254 obtained indirectly.

[0019] figure 1 Example 1 Ozonation and Ozone-Bentonite-Fe 3+ Comparison of treatment effects on simulated slightly polluted drinking water source water.

[0020] Depend on figure 1 Visible, using ozone-bentonite-Fe 3+ When treating the simulated micro-polluted drinking water source water, the treatment efficiency of o-dichlorobenzene has been greatly improved compared with the ozone oxidation treatment. At the same time, the UV of ...

example 2

[0022] Process real micro-polluted drinking water source water (source water comes from the Posting Sand River in Hangzhou City with the inventive method. The Posting Sand River is as the back-up water source ground in Hangzhou City, and the water body is clearer, with trace light green algae, its permanganate Index between 5.0 and 7.0, pH between 6.9 and 7.1, UV 254 The value is 0.825~0.919cm -1 ). The dosage of ozone is 0.96mg / l, Fe 3+ The concentration is 5mg / l, react for 40min, gradually increase the dosage of bentonite, obtain the treatment effect under different dosage of bentonite (0-500mg / l), and compare the chloroform after the source water is treated by different systems Changes in generating potential.

[0023] figure 2 A has provided ozone-bentonite-Fe under the different bentonite dosages of example 2 3+ The treatment effect on the actual slightly polluted drinking water source water.

[0024] figure 2 B has provided the variation comparison of source wat...

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Abstract

The invention discloses a method for cooperatively processing micro pollution drinking water source by ozone-bentonite-Fe, which comprises the following steps of: ozone, bentonite original soil and Fe are added simultaneously into water source to be processed; the additive amout of the ozone is 0.5mg/1-10mg/1; the additive amount of the bentonite original soil is 50-500mg/1; and the additive amount of the Fe is 0.5-20mg/l. The method is simple and has convenient operation. The adsorption effect of the bentonite is utilized for adsorbing the aromatic compounds and natural organic matter in water; the Fe can cause the bentonite particles to be destabilized and form large floccules, thus realizing the adsorption and removing of the organic matter in water; the Fe also can catalyze the conversion of the ozone to the HO., thus realizing the high efficient oxidizing removing of the organic pollutant. The method has the low operation cost and the high processing efficiency, can simultaneously remove the aromatic compounds and the natural organic matter, and can be applied in the processing of a micro pollution drinking water source in large scale.

Description

technical field [0001] The invention relates to a method for treating slightly polluted drinking water source water, belonging to the technical field of water treatment. Background technique [0002] With the aggravation of water pollution and the increasingly stringent drinking water quality indicators, the development of advanced treatment technology for slightly polluted drinking water source water has received more and more attention. There are many types of organic matter in micro-polluted source water with complex components, especially the existence of some persistent organic pollutants in water bodies, which endangers people's water safety. Conventional coagulation-sedimentation technology has been difficult to effectively control organic matter in slightly polluted drinking water source water. Therefore, advanced oxidation technology has become a new technology and method for treating complex organic matter in water treatment today. [0003] Ozone oxidation techno...

Claims

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Application Information

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IPC IPC(8): C02F1/78C02F1/28
Inventor 雷乐成古励刘贤君张兴旺
Owner ZHEJIANG UNIV
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