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Process of treating fluoride and organic matter in drinking water and its electrical flocculator

A treatment method and technology of organic matter, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the complex operation and management, low removal efficiency, large dosage of fluorine removal, etc. problems, to achieve the effect of reducing costs, simplifying operation and operation and maintenance work, and stabilizing and reliable water quality

Inactive Publication Date: 2007-06-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problems of large dosage, complex operation and management, and high operating costs of chemical methods for defluoridation, and the low efficiency of existing water purifiers for removing organic matter in drinking water, the purpose of the present invention is to provide a method that can simultaneously The new process and device for removing fluorine and organic matter in drinking water make it not only simple in structure, without adding any chemical agents, but also convenient in operation and management, and easy to realize automatic control.

Method used

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  • Process of treating fluoride and organic matter in drinking water and its electrical flocculator

Examples

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Embodiment 1

[0030] Example 1: 16 electrode plates are arranged in parallel in the electrolytic cell, the distance between the plates is 1.0 cm, and the current density is 15.7 A / m 2 , the residence time is 20 minutes, under the condition that the influent pH value is 7.2, the fluoride ion concentration is 5.0mg / L, and the organic matter concentration is 8.0mg / L, the effluent water in the electrolytic cell is filtered by the microfiltration membrane module, and the effluent water The fluoride ion concentration of the water is less than 0.8mg / L, which meets the standard of the fluoride ion concentration of less than 1.0mg / L stipulated in the national drinking water hygiene standard GB5749-85. The concentration of organic matter in the effluent is lower than 3.0mg / L.

Embodiment 2

[0031] Example 2: 16 electrode plates are arranged in parallel in the electrolytic cell, the distance between the plates is 0.5cm, and the current density is 5A / m 2 , the residence time is 5 minutes, under the condition that the influent pH value is 7.5 and the fluoride ion concentration is 3mg / L, after the effluent water in the electrolytic cell is filtered by the microfiltration membrane module, the fluoride ion concentration in the effluent water is lower than 0.9mg / L L.

Embodiment 3

[0032] Embodiment 3: 8 electrode plates are arranged in parallel in the electrolytic cell, the distance between the plates is 2.0cm, and the current density is 30A / m 2 , the residence time is 30 minutes, under the conditions of influent pH value of 7.0 and organic matter concentration of 10mg / L, the concentration of organic matter in the effluent water is lower than 5.0mg / L after the effluent water in the electrolytic cell is filtered by the microfiltration membrane module.

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Abstract

The present invention relates to drinking water treatment, and is especially process and electrical flocculator for treating fluoride and organic matter in drinking water. In the combined electric flocculating and microfiltering process, the electrolysis with aluminum or iron plate as electrode produces aluminum salt or iron salt capable of combining with fluorine ion and organic matter in water to form relatively large flocculate, and the subsequent filtering with microfiltering membrane eliminates the flocculate effectively to reach the aim of eliminate fluoride and organic matter from drinking water. The present invention is simple, easy to automatize and suitable for wide use in different places.

Description

technical field [0001] The invention relates to a process and a device for drinking water treatment, in particular to a process and a device for removing fluoride and organic matter in drinking water. Background technique [0002] Fluoride exists widely in nature, and the content of fluoride in natural water is generally 0.2-0.5mg / L. Some groundwater flowing through fluorine-containing ore layers can reach 2-5mg / L or higher. Long-term drinking of water with high fluoride content will cause chronic fluorosis, especially serious damage to teeth and bones, resulting in dental fluorosis, skeletal fluorosis and other diseases. Symptoms of dental fluorosis are mainly manifested as enamel damage and premature tooth loss. Domestic survey data show that, in general, drinking water with a fluoride content of 0.5-1.0 mg / L has a prevalence rate of 10%-30% of dental fluorosis, most of which are mild stains, and drinking water with a fluoride content of 1.0-1. 1.5mg / L of water, the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/58C02F1/463
Inventor 赵璇李福志
Owner TSINGHUA UNIV
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