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Method for treating drinking water of replacing disinfecting action of medicament

A technology for drinking water treatment and chemical disinfection, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, etc. Oxygen bacteria re-growth, costing money and other problems, to achieve the effect of eliminating the disinfection link, reducing the amount of production, and saving costs

Inactive Publication Date: 2008-07-23
北京精密单因子水工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the increasing pollution of water sources, the types and quantities of organic and inorganic pollutants and pathogenic microorganisms in water are increasing. In order to ensure the disinfection effect, the amount of disinfectants is also increasing year by year. For this reason, the world A large amount of disinfectants will be produced every year and cost a lot of money; secondly, many disinfectants such as chlorine and ozone are very active oxides, which chemically react with many organic substances in water to produce a large amount of teratogenic, Carcinogenic and mutagenic by-products of oxidation and disinfection; in addition, various disinfectants such as chlorine and chlorine dioxide themselves in the water also have a great impact on human health; in addition, due to organic pollutants, nitrogen, phosphorus, etc. The nutrients used by bacteria provide conditions for the reproduction and growth of microorganisms in the pipe network. The drinking water that has been sterilized and qualified in the urban water plant is transported to the urban area. Even if a certain amount of residual chlorine is guaranteed, the abnormality in the water Oxygen bacteria still grow again
Therefore, traditional medicament disinfection can no longer provide safe and qualified drinking water, and the water quality problems caused by disinfection are becoming one of the most concerned issues at present.

Method used

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  • Method for treating drinking water of replacing disinfecting action of medicament
  • Method for treating drinking water of replacing disinfecting action of medicament
  • Method for treating drinking water of replacing disinfecting action of medicament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, the total phosphorus in the raw water is 64ug / L, the bioavailable phosphorus (MAP) is 3.8ug / L, and the total number of bacteria is 2.3×10 5 individual / mL, total coliform bacteria 1.8×10 7 A / L, turbidity 12.5NTU. Under the condition of sufficient stirring, pump 7 mg / L of composite high-efficiency flocculant (see attached table 1) to fully mix with the raw water, and the residence time is 30 seconds; complete the physical and chemical processes such as flocculation, adsorption, and co-sedimentation in the flocculation reactor 2, The stay time is 20 minutes. Afterwards, the upper layer is activated alumina filter layer 6 with a thickness of 500mm, the middle layer is a quartz sand filter layer 7 with a thickness of 1000mm, and the lower layer is a composite filter column 3 with a support layer 8 with a thickness of 400mm for filtration. The filtration speed is 6m / h. The filtered water is filtered by the ultrafiltration membrane filter 5, and the membra...

Embodiment 2

[0030] In this example, the total phosphorus in the raw water is 96ug / L, the bioavailable phosphorus (MAP) is 5.3ug / L, and the total number of bacteria is 7.8×10 4 individual / mL, total coliform bacteria 2.6×10 6 A / L, turbidity 10NTU. Under full stirring, pump 8 mg / L of composite high-efficiency flocculant (see attached table 1) to fully mix with raw water, and the residence time is 40 seconds; the physical and chemical processes such as flocculation, adsorption, co-sedimentation, etc. 15 marks. Afterwards, the upper layer is activated alumina filter layer 6 with a thickness of 800mm, the middle layer is a quartz sand filter layer 7 with a thickness of 1000mm, and the lower layer is a composite filter column 3 with a supporting layer 8 with a thickness of 400mm for filtration, and the filtration speed is 6m / h. The filtered water is filtered by the ultrafiltration membrane filter 5, and the membrane filtered water is tested, the total phosphorus is 0.8ug / L, the bioavailable ...

Embodiment 3

[0032] In this example, the total phosphorus in the raw water is 112ug / L, the bioavailable phosphorus (MAP) is 4.3ug / L, and the total number of bacteria is 4.5×10 5 individual / mL, total coliform bacteria 6.8×10 6 A / L, turbidity 12NTU. Under full stirring, pump 10 mg / L of composite high-efficiency flocculant (see attached table 1 for composition) and fully mix with raw water, and the residence time is 35 seconds; the physical and chemical processes such as flocculation, adsorption, and co-sedimentation are completed in the flocculation reactor 2, and the residence time 25 points. Afterwards, the upper layer is an activated alumina filter layer 6 with a thickness of 1000mm, the middle layer is a quartz sand filter layer 7 with a thickness of 800mm, and the lower layer is a composite filter column 3 with a support layer 8 with a thickness of 100mm for filtration. The filtration speed is 8m / h. The filtered water is filtered by the ultrafiltration membrane filter 5, and the mem...

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Abstract

This invention provides a method for treating drinking water capable of replacing antiseptic agent. The equipment comprises a mixing reactor, a flocculating reactor, a complex double-layer filter column, a hyperfiltration membrane filter, and a clean water container. The high-performance composite flocculants comprise: potassium permanganate 20-30 wt.%, ferrous sulfate 5-10 wt.%, ferric sulfate 30-40 wt.%, sodium sulfite 5-10 wt.%, polyacrylamide 1-3 wt.%, calcium hydroxide 0-3 wt.%, calcium chloride 1-4 wt.%, magnesium sulfate 0-3 wt.%, and sodium silicate 5-10 wt.%. The complex filtering column comprises an upper active alumina layer, a middle quartz sand layer, and a lower supporting layer. The hyperfiltration membrane is a hollow fiber membrane. This invention does not need any sterilizing unit, and can keep the biostability of the effluent water.

Description

technical field [0001] The invention belongs to the field of drinking water treatment, in particular to a drinking water treatment method which can replace the disinfection effect of medicaments. Background technique [0002] The conventional surface water treatment process is mainly designed to remove suspended solids in water and inactivate pathogenic microorganisms. Suspended solids are mainly removed by three units of coagulation, sedimentation and filtration; pathogenic microorganisms, as a kind of suspended solids in water, can be mostly removed by conventional processes of coagulation, sedimentation and filtration, and the remaining pathogenic microorganisms can be removed again. Inactivated by chemicals, so as to meet the requirements of drinking water hygiene standards. Due to the excellent effectiveness of disinfection in controlling the prevalence of infectious diseases, most water plants in the world currently have disinfection units in the water treatment proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/52C02F1/44B01D61/14
Inventor 杨艳玲张杰李星白玉华李圭白
Owner 北京精密单因子水工程技术有限公司
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