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Photodynamic-based drinking water disinfection method

A disinfection method and drinking water technology, applied in the direction of sterilization/microdynamic water/sewage treatment, light water/sewage treatment, etc., can solve the problems of no continuous sterilization ability, large investment in equipment, carcinogenicity, etc., and achieve good disinfection effect, The effect of high safety and simple process

Inactive Publication Date: 2014-08-20
刘一鸣 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main problems of traditional disinfection technology are: ultraviolet disinfection, scaling on the surface of the ultraviolet light source lamp affects the disinfection effect, has no continuous sterilization ability, will cause the reproduction of microorganisms, and requires a large investment in equipment; chlorine disinfection often interacts with organic matter in water, A series of substitution reactions occur, resulting in carcinogenic and teratogenic organochlorine derivatives, which seriously affect human health, accompanied by discomfort in taste and smell
[0005] At present, the application of photodynamic force in drinking water disinfection has not been reported at home and abroad.

Method used

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  • Photodynamic-based drinking water disinfection method

Examples

Experimental program
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Effect test

Embodiment 1

[0046]Add different concentrations (0.25uM, 0.5uM, 0.75uM, 1uM) of food-grade curcumin to tap water, and apply LED blue light source (425-480nm) to illuminate for 30s to kill the virus. 765cfu / mL decreased to 420cfu / mL, 180cfu / mL, 135cfu / mL, and 104cfu / mL, respectively, and the reduction factors were 1.8, 4.3, 5.7, and 7.4 times. According to the chromaticity requirements of drinking water hygiene standards and the disinfection effect, we selected a curcumin concentration of 0.5uM, optimized the disinfection time, and set the light for 30s, 45s, and 60s respectively. The total number of bacteria decreased from 427cfu / mL in the blank control group to 141cfu / mL, 111cfu / mL, and 23cfu / mL, respectively, and the reduction factors were 3.0, 3.8, and 18.3 times, respectively. Therefore, the drinking water disinfection method with a curcumin concentration of 0.5uM and a light time of 60s has met the sanitary standard requirements for drinking water, and the color of the water body has ...

Embodiment 2

[0048] The present invention is further applied to the disinfection of different water qualities (sea water, bottled water and mineral water). Add 0.5uM food-grade curcumin to fresh seawater, bottled water before and after opening for 3 days, and mineral water, and apply LED blue light source (425-480nm) light for 60s for disinfection. Since bottled water and mineral water are all sterilized, in order to evaluate the sterilizing effect of the present invention, the samples need to be left open for about 3 days for verification. The results showed that after 60 seconds of photodynamic irradiation mediated by 0.5uM curcumin, the total number of bacteria in seawater dropped from 895cfu / mL to 41cfu / mL, a decrease of 21.6 times, and the total number of bacteria in bottled water dropped from 413cfu / mL to 21cfu / mL , decreased by 19.4 times, and the average total number of bacteria in mineral water decreased from 96cfu / mL to 10cfu / mL, a decrease of 9.6 times, all of which achieved goo...

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Abstract

The invention provides a photodynamic-based drinking water disinfection method which comprises the following steps: 1. adding curcumin into water; and 2. disinfecting the curcumin-added water obtained in the step 1 by irradiation with a light source. The physical and chemical processes are combined by compounding the food-grade curcumin with the special-wavelength light, so that no harmful byproduct can be generated after photodynamic disinfection, and no secondary pollution can be generated on the ambient water body; and thus, the method overcomes the defects in the existing domestic water disinfection technique, so that the total bacterial count and chroma of the water body satisfy the water standard requirements. The method has the advantages of high operating safety, low cost and simple process, is easy to operate, and has favorable disinfection effects on seawater as well as mineral water and barreled water placed for some time.

Description

technical field [0001] The invention relates to the technical field of drinking water disinfection, in particular to a photodynamic-based drinking water disinfection method. Background technique [0002] The safety of drinking water has attracted worldwide attention. Disinfection technology in the process of drinking water treatment has always been an important topic discussed by water science and technology workers. [0003] The main problems of the traditional disinfection technology are: ultraviolet disinfection, scaling on the surface of the ultraviolet light source lamp affects the disinfection effect, no continuous sterilization ability, it will cause the reproduction of microorganisms, and the investment in equipment is large; chlorine disinfection often interacts with organic matter in water, A series of substitution reactions occur, resulting in carcinogenic and teratogenic organochlorine derivatives, which seriously affect human health, accompanied by discomfort i...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/50
Inventor 刘一鸣武娟许川山薛勇薛长湖
Owner 刘一鸣
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