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Method and equipment for inactivating cryptosporidium and giardia cysts inside water

A technology for cryptosporidium and giardia, which is applied to the field of inactivating cryptosporidium oocysts and giardia cysts in water bodies, can solve the problems of low inactivation rate, secondary pollution, complicated equipment, etc., and achieves easy popularization and application. , Easy to operate control, easy to operate effect

Active Publication Date: 2010-01-27
SHENZHEN POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for inactivating Cryptosporidium oocysts and Giardia cysts in water. Secondary pollution and other issues
[0006] The further technical problem to be solved by the present invention is to provide a device for inactivating Cryptosporidium oocysts and Giardia cysts in water, which is simple and easy to operate, and solves the problems of complex existing devices, high cost and low efficiency

Method used

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  • Method and equipment for inactivating cryptosporidium and giardia cysts inside water
  • Method and equipment for inactivating cryptosporidium and giardia cysts inside water
  • Method and equipment for inactivating cryptosporidium and giardia cysts inside water

Examples

Experimental program
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Effect test

example 1

[0037] In this embodiment, the above-mentioned method and equipment are used to carry out photocatalytic deactivation of Cryptosporidium oocysts and Giardia cysts in water, and the specific steps are as follows:

[0038] (1) Provide the water to be treated, and carry out the purification and collection of the two worms: after the samples of the water body to be treated are collected, they are respectively filtered using a 60-150 mesh screen, floated with saturated zinc sulfate, and centrifuged with 1:1 and 1:2 sucrose gradients (rotating speed) 12000r / min), rinsed three times with phosphate buffer solution to obtain a concentration of 1.5×10 6 samples / mL of two worms, suspended in 2.5% potassium dichromate, and finally stored in a refrigerator at 4°C;

[0039] (2) Preparation of photocatalytic reagent: the rutile TiO 2 and FeC 2 o 4 The solution was mixed and stirred according to the aforementioned 10:1 ratio and adsorbed for 48 hours, then the water was evaporated to dryne...

example 2

[0047] According to the method described in Example 1, pure water was used as a water sample for a comparative test. Under the same irradiation time, take 10 minutes and set different light intensities Lightoutput (mw / cm 2 ), irradiate the experimental sample, and identify the inactivation rate of Giardia by the method of example one. The capacity of each reaction treatment solution was 50mL, and the reaction solution was stirred during the experiment to prevent the catalyst from settling. Other steps and parameters are the same as Example 1. Irradiation intensity: 2, 3.5, 4.5, 8, 10, 13, 25mw / cm 2 . Experimental results refer to figure 2 Marked as UV / TiO 2 The curve shows that under the same irradiation time, the water body is irradiated with ultraviolet light for inactivation treatment with photocatalytic reagents added, and the irradiation light intensity Lightoutput (mw / cm 2 ) on the inactivation race (%) of Giardia inactivation rate.

example 3

[0049] According to the method of Example 1, pure water was used as a water sample for a comparative test. Under the same light intensity, the irradiation intensity was 5mw / cm 2 , respectively set different irradiation time lengths, irradiate water samples, and identify the inactivation rate of Cryptosporidium according to the method of Example 1. The capacity of each reaction treatment solution was 50mL, and the reaction solution was stirred during the experiment to prevent the catalyst from settling. Other steps and parameters are the same as Example 1. The irradiation time is: 0, 5, 10, 15, 20, 25, 30, 60 minutes, the experimental results refer to image 3 Marked as UV / TiO 2 The curve shows that under the same irradiation light intensity, the water sample is irradiated with photocatalytic reagents for inactivation treatment, and the irradiation time t (min) affects the inactivation race (%) of Cryptosporidium inactivation rate influences.

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Abstract

The invention relates to a method and equipment for inactivating cryptosporidium and giardia cysts inside water. The method for inactivating the cryptosporidium and giardia cysts inside the water comprises the following steps: a first step: providing a water body to be processed; a second step: preparing a photocatalyst; and a third step: further adding the photocatalyst prepared from the second step into the water body obtained from the first step, and disinfecting the water body in a photocatalysis way under a lighting condition, wherein the amount of the photocatalyst is the same with the catalyst. The equipment comprises an ultraviolet light source irradiation device, a reactor used for accommodating the photocatalyst and the water body to be processed and a stirrer, wherein the stirrer is arranged in the reactor; and the ultraviolet light source irradiation device is arranged on the reactor. The method and the equipment have the advantages of high inactivating efficiency, low cost, easy operation, popularization and application, innocuity and no side product and can not cause secondary pollution.

Description

technical field [0001] The invention relates to water body sterilization and disinfection, in particular to a method and equipment for inactivating Cryptosporidium oocysts and Giardia cysts in water bodies. Background technique [0002] In recent years, the contamination of domestic water and drinking water by Cryptosporidium parvum and Giardia has led to the outbreak of related diseases in developed countries such as the United Kingdom and the United States, and has posed a serious threat to the health of citizens. Cryptosporidium oocysts and Giardia cysts (hereinafter referred to as "two insects") have become one of the water-borne biological risk factors that have attracted much attention. In the newly promulgated "Drinking Water Hygienic Standards" in China, Cryptosporidium and Giardia have been used as unconventional indicators of water quality and their restrictions have been stipulated. Therefore, from the perspective of ensuring the safety of drinking water, it is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/32B01J23/745B01J21/06B01J37/08
Inventor 李绍峰冉治霖崔崇威黄君礼
Owner SHENZHEN POLYTECHNIC
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