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Method and equipment for inactivating cryptosporidium oocysts and giardia cysts in water

A technology for cryptosporidium and giardia, which is applied in the field of inactivating cryptosporidium oocysts and giardia cysts in water bodies, can solve the problems of complex equipment, low inactivation rate, secondary pollution, etc., and achieve simple operation, Effects that are easy to promote and apply, and easy to operate and control

Active Publication Date: 2012-02-22
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 oocysts and giardia cysts in water
  • Method and equipment for inactivating cryptosporidium oocysts and giardia cysts in water
  • Method and equipment for inactivating cryptosporidium oocysts and giardia cysts in water

Examples

Experimental program
Comparison scheme
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 the cryptosporidium inactivation rate influences.

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Abstract

The invention relates to a method and equipment for inactivating Cryptosporidium oocysts and Giardia cysts in water. The inactivation method comprises: the first step of providing water to be treated; the second step of preparing a photocatalyst; and the third step of providing The photocatalyst prepared in the second step is added into the water body obtained in the first step, and the photocatalytic disinfection is carried out on the water body under the condition of light. The equipment used includes: an ultraviolet light source irradiation device, a reactor for containing the photocatalyst and the water solution to be treated, and a stirrer installed in the reactor; the ultraviolet light source irradiation device is arranged on the reactor. The method and equipment have high inactivation efficiency, low cost, simple operation, easy popularization and application, and are non-toxic and by-products, and will 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 Patents(China)
IPC IPC(8): B01J23/745B01J21/06B01J37/08C02F1/30C02F1/32
Inventor 李绍峰冉治霖崔崇威黄君礼
Owner SHENZHEN POLYTECHNIC
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