Method for controlling algal blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide

A hydrogen peroxide and ultraviolet technology, applied in the field of water treatment, can solve the problems of slow effect of inactivating algal cells, affecting large-scale use, and competing free radical consumption, shortening the time required for effect, reducing the dosage of pharmaceuticals, cost reduction effect

Active Publication Date: 2022-04-19
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But simultaneous implementation of UV and H 2 o 2 The generated free radical OH is located outside the algal cells, and its rapid quenching characteristics cause it to only attack the external structure of the algal cells, and have little effect on the interior of the algal cells, and the effect of inactivating the algal cells is slow
In addition, organic matter in water will affect the penetration of ultraviolet rays and compete for the consumption of free radicals·OH, resulting in the ultraviolet rays and H required to inactivate algal cells. 2 o 2 The doses are all high, affecting its large-scale use

Method used

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  • Method for controlling algal blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide
  • Method for controlling algal blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide
  • Method for controlling algal blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide

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Embodiment 1

[0049] The present embodiment provides a method for controlling algae blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide, comprising the following steps:

[0050] Water bloom indicator: the water contains Microcystis aeruginosa and microcystin, and the algae cell density in the water is detected. Wherein, the density of algae cells is directly detected by flow cytometry, and the concentration of algal toxins is detected by LC / MS / MS.

[0051] UV and H 2 o 2 There are three modes of joint processing, as shown in Table 1.

[0052] Mode 1 is Synchronous UV / H 2 o 2 Combined use, that is, ultraviolet light and H 2 o 2 are implemented one-time. Dosing a certain amount of H at the beginning of irradiation 2 o 2 The solution makes H 2 o 2 The final concentration was 0.025mM. Turn on the ultraviolet quasi-parallel beam instrument, and irradiate the water containing algal cells and extracellular algal toxins with ultraviolet rays, and...

Embodiment 2

[0059] The present embodiment provides a method for controlling algae blooms or red tides with intermittent combined use of ultraviolet rays and hydrogen peroxide, comprising the following steps:

[0060] Water bloom indicator: the water contains Microcystis aeruginosa and microcystin, and the algae cell density in the water is detected. Wherein, the density of algae cells is directly detected by flow cytometry, and the concentration of algal toxins is detected by LC / MS / MS.

[0061] UV and H 2 o 2 The processed patterns are divided into three categories, as shown in Table 2.

[0062] The control group is the sample without any treatment.

[0063] The ultraviolet treatment group is to only irradiate the water containing algal cells and extracellular algal toxins with ultraviolet rays, and the dose of ultraviolet rays in the two groups is set to 50mJ cm -2 and 150mJ cm -2 .

[0064] In the hydrogen peroxide treatment group, only hydrogen peroxide is used to treat water con...

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Abstract

The invention provides a method for controlling algae blooms or red tides by intermittent combined use of ultraviolet rays and hydrogen peroxide. The method comprises: adding hydrogen peroxide to the water body suffering from algae bloom or red tide, and then immediately implementing the first ultraviolet source irradiation; after the first ultraviolet source irradiation, stopping the irradiation for intermittent, and then implementing the second ultraviolet source irradiation The secondary ultraviolet source is irradiated, so as to realize the control of algae bloom or red tide. The method of the invention can effectively improve the inactivation effect of algae cells, shorten the time required for effective results, reduce the dosage of medicines, and produce no harmful by-products in the treatment process, which is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for treating algae blooms or red tides by intermittent combined use of ultraviolet rays and hydrogen peroxide. The method is applicable to various eutrophic water bodies such as lakes, reservoirs, rivers, ponds, and oceans. Prevention and control of algal blooms or red tides. Background technique [0002] Algae blooms or red tides refer to the excessive reproduction of algae after the excess of nutrients such as nitrogen and phosphorus in the water body presents a state of eutrophication. Algae that have been recorded to form water blooms or red tides include cyanobacteria, green algae, diatoms, dinoflagellates, golden algae, needles, and dinoflagellates. Algae blooms or red tides consume nutrients in the water body, and the algae death process consumes dissolved oxygen in the water body, causing the death of other aquatic animals and plants. Some a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/32
CPCC02F1/722C02F1/32
Inventor 陶益郑界滕飞周婷如
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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