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A method of using high-quality light source to promote duckweed to quickly purify micro-polluted surface water

A technology of micro-polluted water and duckweed, which is applied in the field of aquatic energy plant environmental restoration, can solve the problems of inability to meet the purification needs of micro-polluted water bodies, slow down the reproduction speed, etc., achieve reduced light energy consumption, high comprehensive utilization rate, and reduced electric energy The effect of consumption

Active Publication Date: 2020-09-01
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has its own limitations: Generally speaking, duckweed can only reproduce in large areas of shallow water. In mountainous areas and cities where the light is not suitable and there are few open areas, the reproduction speed is obviously slowed down, which cannot meet the purification requirements of micro-polluted water bodies. need
[0007] However, there are no reports on the effects of different light quality or spectral energy distribution on the growth of duckweed. To explore the effect of single light or mixed light mixed in an appropriate proportion on the growth of duckweed is important for improving the viability of duckweed and effectively promoting the growth of duckweed. Micro-polluted water treatment has important practical significance

Method used

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  • A method of using high-quality light source to promote duckweed to quickly purify micro-polluted surface water
  • A method of using high-quality light source to promote duckweed to quickly purify micro-polluted surface water
  • A method of using high-quality light source to promote duckweed to quickly purify micro-polluted surface water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: Cultivating duckweed under a single red light to purify Class IV water

[0079] (1) According to the operation steps of Comparative Example 1, the light source was changed from ordinary white LED light to red light LED light, and the rest of the conditions were completely the same, and cultured under full light for 7 days. Samples were taken on days 1, 2, 3, 5, and 7.

[0080] (2) measure dry weight, starch content of each sampling duckweed by the method for comparative example 1, calculate the biomass of duckweed, dry matter accumulation rate, starch content, starch output and starch accumulation rate, the result is as follows Figure 5 , 7 , 9, 11, and 13.

[0081] Depend on Figure 5 , Figure 7 According to the biomass and dry matter accumulation rate data, the biomass of duckweed is respectively: 25.63g / m 2 (1d), 34.59g / m 2 (2d), 52.66g / m 2 (3d), 67.25g / m 2 (5d) and 72.30g / m 2 (7d). The average dry matter accumulation rate of duckweed was 11.56...

Embodiment 2

[0087] Example 2: Cultivating duckweed under a single blue light to purify Class IV water

[0088] (1) According to the operation steps of Comparative Example 1, the light source was changed from ordinary white LED light to blue light LED light, and the rest conditions were exactly the same, and cultured in full light for 7 days. Samples were taken on days 1, 2, 3, 5, and 7.

[0089] (2) by the method for comparative example 1, measure the dry weight, starch content of each sampling duckweed, calculate the biomass of duckweed, dry matter accumulation rate, starch content, starch output and starch accumulation rate, the result is as follows Figure 5 , 7 , 9, 11, and 13.

[0090] Depend on Figure 5 , 7 According to the biomass and dry matter accumulation rate data, the biomass of duckweed is 26.72g / m 2 (1d), 35.69g / m 2 (2d), 52.98g / m 2 (3d), 67.53g / m 2 (5d) and 70.62g / m 2 (7d). The average dry matter accumulation rate of duckweed was 12.65g / m 2 d(1d), 10.81g / m 2 d(...

Embodiment 3

[0096] Example 3: Cultivating duckweed under different proportions of red-blue mixed light to purify class Ⅳ water

[0097] (1) According to the operation steps of Comparative Example 1, the light source was changed from a normal white LED lamp to a red-blue mixed LED lamp. The ratio of red and blue light is shown in Table 5. The rest of the conditions were exactly the same, and they were cultivated in full light for 7 days. Samples were collected on days 1, 2, 3, 5, and 7.

[0098] Table 5 Red-blue mixed light ratios

[0099]

[0100]

[0101] (2) By the method of Comparative Example 1, measure the dry weight and starch content of each sampling duckweed, and calculate the biomass, dry matter accumulation rate, starch content, starch yield and starch accumulation rate of duckweed. The results are shown in Table 6.

[0102] Table 6 The growth of duckweed under the action of different proportions of red-blue mixed light

[0103]

[0104] (3) By the method of compara...

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Abstract

The invention belongs to the field of aquatic energy plant environment restoration, and particularly relates to a method for promoting lesser duckweed to rapidly purify slightly-polluted surface waterby utilizing a high-quality light source. On the basis of white light, an unnecessary spectrum is eliminated, only red-blue mixed light of a given wavelength and photon flux density with a ratio of red light to blue light of 4:1 is used for culturing the lesser duckweed, so that the consumption of the light energy is effectively reduced, the power resource is saved, and the effect is apparently better than the white light, single light and other combined red-blue mixed light. The water purifying method is nontoxic, harmless, environment-friendly, and capable of rapidly purifying pollutants such as nitrogen and phosphorus in the water. When the water is purified, the cultured lesser duckweed can grow rapidly and accumulate starch, and after the slightly-polluted water is processed, the lesser duckweed can be further processed into a medicinal material, food, feed and the like, so that the comprehensive utilization rate is high.

Description

technical field [0001] The invention belongs to the field of aquatic energy plant environment restoration, and in particular relates to a method for promoting duckweed to rapidly purify slightly polluted surface water by using a high-quality light source. Background technique [0002] Surface water is one of the important sources of water for human life, but the current pollution situation is severe. "Surface Water Environmental Quality Standards" (GB3838-2002) stipulates that Ⅰ-Ⅲ water can be used as drinking water for human beings, while Ⅳ-Ⅴ water belongs to slightly polluted water bodies and can only be used as industrial or agricultural water. As the population continues to grow and the relationship between humans and water becomes increasingly tense, the treatment of slightly polluted surface water bodies is imminent. [0003] At present, the main methods of purifying slightly polluted surface water include: biological activated carbon adsorption, ion exchange, membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F101/16C02F101/10
CPCC02F3/32C02F2101/105C02F2101/16
Inventor 赵海方扬靳艳玲李琪许亚良杨贵利赖烦
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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