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Method for efficient inhibition of sewage plant effluent microalgae with submerged plants

A technology for submerged plants and sewage plants, applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as low concentration of algae, expensive treatment costs, secondary pollution, etc. , to achieve good ecological and aesthetic benefits, significant effects, and strong nitrogen and phosphorus removal effects

Active Publication Date: 2019-12-31
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fatal disadvantage of the physical method is its expensive treatment costs, so the scope of application of this method can only be limited to small water bodies or local waters of large water bodies
(2) The chemical method is to add chemical reagents to the water body where microalgae blooms have occurred, and use oxidation or other effects to kill algal cells, thereby inhibiting the growth of algae. The concentration is not high, with the risk of secondary pollution
However, there is still no good solution to efficiently suppress algal blooms by using submerged plant combinations.

Method used

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  • Method for efficient inhibition of sewage plant effluent microalgae with submerged plants
  • Method for efficient inhibition of sewage plant effluent microalgae with submerged plants
  • Method for efficient inhibition of sewage plant effluent microalgae with submerged plants

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment is used to investigate the inhibitory effect of the present invention on the effluent microalgae of a certain water purification plant in Beijing, specifically comprising the following steps:

[0035] (1) Select the first-class A-marked water of a certain sewage plant, and measure its related indicators: the total nitrogen content TN is 15mg / L, the total phosphorus content TP is 0.5mg / L, and the chlorophyll concentration is 5.86μg / L;

[0036] (2) Select the submerged plants that control algae, such as black algae and P. spicanus, first rinse with tap water to remove the attached phytoplankton, and then plant them in a 20L glass tank with test water samples. Cultivate the bottom of the cup and pebbles to fix the submerged plants, and place them in the greenhouse for at least 2 weeks to adapt to the experimental conditions. Before the experiment, select plants that grow robustly and have the same size and condition, wash them with tap water to fully remove ...

Embodiment 2

[0043] This embodiment is used to investigate the inhibitory effect of the present invention on the effluent microalgae of a certain water purification plant in Kunming City, specifically comprising the following steps:

[0044] (1) Select the first-class A-labeled water of a water purification plant in Kunming City, and measure its related indicators: the total nitrogen content TN is 14.3mg / L, the total phosphorus content TP is 0.42mg / L, and the chlorophyll concentration is 5.79μg / L ;

[0045] (2) Select the submerged plants that control algae, such as black algae and P. spicanus, first rinse with tap water to remove the attached phytoplankton, and then plant them in a 20L glass tank with test water samples. Cultivate the bottom of the cup and pebbles to fix the submerged plants, and place them in the greenhouse for at least 2 weeks to adapt to the experimental conditions. Before the experiment, select plants that grow robustly and have the same size and condition, wash them ...

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Abstract

The invention discloses a method for efficient inhibition of sewage plant effluent microalgae with submerged plants. The method includes the steps of: (1) selecting a sewage plant effluent test watersample and putting the test water sample into a container; (2) selecting hydrilla and myriophyllum spicatum as the submerged plants for algae control, removing attached zooplankton and phytoplankton,then planting the submerged plants in a container filled with the test water sample, placing the container in a greenhouse to grow for at least two weeks, selecting plants which grow healthily and areconsistent in size, then removing the attached zooplankton and phytoplankton again, and carrying out aeration culture for planting; and (3) jointly cultivating the submerged plant combination according to a mixed planting total density of 13+ / -0.5kg (wet weight) / m<3> in a sewage plant effluent riverway, and controlling the planting ratio of the hydrilla to myriophyllum spicatum at (1-1.1):1. Themethod provided by the invention can achieve an inhibition rate up to 90% or above on the maximum biomass of microalgae, a TN removal rate up tp 60% or above, and a TP removal rate up to 95% or above.

Description

technical field [0001] The invention relates to the technical field of water body restoration, in particular to a method for efficiently suppressing microalgae effluent from a sewage plant by using submerged plants, and in particular to a treatment method for repairing water bodies by using a combined submerged plant of black algae and P. spicanus. Background technique [0002] Since the 1930s, the increasingly prominent global eutrophication and algal blooms have exacerbated the water resource crisis. The recycling of sewage is the best way to solve the shortage of water resources and complete the natural restoration of the water ecological cycle. Due to the high background value of pollutants in the effluent of sewage plants, eutrophication is more likely to occur after reuse in landscape water bodies than in natural rivers and lakes, and urban landscape water bodies are mostly still water landscapes or in conditions with very weak self-purification capabilities. These unf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F101/10C02F101/16
CPCC02F3/322C02F2101/105C02F2101/16C02F2303/20
Inventor 胡洪营陆轶峰郭昉王胜楠刀国华张琳潘国强
Owner TSINGHUA UNIV
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