A benthonic animal-algae-aquatic plant-fish based river water ecological environment self-remediation method

Abstract

The invention relates to a benthonic animal-algae-aquatic plant-fish based river water ecological environment self-remediation method. The method is to overcome problems of river water ecological environment remediation methods at present, namely short effect duration, high costs and easy generation of secondary pollution. The method includes 1) evaluating the degree of pollution of a river, 2) planting reed and seeding algae, 3) throwing in plankton and benthic mollusks, 4) planting submerged plants, 5) throwing in shrimps, herbivorous fishes, omnivore fishes and filter-feeding fishes, 6) throwing in carnivorous fishes, and 7) harvesting the reed and the submerged plants before the reed and the submerged plants die, catching the benthic mollusks and the shrimps, and catching the fishes after two years. The method is long in effect duration, low in cost and free of secondary pollution and is applied for the field of river water pollution remediation.

Description

technical field

[0001] The invention relates to a method for self-restoration of river water ecological environment based on benthic animals-algae-aquatic plants-fish. Background technique

[0002] With the development of industry in recent years, heavy metal pollution and eutrophication of rivers have become very serious. Relevant departments in my country have conducted comprehensive evaluations of 878 rivers in the country with a total length of 87,100 km. The evaluation results show that my country's surface water can be divided into five grades, and its pollution degree and availability are as follows: Grade 1 water—good water quality, meeting drinking water and fishery water standards, accounting for 28.1% of the total length of rivers evaluated; Grade 2 water—— Slightly polluted, in line with the hygienic standards of surface water quality, can be used as water for fishery, and can be used as drinking water after treatment, accounting for 39.5% of the total length; thi...

Examples

specific Embodiment approach 1

[0014] Specific embodiment one: this embodiment is based on the river water ecological environment self-repair method of benthic animals-algae-aquatic plants-fish, and is carried out according to the following steps:

[0015] 1. Evaluate the degree of pollution of the river to be restored according to the surface water environmental quality standards;

[0016] 2. In spring, reeds are planted in areas where the depth of the river to be repaired is less than 1.5 meters, and the planting density is 20-30 plants / m 2 , 20-30 days after planting, sow algae into the river to be repaired; for rivers that meet the standard of surface water environmental quality standard IV, the sowing amount of algae is 200-500g / m 2 ; The amount of algae sowing is 500-800g / m for rivers that meet the Class V standard of the surface water environmental quality standard 2 ;

[0017] 3. Put zooplankton evenly on the water surface of the river to be repaired, and put benthic molluscs into the river to be ...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the algae described in step 2 is Chlorella. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the zooplankton described in step 3 is a rotifer or a cladocera. Others are the same as in the first or second embodiment.

[0026] The cladocera described in the present embodiment are flea-shaped pan, large-scale pan, longline pan, zheshui pan, square reticulated pan, transparent pan and helmet-shaped pan; Brachion rotifers.

technical field

[0001] The invention relates to a method for self-restoration of river water ecological environment based on benthic animals-algae-aquatic plants-fish. Background technique

[0002] With the development of industry in recent years, heavy metal pollution and eutrophication of rivers have become very serious. Relevant departments in my country have conducted comprehensive evaluations of 878 rivers in the country with a total length of 87,100 km. The evaluation results show that my country's surface water can be divided into five grades, and its pollution degree and availability are as follows: Grade 1 water—good water quality, meeting drinking water and fishery water standards, accounting for 28.1% of the total length of rivers evaluated; Grade 2 water—— Slightly polluted, in line with the hygienic standards of surface water quality, can be used as water for fishery, and can be used as drinking water after treatment, accounting for 39.5% of the total length; thi...

Examples

specific Embodiment approach 1

[0014] Specific embodiment one: this embodiment is based on the river water ecological environment self-repair method of benthic animals-algae-aquatic plants-fish, and is carried out according to the following steps:

[0015] 1. Evaluate the degree of pollution of the river to be restored according to the surface water environmental quality standards;

[0016] 2. In spring, reeds are planted in areas where the depth of the river to be repaired is less than 1.5 meters, and the planting density is 20-30 plants / m 2 , 20-30 days after planting, sow algae into the river to be repaired; for rivers that meet the standard of surface water environmental quality standard IV, the sowing amount of algae is 200-500g / m 2 ; The amount of algae sowing is 500-800g / m for rivers that meet the Class V standard of the surface water environmental quality standard 2 ;

[0017] 3. Put zooplankton evenly on the water surface of the river to be repaired, and put benthic molluscs into the river to be ...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the algae described in step 2 is Chlorella. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the zooplankton described in step 3 is a rotifer or a cladocera. Others are the same as in the first or second embodiment.

[0026] The cladocera described in the present embodiment are flea-shaped pan, large-scale pan, longline pan, zheshui pan, square reticulated pan, transparent pan and helmet-shaped pan; Brachion rotifers.

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