A simulation method for the restoration of benthic algae using filter-feeding organisms

A technology of benthic algae and simulation method, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can reduce the concentration of suspended solids in the water body, improve the turbidity of the water body and promote growth.

Active Publication Date: 2017-08-25
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Description
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  • Application Information

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Problems solved by technology

The increase in nutrient input leads to an abnormal increase in planktonic algae, a decrease in benthic algae (or submerged plants), a decrease in biodiversity, and a serious degradation of the structure and function of the ecosystem, which also greatly reduces the service value of the water ecosystem

Method used

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  • A simulation method for the restoration of benthic algae using filter-feeding organisms
  • A simulation method for the restoration of benthic algae using filter-feeding organisms
  • A simulation method for the restoration of benthic algae using filter-feeding organisms

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Embodiment 1

[0025] Embodiment 1 Utilizes the simulation method of filter-feeding biological ecology to restore benthic algae

[0026] The simulation method of the present invention includes the following processes:

[0027] (1) Sediment preparation: The sediment comes from Taihu Lake. It is used after being sieved and mixed with a 60-mesh silk screen. Before the experiment starts, it is divided into experimental barrels with a thickness of 10 cm. The container used in the experiment is a dark blue high-strength container. 16 polyethylene plastic barrels (70cm high, 48cm and 40cm diameters at the upper and lower bottoms);

[0028] (2) Lake water preparation: Inject 70 L of Taihu Lake water filtered through 500 mesh into the barrel. In order to simulate wind and wave disturbance, a small wave-making pump (power 3 W, lift 0.5 m), placed at 10 cm below the water surface; in order to control the water temperature, the experimental bucket was placed in an outdoor 15 m × 20 m cement pool with a...

Embodiment 2

[0038] Application in the Restoration of Lake Eutrophic Water Body in Example 2

[0039] The ecological restoration demonstration project of Wuli Lake in Wuxi. The demonstration project covers an area of ​​10,000 square meters. Construction began in May 2014. In July, 3,000 kilograms of river clams (300g / m 2 ), after the completion of the project in September, the transparency of the water body improved from the original 30 cm to more than 90 cm, and the biomass of benthic algae increased from the original 0.12 mg / cm 2 rise to 1.08 mg / cm 2 , the water body is clear and the water quality is good.

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Abstract

The present invention provides a simulation method for restoring benthic algae by using filter-feeding organisms. The present invention includes the following technical points: taking the density of river clams as the influencing factor of the experiment, four groups of treatments are set, namely the control group, the low-density group and the medium-density group. Density group and high-density group. The density setting refers to the natural abundance of clams in Taihu Lake. This simulation method includes sediment preparation, lake water preparation, benthic algae collection method preparation, simulation experiment and sampling and other technical designs to simulate restoration of eutrophication. Benthic algae in water bodies. The invention can promote the growth of benthic algae in the eutrophic water body, and is of great significance to the ecological restoration of the eutrophic water body. The advantages of the present invention are: the accurate simulation of the filter-feeding bioremediation of benthic algae is realized by the present invention, and a method that is reliable in technology, simple and easy to implement, low in cost and can effectively restore benthic algae in eutrophic water is provided. , for ecological restoration of eutrophic water bodies (such as lakes and ponds).

Description

technical field [0001] The invention relates to the field of new environmental protection technologies, in particular to a simulation method for filter-feeding organisms to restore benthic algae. Background technique [0002] Eutrophication caused by excessive input of nutrients (mainly nitrogen and phosphorus) is one of the most widely concerned water environmental problems in the world. Many important large lakes such as Dianchi Lake, Taihu Lake and Chaohu Lake in my country are also facing environmental problems caused by eutrophication. The increase of nutrient input leads to the abnormal increase of planktonic algae, the reduction of benthic algae (or submerged plants), the decrease of biodiversity, the serious degradation of the structure and function of the ecosystem, and the service value of the water ecosystem is also greatly reduced. Therefore, the key to eutrophic water body restoration is how to transfer nutrients from planktonic (mainly concentrated in plankton...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
Inventor 李宽意杨宏伟沈睿杰朱小龙宁晓雨靳辉
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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