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Ecological shelter type eutrophic water treatment method

A technology of eutrophic water and a treatment method, applied in the field of eutrophic water treatment, can solve the problems of high management cost, low efficiency and high production cost

Inactive Publication Date: 2016-09-07
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reasons are large shallow water bodies, low water environment heterogeneity, tense relationship between predators and prey, poor buffer capacity, and relatively fragile ecosystem, especially after the aquatic plants fade and the shoreline developmental index drops sharply
It is manifested that the flow of substances that can be carried out along the food chain in water is broken due to the lack of a certain trophic level, causing the substances that are the elements of organisms to become nutrients for algae or large plants, causing them to multiply in large quantities, resulting in deterioration of water quality
[0004] 2) Biological floating bed or ecological floating island, the method of planting large plants on the surface of the water body, only absorbs inorganic nutrients in the water, is highly dependent on light, has lower productivity than algae, and has high management costs, and shading and hindering the flow of water and the atmosphere Material exchange, limited range of application, low efficiency
[0005] 3) Artificial fishing reefs provide shelter for lower organisms and small fish, but because they shelter all small organisms, these organisms are in a food chain relationship, and the consumption of biological energy is relatively large, which has a large impact on the food chain of the entire water body The efficiency is low, and secondly, the production cost is high, and it cannot be maintained by symbiotic organisms, so manual maintenance is difficult, and the return effect is unstable
[0006] 2. For a long time, intensive farming has been mainly based on feeding feed and changing water in a timely manner. Ecosystems that have not established a complete food chain in aquaculture water use lower animals and plants to consume residual bait and feces and water. The absorption and purification of free sulfide, ammonia and nitrite, the natural water body that discharges a large amount of aquaculture sewage
In recent years, people have begun to pay attention to environmentally friendly farming methods, but the cost of water treatment systems used is relatively high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] In this embodiment, laboratory tests were performed, and the eutrophic water and food chain were manually set, so the water body survey steps were omitted.

[0021] Put the aquarium 1×1×0.5m 3 Use a 60-mesh silk screen to divide it into two parts of 1:3, and then add eutrophic water, the indicators are as follows: COD is 10.2mg / L, NH 3 -N is 1.2mg / L, TN is 2.8mg / L, TP is 0.125mg / L, Chl-a is 54μg / L, and the transparency is 20cm, then put a 50g tilapia into the side of the large space and the small space Put 20g of mixed zooplankton caught in the wild into one side. One side of the small space provides shelter for zooplankton, which is surrounded by 60-mesh tulle and the walls of the aquarium, so that the large population, that is, the breeding population, can be protected, and small individuals can spread into the large space to feed on them The algae in the large space grow and are eaten by the fish at the same time, and the algae in the large space also spread to the...

Embodiment 2

[0024] A lake with an area of ​​32ha, a depth of 3m, COD of 14.1mg / L, TN of 2.2mg / L, TP of 0.080mg / L, Chl-a of 28μg / L and a transparency of 50cm, showing that the content of phytoplankton and dissolved organic matter exceeded the standard . The survey shows that its main fish are omnivorous fish, and zooplankton are suppressed by omnivorous fish, making the intermediate link of phytoplankton-zooplankton-fish a bottleneck, and the zooplankton community needs to be strengthened.

[0025] Set up a shelter space in the center of the lake, surrounded by mesh and reinforced wooden piles to form a 0.2ha area, the layout is as follows figure 2 shown. First drive away the original fish in the shelter space, and then put 800 100g perchs that prey on small fish to prevent the invasion of small miscellaneous fish that eat zooplankton and protect the zooplankton in the shelter space. The water quality improved significantly in the second year: COD was 10.1mg / L, TN was 1.9mg / L, TP was 0....

Embodiment 3

[0027] A cement pool in a factory nursery workshop, 40m 2 , 1m deep, there are 2.6 million zodiac larvae of prawns, and artificial feed is fed to them every day, which makes a large amount of residual feed and feces deteriorate the water quality. 2 - -N is 0.14-0.68mg / L. Put 2 pieces of 1×1×0.5m 3 The 100-mesh net cages were put into them, and 650,000 artemia nauplii were put into them, so that they could swallow the residual feed and feces inside. As a result, the COD dropped to 8-18mg / L on the third day, and the NO 2 - -N is 0.12-0.52mg / L. This is also a process of rebuilding the food chain, that is, the larvae of Artemia swallow the residual feed and feces particles in the water to purify the water quality, and the grown Artemia larvae can become high-quality bait for prawn seedlings.

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Abstract

The invention relates to an ecological shelter type eutrophic water treatment method. The ecological shelter type eutrophic water treatment method includes the steps of (1), investigating a water body ecological system and determining disadvantageous communities; (2), establishing a sheltering space in a water body, protecting or multiplying the disadvantageous biological communities in the sheltering space, and diffusing outwards after abundance is increased, wherein organisms coexisting with the biological communities in the sheltering space can be put in the sheltering space. The ecological shelter type eutrophic water treatment method can enable the whole food chain in the water body to work stably and efficiently, and surplus products in the water body can flow and be concentrated to large animal bodies according to the food chain of phytoplanktons, zooplanktons and large animals, so that the water body can be purified.

Description

technical field [0001] The invention relates to a treatment method for eutrophic water, in particular to an ecological shelter type eutrophic water treatment method. The method is mainly aimed at the eutrophication control of lakes, reservoirs and wetlands, and the treatment of water bodies based on environmentally friendly intensive farming. Background technique [0002] 1. The deterioration of the water quality of my country's inland water resources is mainly due to eutrophication, manifested as a large number of algal blooms, especially in several large lakes, which is particularly worrying. There are currently three types of ecological governance methods: [0003] 1) Biological manipulation (biomaniputlation), including classic and non-classical methods, that is, the method of inhibiting omnivorous fish by feeding carnivorous fish to promote zooplankton to eat phytoplankton, and the method of directly feeding filter-feeding fish to filter algae. Current data show that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32C02F3/327
Inventor 王宇庭
Owner HUZHOU TEACHERS COLLEGE
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