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Water quality environment in situ rehabilitation method in aquatic breeding

An in-situ restoration and aquaculture technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., to achieve good results, solve the problem of offshore ecological environment pollution, and improve water quality.

Inactive Publication Date: 2006-05-10
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of comprehensively using microorganisms, macroalgae and filter-feeding shellfish to restore the habitat of shrimp ponds in situ to reduce the pollution of shrimp ponds themselves and the pollution of their drainage to the sea has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] From May to August 2004, with an area of ​​25×25m 2 The prawns are cultured in the water body, and the stocking density of prawns is 20,000 fish / mu. Wherein, adopt 4 water bodies of the present invention as treatment group, the stocking density of green clam and Gracilaria chrysanthemum in the water body is respectively 120kg / mu and 125kg / mu. The concentration of Bacillus in the complex microorganisms in the water body is 2.0×10 10 piece / m 3 . The name of the Bacillus product is "Lishengjian", the main components are Bacillus subtilis, Bacillus cereus and Bacillus licheniformis, and the ratio of Bacillus to photosynthetic bacteria is 1:2 . Four water bodies without any treatment were used as the control group.

[0022] The results show that, in addition to increasing the output of green clams and Gracilaria, the survival rate of prawns has increased by 19.37%, the output of prawns has increased, and the input-output ratio has increased by 38.52%; the water quality ...

Embodiment 2

[0028] From May to August 2004, with an area of ​​50×50m 2 The stocking density of prawns is 30,000 tails / mu, the stocking densities of green clams and Gracilaria chrysanthemum are 60kg / mu and 240kg / mu respectively, and the concentration of bacillus in the complex microorganisms in the water body is 1.5×10 10 piece / m 3 . Others are with embodiment 1.

[0029] The results showed that, in addition to increasing the output of green clams and Gracilaria, the survival rate and yield of prawns were increased, and the input-output ratio increased by 54.92%. The water quality of shrimp ponds was significantly improved, and TN, NH 4 -N, NO 3 -N, NO 2 -N and TP concentrations were significantly lower than the control, by more than 20%, 16%, 33%, 28% and 12% respectively; The amount of deposition is reduced by more than 46%. At the same time, the utilization rate of N and P in the breeding system increased by 1 times and 1.5 times respectively.

[0030] The data in Table 4-Table 6 r...

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Abstract

The invention discloses a method for in-situ repairing of water-quality environment in aquaculture, which is characterized in that: after a week of pool clearing, putting composite microbe into the pool, culturing prawn for a month, then putting cyclina sinensis into the pool, culturing gracilaria lichenoides after half a month, and adding composite microbe every 7-15 days. The composite microbe must contain bacillus and photosynthetic bacterium, the quantitative proportion of which is 1: 2. The density of bacillus is no less than 1.5* 1010 individual / m3. The invention is characterized in that repairing the pool environment with shellfish-algae- microbe system, the organic contaminant and eutrophication inorganic nutrient salt in water decrease, and it not only solves the self-pollution problem in culturing pool, but also solves the problem that the culturing wastewater contaminates the offshore ecologic environment. The prawn growing environment is largely improved, thus the prawn survival rate and growth rate is increased.

Description

technical field [0001] The invention relates to a method for in-situ restoration of prawn pond habitat by using biological means to control and reduce the pollution of aquaculture to itself and the surrounding environment—a method for in-situ restoration of water quality in aquaculture. Background technique [0002] In recent years, people have paid more and more attention to the pressure of aquaculture on the environment. In addition to the impact of internal environmental factors in the aquaculture system on the growth of aquaculture organisms, the impact of aquaculture wastewater discharged from shrimp aquaculture ponds on the offshore environment has also received increasing attention. At present, the highly intensive farming methods adopted by many countries and regions in the world use biological methods to reduce sewage discharge by establishing special breeding wastewater treatment systems. In these treatment systems, the different functions of filter-feeding shellfi...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
Inventor 董双林田相利马甡王芳董云伟
Owner OCEAN UNIV OF CHINA
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