In-situ restoring method of eutrophic pond culture water

A technology of eutrophication and in-situ restoration, applied in chemical instruments and methods, botanical equipment and methods, fish farming, etc., can solve problems such as hazards, water transparency reduction, fish death, etc., and achieve low management technical requirements , good water quality improvement effect, and appropriate engineering quantity

Inactive Publication Date: 2011-06-22
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The eutrophication of pond aquaculture water destroys the balance of the original ecosystem of the water body, leading to the destruction of the structure of the water body ecosystem, the function of the water body is degraded, the algae grows wildly, causing a large number of fish to die, the water body is black and smelly, and the transparency of the water body is greatly reduced. Affects the landscape and water quality of water bodies
At the same time, due to the deterioration of water quality, the nutritional quality of fish has declined and some toxic substances produced in the process of eutrophication have harmful effects on fish and human health, affecting the normal development of economy and society.

Method used

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  • In-situ restoring method of eutrophic pond culture water
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  • In-situ restoring method of eutrophic pond culture water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the method for in-situ restoration of eutrophication pond culture water, carries out the following steps successively:

[0020] 1), plant pre-cultivation: wash and straighten the hornwort collected from the wild, straighten every 3 to 4 hornworts into a canopy, and each canopy has no less than 10 tender heads. ), the Hoagland's nutrient solution of the international hydroponics standard is used for domestication and cultivation for 8 to 10 days to obtain the pre-cultured hornwort, which can be used for transplanting in the following steps.

[0021] 2), detection of NH in the treated waters 4 + -N concentration, when the NH in the treated water 4 + - When the N concentration is ≥0.6mg / L, it is necessary to set up pretreatment to reduce ammonia toxicity, specifically: release nitrifying bacteria with a microbial order of magnitude of 2.5-4.5LogMPN / mL into the water to be treated.

[0022] Nitrifying bacteria can be purchased, for example, from Bioform Co...

example 1

[0029] The raw water for the experiment was taken from a fish pond in the suburbs of Huzhou, Zhejiang Province, to prepare slightly eutrophic pond culture sewage, and the bottom sludge was taken from the bottom of the same fish pond. Total nitrogen (TN), ammonia nitrogen (NH 4 + ), nitrate nitrogen (N0 3 - ), nitrite nitrogen (N0 2 - ) and total phosphorus (TP) concentrations were 1.5mg / L, 0.40mg / L, 0.9mg / L, 0.201mg / L, 0.49mg / L, respectively. The thickness of the bottom mud was set at 20 cm.

[0030] The following experimental groups and each control group are set to be carried out in a container with a bottom area of ​​1m*1m, and the total height of sewage and sediment in the container is 1.2m; all experiments are carried out at room temperature of 20-25°C.

[0031]Carrying out sewage treatment according to the method for in-situ restoration of eutrophication pond culture water of the present invention is called experimental group, specifically: the time of step 1) plan...

example 2

[0041] The raw water for the experiment was taken from a fish pond in the suburbs of Huzhou, Zhejiang to prepare moderately eutrophic pond culture wastewater, and the bottom sludge was taken from the bottom of the same fish pond. Total nitrogen (TN), ammonia nitrogen (NH 4 + ), nitrate nitrogen (N0 3 - ), nitrite nitrogen (N0 2 - ) and total phosphorus (TP) concentrations were 4.3mg / L, 0.54mg / L, 3.0mg / L, 0.751mg / L, 0.9mg / L, respectively. The thickness of the bottom mud was set at 20 cm.

[0042] The following experimental groups and each control group are set to be carried out in a container with a bottom area of ​​1m*1m, and the total height of sewage and sediment in the container is 1.2m; all experiments are carried out at room temperature of 25°C.

[0043] Carrying out sewage treatment according to the method for in-situ restoration of eutrophication pond culture water of the present invention is called experimental group, specifically: the time of step 1) plant pre-c...

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Abstract

The invention discloses an in-situ restoring method of eutrophic pond culture water. The in-situ restoring method comprises the following steps: 1) plant pre-culture: straightening 3-4 stalks of ceratophyllum demersum into 1 clump, putting 1 clump of ceratophyllum demersum in Hoagland nutrient solution to carry out acclimation and cultivation for 8-10 days so that pre-cultured ceratophyllum demersum is obtained; 2) plant transplantation: transplanting and inserting the pre-cultured ceratophyllum demersum in substrate sludge of water area to be treated, wherein 2-10kg of pre-cultured ceratophyllum demersum is set in the water area to be treated / m<3>; 3) putting bioactivators in the water area to be treated, wherein 4-6g of bioactivators is put in the water area to be treated / m<3>; and 4) controlling the coverage rate of the ceratophyllum demersum not to exceed 60%-80%. By using the method, the biological in-situ restoration of the eutrophic pond culture water can be achieved.

Description

technical field [0001] The invention relates to a method for treating cultured water in eutrophic ponds. Background technique [0002] Due to the excessive addition of artificial feed, the main nutrients such as nitrogen and phosphorus in the pond culture are excessive, resulting in eutrophication of the water body, which has become a prominent environmental contradiction in the current freshwater culture model, directly related to the economic benefits of pond culture and the surrounding waters. water quality. The eutrophication of pond aquaculture water destroys the balance of the original ecosystem of the water body, leading to the destruction of the structure of the water body ecosystem, the function of the water body is degraded, the algae grows wildly, causing a large number of fish to die, the water body is black and smelly, and the transparency of the water body is greatly reduced. Affects the landscape and water quality of water bodies. At the same time, due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32A01G33/00A01K61/00
CPCY02A40/81Y02W10/10
Inventor 吴湘叶金云
Owner HUZHOU TEACHERS COLLEGE
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