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Comprehensive organism repairing method of eutrophication seawater cage culture zone

A technology of eutrophication and cage culture, which is applied in the field of bioremediation in eutrophic sea areas, can solve problems such as secondary pollution of water bodies, and achieve high economic value, good environment and economic benefits

Inactive Publication Date: 2010-09-01
OCEAN UNIV OF CHINA
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Problems solved by technology

The bait debris left in the breeding process and the feces produced by farmed animals will continue to deposit in the bottom mud and become an important source of bottom mud pollution; and there is a strong material exchange between the bottom water body and the surface bottom mud. The pollutants deposited in the sediment will re-enter the water body, resulting in secondary pollution of the water body
However, the existing research content often only focuses on the improvement of the environmental quality of one of the media, or the water body, or the sediment
In order to fundamentally reduce the eutrophication and organic pollution of the aquaculture environment and realize the sustainable and healthy development of the aquaculture environment, it is necessary to use a comprehensive restoration method to realize the simultaneous removal of organic eutrophication and organic pollution in water bodies and sediments. see reports on this

Method used

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  • Comprehensive organism repairing method of eutrophication seawater cage culture zone
  • Comprehensive organism repairing method of eutrophication seawater cage culture zone

Examples

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Effect test

Embodiment 1

[0013] In the prawn breeding base of Ocean University of China, 5.0Kg asparagus was suspended and raised in a 1m (length) × 1m (width) × 1.5m (deep) cage, and 200 scallops were added to the bottom of the cage ( Chlamys fareri), add 2.0Kg of immobilized microorganisms obtained by mixing photosynthetic bacteria, bacillus, subdigestive bacteria and nitrifying bacteria in equal weight ratios in the net cage water body. Regular monitoring of various water quality and sediment indicators. The water quality and mud quality monitoring indicators of each bioremediation system on the 4th day are shown in Table 1. Among them, the control group is a treatment system without adding any remediation organisms. For the control group without remediation, the comprehensive environmental quality of water body and sediment is poor, both exceeding the national Class IV seawater quality and Class III marine sediment quality standards. After 4 days of restoration, compared with the control group, i...

Embodiment 2

[0017] In the turbot breeding base of Ocean University of China, 0.5Kg laver was suspended in a 1m (length) × 1m (width) × 1.5m (depth) cage, and 20 Pacific oysters (Crassostrea gigas) were added to the bottom of the cage. Add 0.2Kg of immobilized microorganisms obtained by mixing photosynthetic bacteria, bacillus, subdigestive bacteria and nitrifying bacteria in equal weight proportions into the water body of the tank. Regular monitoring of various water quality and sediment indicators. The water quality and mud quality monitoring indicators of each bioremediation system are shown in Table 2. Among them, the control group is the treatment system without adding any restoration organisms. Similar to Example 1, in the control group without restoration, the comprehensive environmental quality of water body and sediment is poor, and DIN\, PO in water body 4 - Both P and COD exceed the national Class IV seawater quality standards, and the TOC in the substrate exceeds the national...

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Abstract

The invention discloses a comprehensive organism repairing method of an eutrophication seawater cage culture zone, which is characterized by comprising the following steps of: hanging large-scale seaweeds on the upper part of a water body in a cage culture zone by using immobilized microorganisms, the large-scale seaweeds and filter-feeding bivalves as a combined repairing organism; putting the filter-feeding bivalves capable of rapidly absorbing and converting inorganic nitrogen and phosphorus eutrophication substances in the water body to the bottom of the culture zone; putting the immobilized microorganisms partially depositing to the surface layer of a bottom material of a culture field; and intensifying the degradation of organic matters and the nitrification velocity of nitrogen in the water body or substrate sludge through the oxidization and the nitrification. The method has the characteristics that firstly, the comprehensive organism repairing method which uses the large-scale seaweeds, the filter-feeding bivalves and immobilized nitrobacteria as a main organism can eliminate the eutrophication substances and organic pollutants in the water body and the bottom material; and secondly, the large-scale seaweeds and the filter-feeding bivalves with higher economic value can be obtained while eliminating the pollutants, thereby great environment and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of bioremediation in eutrophic sea areas, and in particular relates to a comprehensive bioremediation method for eutrophic seawater cage culture areas. Background technique [0002] Cage aquaculture is a representative way of high-density and intensive development of my country's marine aquaculture industry. While greatly improving the aquaculture capacity and economic benefits, it also brings serious environmental problems, such as a large amount of aquaculture animal bait produced during the aquaculture process. , excrement and other organic pollutants, as well as aquaculture wastewater containing high concentrations of nitrogen, phosphorus and other eutrophic substances, have seriously polluted the aquaculture sea area. my country's aquaculture industry continues to develop, and the degree of eutrophication in coastal waters is expanding and aggravating, which has a serious impact on the marine ecological e...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34C02F103/08
Inventor 梁生康石晓勇韩秀荣张桂成
Owner OCEAN UNIV OF CHINA
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