Method of improving ecological environment of enclosed seawater pond

A technology for ecological environment and ponds, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Reduce water exchange efficiency and other issues, save manpower and material resources, energy and water consumption, facilitate operation and management, and reduce the number of water changes

Inactive Publication Date: 2008-04-02
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this is time-consuming and labor-intensive, and consumes a lot of manpower and material resources
If the water is changed too little or not in time (this is a phenomenon that often occurs in small tides), it is easy to cause a large number of benthic algae or planktonic algae to form water blooms or red tides, commonly known as pond turning, which affects the normal growth of economic animals; and If the water is changed too frequently, it will lead to increased costs
Another problem is that changing water in large-scale sea ponds often causes the discharged water to be reintroduced into aquaculture water, thereby reducing the efficiency of water exchange
Another method for improving the ecological environment of seawater ponds is to use water quality improvers or substrate improvers to inhibit the growth of phytoplankton, as disclosed in the Chinese invention patent No. 03126702.5 issued on October 20, 2004. The improver for the ecological environment of the bottom of the breeding pond and its use method can better improve the ecological environment of the pond culture, but the use of this improver can only play a short-term effect once, and it needs to be used every 10 to 20 days. Apply once, the cost is relatively high

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  • Method of improving ecological environment of enclosed seawater pond

Examples

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Embodiment 1

[0016] Embodiment one: From November 15th to December 12th, 2003, it was carried out in the seawater pond of Nantiantang Breeding and Development Company, Xiangshan County, Zhejiang Province. The depth is 0.9 meters, and the depth of the ring ditch is 1.8 meters. The laver seedling net uses the sea area seedling net and is directly hung on the seawater pond. 2 units are arranged on the ring ditch in the north and the south, and they are dried for 2 to 3 hours on November 19, November 22, November 27, December 2, and December 7.

[0017] The water quality factors such as dissolved oxygen, pH value and oxidation-reduction potential of the water body were measured with the YSI6600 water quality measuring instrument. After laver cultivation in the ponds, compared with the seaweed ponds in the comparison, they all increased by 10-30%. Inorganic nitrogen decreased from the initial 956.94 μg / L to 108 μg / L, the level of total inorganic phosphorus decreased from 19.96 μg / L to 2 μg / L, a...

Embodiment 2

[0019] Embodiment two: carried out in the seawater pond of Hepu, Xiangshan County, Zhejiang Province from March 12 to April 17, 2004. The pond is 135 meters * 40 meters, and runs north-south. The depth of the beach surface of the seawater pond is 0.8 meters, and the depth of the ring ditch is 1.8 meters. Laver seedling nets are provided by Ningbo University’s cold storage nets, which are directly hung in seawater ponds. The size of each laver seedling net is 2.4m x 2.4m, and 8 pieces form 1 set, and 2 sets are arranged on the north and south ring ditches respectively. , respectively on March 18, March 22, March 27, April 2, and April 7 for 2 to 3 hours.

[0020] The dissolved oxygen, pH value, oxidation-reduction potential and other water quality factors of the water body were measured with the YSI6600 water quality analyzer. After the seaweed cultivation in the ponds, compared with the seawater ponds in the control, they all increased by 10-30%. The analyzer determined that ...

Embodiment 3

[0021] Embodiment three: from November 2 to December 16, 2004, it was carried out in the seawater pond of Nantiantang Breeding and Development Company in Xiangshan County, Zhejiang Province. The pond was 67 meters * 40 meters, and the direction was north-south. The depth of the beach surface of the seawater pond is 0.9 meters, and the depth of the ring ditch is 1.8 meters. Laver seedling nets are provided by Xiangshan Longxin Laver Co., Ltd., which are taken from the sea area. After drying in the shade, they are directly hung in seawater ponds. The size of each laver seedling net is 2.4m x 2.4m, and 6 pieces form a set, respectively in the north and south circles. 2 units were arranged on each ditch, and they were dried for 2 hours on November 6, November 10, November 14, November 17, November 24, and November 30. On November 6, Laver was harvested on November 14, November 23, and December 6, and 238, 202, 175, and 211kg of dehydrated fresh vegetables were harvested, totaling ...

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Abstract

A method for improving the ecological environment of enclosed seawater pond features that the laver is cultured on the nets fixed to the floating frame and the ratio of the culture area to the whole seawater area is 1:10-30. It can prevent the eutrophication of seawater, improve water quality and increase the yield of laver.

Description

technical field [0001] The invention relates to a method for improving the ecological environment of puhai ponds. Background technique [0002] Most of the existing seawater ponds are mainly used for cultivating economic animals, such as shellfish such as razor clams and clams, as well as fish, shrimp and crabs. During the breeding process, the residual bait, animal corpses and excrement and excrement will increase the concentration of nutrients in the water, resulting in a decrease in dissolved oxygen in the water and an increase in the concentration of ammonia nitrogen, thereby destroying the ecological environment of the breeding water, especially the concentration of ammonia nitrogen. If it is too high, it will have a greater toxic effect on common economic animals. In addition, one or more types of benthic algae or planktonic algae often exist in the aquaculture water body, and when conditions are suitable, they will grow rapidly and their density will continue to incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00C02F3/00
CPCY02A40/81
Inventor 骆其君严小军周成旭裴鲁青
Owner NINGBO UNIV
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