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Marine culture water compound cyclic purification system

A technology of mariculture and combined circulation, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as pollution sources, artificial wetland system blockage, and low water purification efficiency. To achieve the effect of increasing the dissolved oxygen content

Inactive Publication Date: 2013-02-06
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, water supply, water quality protection, and wastewater treatment in the process of industrial aquaculture have always been bottlenecks restricting the development of this technology. In addition, the discharge of industrial marine aquaculture wastewater has also made it an important source of pollution in the surrounding sea areas.
In recent years, there have been some reports on using artificial wetlands to recycle industrial marine aquaculture water. However, most of the existing patents and related applications simply use artificial wetlands to treat aquaculture water. Compared with biological treatment technology, its water purification efficiency is relatively low. At the same time, due to the high content of suspended matter in the aquaculture wastewater, it is easy to cause blockage of the constructed wetland system; in addition, this kind of method only aims to treat the water to meet the aquaculture standard, and rarely considers how to recover the remaining energy in the aquaculture wastewater

Method used

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  • Marine culture water compound cyclic purification system
  • Marine culture water compound cyclic purification system
  • Marine culture water compound cyclic purification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] According to the amount of water in the mariculture pond and the breeding density, set the appropriate daily circulation ratio r, and calculate the circulation treatment water volume, and the circulation treatment water volume is calculated by r × the water volume of the culture pond (M); for the usual culture pond, the daily circulation ratio r can be set 20%~40%d -1 .

[0045] The main functional units of this system are primary sedimentation unit 1, contact oxidation unit 2, shellfish ecological pond unit 3, and push flow constructed wetland unit 4. Calculate the area of ​​each unit according to the formula: area (S) = flow rate (V) × residence time (T) ÷ depth (H), and then calculate the length and width of each unit according to the appropriate aspect ratio (L:B). Among them, the aspect ratio of primary precipitation unit 1 is 1:2~2:1, the water depth is 1~1.5m, and the residence time is 1~2h; the aspect ratio of contact oxidation unit is 1:1~3:1, the water depth ...

Embodiment 2

[0051] This embodiment is aimed at an area of ​​1000m 2 , the Penaeus vannamei culture pond with a water depth of 1.6m, the circulation ratio is 20% per day, that is, the treated water volume is 13.33m 3 / h. Reinforced concrete pipes with a diameter of 300mm are used to connect each processing unit. The construction of each processing unit is as follows:

[0052] Primary sedimentation unit: depth 1.8m, water depth 1.5m, length 3m, width 6m, residence time 2h. The front and back ends are respectively provided with 0.3m long inlet and outlet weirs, the bottom of the inlet weir is connected with the sedimentation unit, and the top of the outlet weir is connected with the sedimentation unit. Set up 7×13 supports at an interval of 0.5m in the primary precipitation unit, and the supports are iron discs with a diameter of 0.4m welded on iron steel pipes and a height of 0.2m, and the surface is painted with anti-rust paint. Place a sedimentation inclined tube above the support. Th...

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Abstract

The invention relates to a marine culture water compound cyclic purification system which comprises an initial precipitation unit, a contact oxidation unit, a shellfish ecological pond unit and a plug flow type constructed wetland unit. The marine culture effluent enters into the initial precipitation unit to precipitate and then a mass of suspended solids are removed; ammoniation and nitration reactions are realized by the initial precipitation unit through microbial action; the effluent of the contact oxidation unit is conditioned by the shellfish ecological pond unit; the matrixes filled in the plug flow type constructed wetland unit is capable of absorbing and gathering the nitrogen and phosphorus pollutants in the water; and after the cyclic treatment, the water flows back to a marine culture pond. According to the seawater quality treatment system, the biological treatment technology, the ecological restoration technology and the ecological treatment technology are integrated and the advantages of the three technologies can be fully exploited, so that the effect of compound purification is achieved and the maximization of the comprehensive benefit is promoted.

Description

technical field [0001] The invention relates to a method and a system for circulating and purifying water for ex-situ mariculture, in particular to a method and a system suitable for the transformation of a high-density industrial mariculture system so as to realize the recycling of aquaculture water. Background technique [0002] Marine aquaculture occupies an important position in the national economic development. In recent years, due to the advancement of urbanization and the lack of space for aquaculture in tidal flats, industrial mariculture, as an intensive and high-yield aquaculture technology that can meet the needs of intensive production and meet the viewpoint of sustainable development, has been gradually promoted. With factory farming, the water quality, water temperature, feeding amount, etc. can be manually controlled, which can greatly save the area occupied, and has the advantages of short breeding cycle, high output and product price. However, problems suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 陈雪初安阳何圣兵张月平戴雅奇
Owner SHANGHAI JIAO TONG UNIV
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