A multi-combination method for treating tail water of industrial mariculture
A mariculture and tail water technology, applied in multi-stage water treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problem that it is difficult to meet the discharge water quality indicators, the volume of treated water is limited, and the area occupied is large and other problems, to achieve the effect of good tail water treatment, small footprint and low operating cost
Active Publication Date: 2022-03-22
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology
At present, in actual production, mariculture wastewater is generally discharged directly into the sea after simple primary sedimentation, and it is difficult to meet the requirements of the discharge water quality index
For the related design of mariculture wastewater, there are disadvantages such as relatively long treatment cycle, limited effect, large floor area, small controllability, and limited water volume per unit time.
Method used
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Embodiment 1
[0069] The present invention is tested in aquaculture enterprises in Tanggu District, Tianjin. According to the aquaculture tail water treatment process designed in the present invention, an indoor treatment shed is built to construct a culture tail water buffer pool-physical filtration-biofilm reactor-algae treatment pool for continuous use The system is used for research on the reuse of aquaculture water after purification. The initial concentration of inorganic nitrogen (ammonia nitrogen, nitrite, nitrate) in aquaculture water is 10mg / L, the initial concentration of total nitrogen is 15mg / L, the initial concentration of phosphate is 0.8mg / L; the initial concentration of total phosphorus is 1.2mg / L, Suspended solids up to 100mg / L. After being treated by the tail water treatment system, the removal rate of inorganic nitrogen, total nitrogen, phosphate, total phosphorus, COD and suspended matter can reach more than 90%. After treatment, the total nitrogen of the tail water is...
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The invention belongs to the technical field of mariculture, in particular to a multi-combination method for treating industrial mariculture tail water. Including: sedimentation and pretreatment of aquaculture tail water in a buffer tank; engineering treatment of aquaculture tail water after sedimentation and pretreatment; elimination of residual nitrogen and phosphorus nutrients in an ecological treatment unit. The invention combines high-efficiency engineering water treatment and ecological water treatment technology, can effectively treat the tail water produced by high-density industrial mariculture, and can reach the standard discharge after treatment, and has the advantages of small footprint and high removal efficiency of nutrients such as nitrogen and phosphorus , low energy consumption, and low operating costs.
Description
technical field [0001] The invention belongs to the technical field of mariculture, in particular to a multi-combination method for treating industrial mariculture tail water. Background technique [0002] China is a big country in aquaculture, and its aquaculture production ranks first in the world. According to the 2019 China Fishery Statistical Yearbook, my country's aquaculture output in 2018 was 49.9106 million tons, far exceeding the catch. In the past two decades, the mariculture industry has developed rapidly in China. Land-based seawater factory aquaculture, especially the recirculating aquaculture model, can achieve high-density farming of aquatic organisms such as fish and shrimp by optimizing the aquaculture water environment. At the same time, the aquaculture wastewater mixed with a large amount of residual bait, aquatic animal manure, input leached matter and metabolites is directly discharged into the environment or after simple treatment, which will easily c...
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IPC IPC(8): C02F9/14C02F11/122C02F103/08C02F103/20
CPCC02F9/00C02F11/122C02F1/50C02F2001/007C02F1/001C02F3/32C02F2103/20C02F2103/08C02F3/322C02F3/302C02F2301/08
Inventor 李贤刘鹰王朝夕李军王金霞马晓娜
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI