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Treatment system for aquaculture wastewater with low carbon-nitrogen ratio and treatment method

An aquaculture and treatment system technology, applied in the fields of animal husbandry wastewater treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Less pollution, convenient and quick loading and unloading

Pending Publication Date: 2017-08-18
ZHEJIANG INST OF FRESH WATER FISHERIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that under the condition of low carbon-to-nitrogen ratio, the nitrogen removal rate of the traditional process is significantly reduced, and the process needs to be improved to ensure the nitrogen removal effect

Method used

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  • Treatment system for aquaculture wastewater with low carbon-nitrogen ratio and treatment method
  • Treatment system for aquaculture wastewater with low carbon-nitrogen ratio and treatment method
  • Treatment system for aquaculture wastewater with low carbon-nitrogen ratio and treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Example 1: Reference Figure 1~Figure 3, a treatment system for aquaculture wastewater with a low carbon-to-nitrogen ratio, including a nitrification device 1, an oxygen reduction device 7, a denitrification device 2, a wastewater storage device 3, a pipeline 4 for communication, and the wastewater in the above-mentioned The circulation pump 5 circulating in the device also includes an aeration device 6 arranged in the nitrification grid 11 of the nitrification device 1, the waste water flows through the nitrification device 1 first, and then flows through the denitrification device 2;

[0043] The nitrification device 1 is composed of a nitrification grid 11, and the nitrification grid 11 is filled with a nitrification filler 12, and the nitrification filler 12 is a plurality of suspension fillers 12-a, and the suspension filler 12-a includes several circles with the same center and a connecting portion connecting said circles;

[0044] The denitrification device 2 is...

Embodiment 2

[0047] Example 2: Reference figure 1 , figure 2 with Figure 4 The difference from Example 1 is that the nitrification filler 12 is an elastic filler 12-b suspended in the nitrification grid 11, and several branches extending from the periphery of the elastic filler 12-b are provided.

Embodiment 3

[0048] Embodiment 3: with reference to Table 1, refer to Figure 5 , Image 6 , a kind of aquaculture wastewater treatment method, is used for processing soft-shelled turtle culture wastewater, comprises the steps:

[0049] ①Microbial film formation: Inject aquaculture wastewater into the treatment system, and turn on the circulation pump to keep the treatment system in operation, adjust the circulation pump to circulate the aquaculture wastewater every 24 hours, keep the operating environment temperature at 25~30℃, and replace it every 3 days Half of the aquaculture wastewater, water samples were taken every other day to determine its NH 4 -N, NO 2 The concentration of -N and TN, after the concentration of the above substances stabilized, the film formation was completed. This process lasted for 4 weeks, and finally the NH in the water body was measured. 4 -N, NO 2 The values ​​of -N and TN were stable at 1.0~1.4mg / L, 0.05~0.07mg / L, 12~15mg / L, respectively, and the pH val...

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Abstract

The invention discloses a treatment system for aquaculture wastewater with a low carbon-nitrogen ratio and a wastewater treatment method and belongs to the technical field of biological wastewater treatment. The treatment system comprises a nitrification device, a denitrification device, a wastewater storage device, a pipeline and a circulation pump, wherein the nitrification device and the denitrification device are connected together; the pipeline is used for communicating; the circulation pump is used for making the wastewater flow in the device in cycle; the treatment method comprises the steps of (1) biofilm culturing, (2) circulating treatment, and (3) repeating. The wastewater treatment system and the wastewater treatment method are suitable for treatment of aquaculture wastewater with the low carbon-nitrogen ratio; a biofilm formed by bacterial communities can be formed on a filler; the removal rate on ammonia nitrogen, nitrite nitrogen and total nitrogen basically can be kept over 90%; the system is stable in operation, free of secondary pollution, convenient to maintain and easy to operate.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, in particular to a treatment system and method for aquaculture wastewater with a low carbon-to-nitrogen ratio. Background technique [0002] my country's aquaculture is mostly carried out in a high-density intensive factory farming model. The ammonia nitrogen and nitrite nitrogen content in the water of this farming model often seriously exceeds the standard, which has a destructive impact on the development of aquaculture. Initially, in order to maintain a good In such a breeding environment, farmers increase the frequency of water changes, which not only wastes water resources, but also directly discharges wastewater that endangers the surrounding water ecological environment. [0003] Among the two main methods for denitrification of aquaculture wastewater, the biological denitrification method has the advantages of low cost, no secondary pollution, and no damage to the ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F103/20
CPCC02F3/302C02F2103/20
Inventor 蔺凌云沈锦玉尹文林袁雪梅潘晓艺姚嘉赟徐洋王超
Owner ZHEJIANG INST OF FRESH WATER FISHERIES
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