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Aquaculture wastewater treatment system and method

A breeding wastewater and treatment system technology, applied in animal husbandry wastewater treatment, multi-stage water treatment, biological water/sewage treatment, etc., can solve problems such as difficult to meet treatment requirements, and achieve the effect of COD removal

Pending Publication Date: 2017-10-20
北京创迪环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the A / O treatment method is difficult to meet the treatment requirements of COD400mg / L and ammonia nitrogen below 80mg / L for the treatment of aquaculture sewage.
[0004] This shows that the above-mentioned existing A / O processing method still has deficiencies, and needs to be further improved urgently

Method used

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  • Aquaculture wastewater treatment system and method
  • Aquaculture wastewater treatment system and method

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Embodiment 1

[0031] Refer to attached figure 1 As shown, the aquaculture wastewater treatment system of this embodiment includes a sump, a solid-liquid separator, a settling tank, a biological selection tank, an anoxic tank, a first aerobic tank, a first second settling tank, and a second aerobic tank connected in sequence. pond, second secondary sedimentation pond and clear water pond.

[0032] Wherein, the outlet of the first aerobic tank is also provided with a first return pipe for returning the mixed solution to the anoxic tank. The outlet of the first secondary sedimentation tank is also provided with a second return pipe for returning sludge to the first aerobic tank; the outlet of the second secondary sedimentation tank is also provided with a second return pipe for returning sludge to the second aerobic tank The third return pipeline; the outlet of the first secondary sedimentation tank is also provided with a fourth return pipeline for returning sewage to the biological selectio...

Embodiment 2

[0044] Refer to attached figure 2 As shown, the difference between the second embodiment and the first embodiment is that a buffer tank and an anaerobic tank are sequentially arranged between the sedimentation tank and the biological selection tank. Correspondingly, when treating sewage, the raw water after sedimentation treatment from the sedimentation tank first enters the buffer tank, and then pumps from the buffer tank into the anaerobic tank, and stays in the anaerobic tank for 1 ~5 days, after the reaction occurs, enter the biological selection pool. The remaining parts are the same as those in the first embodiment above, and will not be repeated here.

[0045] The present invention can thoroughly solve the problem that ammonia nitrogen in the aquaculture sewage is difficult to effectively remove by adopting the above two aquaculture wastewater treatment systems and corresponding treatment methods, and can also effectively remove COD at the same time, and the water ene...

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Abstract

The invention discloses an aquaculture wastewater treatment system. The a aquaculture wastewater treatment system comprises a water collecting tank, a solid-liquid separator, a settling basin, a bio-selecting tank, an anoxic pond, a first aerobic tank, a first secondary sedimentation tank, a second aerobic tank, a second secondary sedimentation tank, and a clear water tank which are connected successively; the outlet of the first aerobic tank is provided with a first backflow pipeline which is used for backflow of mixed solution into the anoxic pond; the outlet of the first secondary sedimentation tank is provided with a second backflow pipeline which is used for backflow of sludge into the first aerobic tank; the outlet of the second secondary sedimentation tank is provided with a third backflow pipeline which is used for backflow of sludge into the second aerobic tank; the outlet of the first secondary sedimentation tank is provided with a fourth backflow pipeline which is used for backflow of sewage into the bio-selecting tank; and the outlet of the second secondary sedimentation tank is provided with a fifth backflow pipeline which is used for backflow of sewage into the bio-selecting tank. The invention also discloses a treatment method of aquaculture wastewater. The aquaculture wastewater treatment system and the method are capable of solving a problem in the prior art that removing of ammonia and nitrogen in aquaculture wastewater is difficult to realize, COD can be removed effectively at the same time, after treatment, the COD content of sewage is reduced to be lower than 400mg / L, and ammonia and nitrogen content is reduced to be lower than 5mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a breeding wastewater treatment system and method. Background technique [0002] At present, the treatment process of aquaculture wastewater mainly adopts A / O method, that is, anoxic / aerobic biochemical treatment method. This sewage treatment process can not only remove BOD5 and CODcr in sewage, but also effectively remove nitrogen compounds in sewage. For example, in the A-section pool, it is also called anoxic pool or hydrolysis pool. The mechanism of hydrolysis is from a chemical point of view. Most compounds will undergo hydrolysis reactions when they contact water under certain conditions. Hydrolysis reactions can cause covalent bonds to occur. Change and break, that is, the compound has changed in molecular structure and morphology. Biohydrolysis relies on the catalysis of biological enzymes to accelerate the reaction, and the catalytic reaction speed under the co...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/20
CPCC02F9/00C02F2001/007C02F2103/20C02F3/301C02F1/001C02F2301/08
Inventor 石长江
Owner 北京创迪环境科技有限公司
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