Upwelling artificial wetland for removing nitrogen, phosphorus and antibiotics in aquaculture wastewater

A technology for artificial wetlands and aquaculture wastewater, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. The effect of hydraulic retention time, complete adsorption or decomposition, and avoidance of hydraulic dead zone

Inactive Publication Date: 2014-09-03
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason why we did not choose the downstream hydraulic operation method is mainly due to the following two considerations: 1. Our previous research found that since most antibiotics have a certain water solubility, the antibiotics that have been adsorbed in the downstream constructed wetland are easily absorbed by the new influent water. Take away, especially in the rainy season; 2 The hydraulic retention time of the downstream constructed wetland is short, and it is difficult for antibiotics to fully decompose

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  • Upwelling artificial wetland for removing nitrogen, phosphorus and antibiotics in aquaculture wastewater

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specific Embodiment approach 1

[0019] Embodiment 1: The present invention adopts the vertical flow constructed wetland mode, and the system packing layer includes an upper layer and a lower layer, the upper layer is the red soil in Fujian area selected for the red soil layer (4), and the lower layer is the oyster shell-waste brick mixed packing layer ( 3), in which oyster shells are by-products of coastal farming and fishing in Fujian, the volume ratio of oyster shells and waste bricks is about 1:1, and the particle size range: 10-30 mm. The red soil layer (4) is planted with reeds (5). The reeds have high growth density, developed root systems and are closely combined with the filler layer.

specific Embodiment approach 2

[0020] Specific embodiment 2: The present invention adopts an upflow process, and a water inlet pipe (2) is arranged at the bottom of the constructed wetland system (1), and the bottom enters the water, first through the mixed packing layer (3), and then through the red soil layer (4) and The plant growth layer (5) is finally discharged from the water outlet pipe (6).

specific Embodiment approach 3

[0021] Embodiment 3: When the hydraulic load is set to 0.02 - 0.1 m 3 / (m 2 d), the device of the present invention can meet the requirement of simultaneous treatment of nitrogen, phosphorus and antibiotics.

[0022] Embodiment 4: Set the antibiotic concentration at 300 μg L -1 Hereinafter, the device of the present invention can meet the requirement of simultaneous removal of nitrogen, phosphorus and antibiotics.

[0023] Embodiment 5: For the wetland plant reed, according to seasonal changes, harvest once from March to May, twice from June to August, once from September to November, and not harvested from December to February.

[0024] The present invention will be described in further detail below by means of examples.

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Abstract

The invention relates to an upwelling artificial wetland for removing nitrogen, phosphorus and antibiotics in aquaculture wastewater, designs sewage treatment equipment which is an ecological treatment device of an artificial wetland and suitable for removing combined pollutions caused by the nitrogen, the phosphorus and the antibiotics in the aquaculture wastewater, and belongs to a vertical flow artificial wetland device. According to the upwelling artificial wetland, oyster shells, waste bricks and red earth, which have strong nitrogen and phosphorus adsorption capacity and high microorganism containing quantity, and are taken as main wetland fillers; wetland plant reeds which have good pollution resistance are planted. The upwelling is taken as a hydraulic transmission mode, so that the problems of hydraulic dead zone, insufficient nitrogen removal ability, poor antibiotic interception ability and poor rainstorm impact resistance existing in the traditional operation mode are effectively solved. Meanwhile, the upwelling artificial wetland has the advantages of being low in cost, small in land occupation, simple in structure, convenient in operation management and the like.

Description

technical field [0001] The invention patent designs an upflow constructed wetland for removing nitrogen, phosphorus and antibiotics in aquaculture wastewater. It belongs to the field of water pollution control. Background technique [0002] In recent years, due to the increasing market demand brought about by urbanization, the large-scale livestock and poultry breeding industry has developed rapidly. The rapid development of the pig breeding industry meets the needs of the people's lives and promotes the development of the rural economy. However, the problem of eutrophication caused by the nitrogen and phosphorus discharge of pig wastewater is becoming more and more serious. In addition, antibiotics have a long history of being used as drugs and food additives in livestock and poultry farming, and the dosage is gradually increasing. The survey found that about 70% of antibiotics are currently used in animal farming, and a considerable part of antibiotics cannot be absorbed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 黄栩刘超翔王振李可
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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