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Device for simulating iron-ammonia oxidation process of in-situ riparian zone soil and use method and application of device

A riparian zone, ammonia oxidation technology, applied in soil material testing, water testing, material inspection, etc., to achieve the effect of reasonable design, simple device structure and multiple functions

Active Publication Date: 2017-02-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved in the present invention are as follows: one is to confirm whether there is iron ammonia oxidation in the river course; the other is to explore the influence of nitrogen pollution, water quality deterioration and multi-factor changes on iron ammonia oxidation

Method used

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  • Device for simulating iron-ammonia oxidation process of in-situ riparian zone soil and use method and application of device
  • Device for simulating iron-ammonia oxidation process of in-situ riparian zone soil and use method and application of device
  • Device for simulating iron-ammonia oxidation process of in-situ riparian zone soil and use method and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A device for simulating the iron ammonia oxidation process of in-situ riparian soil, comprising a cylindrical transparent column, a halogen lamp 10 arranged on the upper part of the transparent column, a water storage tank 2 and a helium cylinder 1, the transparent column The body is a double-layer structure, the inner layer is connected with the water storage tank 2 through the water inlet pipe, and the constant flow pump 3 and the water inlet valve 4 are arranged on the water inlet pipe; the outer layer is connected with the helium cylinder 1 through the inlet pipe, and the outer layer is provided with a There is an annular sealing cover 5 that can seal the outer layer, and the bottom of the outer layer is filled with in-situ riparian soil 11 with a height of 30-40 cm. In a light-shielding environment, the side wall of the inner layer is provided with an inner outlet valve 6 that can adjust the liquid level of the outer layer, and the side wall of the outer layer is pr...

Embodiment 2

[0047] Indoor simulation experiment (investigate the changes of ammonia nitrogen, nitrate nitrogen and total nitrogen concentration in the water body in the simulation experiment device over time)

[0048] Experimental method steps:

[0049] (1) Within 2 hours, transport the soil in the riparian zone collected by the dredger back to the laboratory for transfer, and put them into the outer layer of the device described in Example 1, so that the thickness of the riparian zone soil in the outer layer reaches 30 -40 cm, fill with helium, cover with a sealed cover to form an anaerobic environment, and wrap the outer layer of soil with tinfoil to ensure that the soil in the river bank is in a shading environment, and shading treatment for two days;

[0050] (2) Collect the river water in the in-situ river channel and add it to the water storage tank, and introduce the river water in the water storage tank into the inner layer through the water inlet pipe through the constant flow pu...

Embodiment 3

[0055] Small test experiment (investigate the change of ferrous iron and ferric iron with time in the simulated experimental device)

[0056] test group:

[0057] Experimental method steps:

[0058] (1) Within 2 hours, transport the soil in the riparian zone collected by the dredger back to the laboratory for transfer, and put them into the outer layer of the device described in Example 1, so that the thickness of the riparian zone soil in the outer layer reaches 30 -40 cm, fill with helium, cover with a sealed cover to form an anaerobic environment, and wrap the outer layer of soil with tinfoil to ensure that the soil in the river bank is in a shading environment, and shading treatment for two days;

[0059] (2) Collect the river water in the in-situ river channel and add it to the water storage tank, and introduce the river water in the water storage tank into the inner layer through the water inlet pipe through the constant flow pump;

[0060] (3) Open the inner water out...

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Abstract

The invention discloses a device for simulating the iron-ammonia oxidation process of in-situ riparian zone soil and use method and application of the device. The device comprises a cylindrical transparent cylinder and a halogen lamp arranged at the upper portion of the transparent cylinder which is of a double-layer structure, the inner layer is connected with a water storage box through a water pipe, and a constant flow pump and a water inlet valve are arranged on the water pipe; the outer layer is connected with a helium steel cylinder through an intake pipe, an annular sealing cover provided with a sealable outer layer is arranged above the outer layer, in-situ riparian zone soil 30-40cm in height is filled in the bottom of the outer layer, the outer layer is wrapped with tin foil paper from the outer side, an inner water outlet valve is arranged on the side wall of the inner layer, an outer water outlet valve is arranged on the outer wall of the outer layer, and a sediment sampling opening and a water sampling opening are respectively arranged in the position where the riparian zone soil is filled and the upper portion of the position where the riparian zone soil is filled. By the arrangement, velocity of iron-ammonia oxidation, abundance of iron-reducing bacteria, microbial community structures and water denitrification rate can be determined, and action mechanism of iron-ammonia oxidation and water denitrification rate are beneficially understood.

Description

technical field [0001] The invention belongs to the technical field of ecological engineering, and in particular relates to a device for simulating the iron ammonia oxidation process of in-situ riparian soil, a use method and an application. Background technique [0002] With the rapid development of my country's economy, the discharge of industrial and agricultural production and domestic sewage has gradually increased, and a large amount of nitrogen and phosphorus have entered rivers, lakes, reservoirs, bays, etc., resulting in a decrease in dissolved oxygen in water bodies, deterioration of water quality, and serious eutrophication. Severe environmental pollution has destroyed the ecological balance. Iron ammonium oxidation is a recently discovered method that can remove nitrogen in an anaerobic environment. Among them, iron-reducing bacteria are important denitrification microorganisms for iron ammonia oxidation, which exist in rice In fields, tidal wetlands, rivers and la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N33/18
CPCG01N33/18G01N33/24
Inventor 李正魁丁帮璟王浩覃云斌朱鸿杰杨建华张一品陈湜胡优优
Owner NANJING UNIV
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