System and method for enhancing degradation of pollutants at low temperature

Abstract

The invention belongs to the technical field of water purification, and particularly relates to a system and a method for enhancing pollutant degradation at low temperature. The system comprises an wetland, magnetic materials and guide plates, wherein the magnetic materials are vertically arranged in the artificial wetland in an up-and-down staggered manner, and in an overlapped area of two adjacent magnetic materials and an area close to the ground, the guide plates are adopted to replace a part of the magnetic materials, so a magnetic field is uniformly distributed; and the magnetic materials and the guide plates form a blocking device, so sewage forms waveform subsurface flow in the artificial wetland. On the basis of a magnetic effect generated by introduction of the magnetic materials, a microbial cell membrane structure and a framework can be changed, so certain microorganisms generate higher resistance to a low-temperature condition to adapt to the low-temperature environment, and sewage can be in a waveform flow state in the artificial wetland and is in more sufficient contact with a matrix through the waveforms of the magnetic materials which are distributed in a staggered manner; and the system is suitable for treating urban domestic sewage and industrial wastewater with a temperature of 4-15 DEG C.

Description

technical field

[0001] The invention belongs to the technical field of water body purification, and in particular relates to a system and method for enhancing pollutant degradation at low temperature. Background technique

[0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] In recent years, emerging technologies related to sewage treatment have emerged in an endless stream, and constructed wetlands have attracted widespread attention due to their advantages such as low investment, stable effect, convenient management and environmental friendliness. However, the low temperature environment reduces the activity of microorganisms and plants in the wetland or even dies. Due to the reduction of microbi...

Examples

Embodiment 1

[0054] According to the system of the present invention, a small wave-shaped subsurface flow artificial wetland test device is constructed in the laboratory, which is a cuboid with a length of 100 cm, a width of 30 cm, and a height of 60 cm.

[0055] Planting plants, a fine sand layer, a mixed layer of filler and waste magnetite, a supporting layer and an aeration device are sequentially arranged in the constructed wetland from top to bottom. The length of the water inlet pipe in the constructed wetland is 20cm, the diameter of the water inlet hole is 0.7cm, and the surface is wrapped with gauze. The upper part of this constructed wetland is planted with Siberian irises. The fine sand layer is composed of fine sand with particle size <0.3cm, and its thickness is 10cm. The supporting layer is composed of gravel with a particle size of 6-8cm, and its thickness is 15cm. The thickness of the mixed layer is 35cm. This layer is filled with a mixture of gravel and waste magnetite. ...

Embodiment 2

[0059] In a suburb of Shaanxi Province, an experimental artificial wetland was constructed according to the method described in this patent. The artificial wetland is 8.4m long, 3m wide, and 2.1m high.

[0060] Planting plants, a fine sand layer, a mixed layer of filler and waste magnetite, a supporting layer and an aeration device are sequentially arranged in the constructed wetland from top to bottom. The length of the water inlet pipe in the constructed wetland is 80cm, and the surface is wrapped with gauze. Cress is planted on the upper part of this constructed wetland. The fine sand layer is composed of fine sand with particle size <0.5cm, and its thickness is 30cm. The supporting layer is composed of gravel with a particle size of 8-10 cm, and its thickness is 40 cm. The thickness of the mixed layer is 140cm. This layer is filled with a mixture of gravel and waste magnetite. The diameter of the mixture is 3-5cm. The ratio of magnetite to gravel is 1:3. A total of six ...

technical field

[0001] The invention belongs to the technical field of water body purification, and in particular relates to a system and method for enhancing pollutant degradation at low temperature. Background technique

[0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] In recent years, emerging technologies related to sewage treatment have emerged in an endless stream, and constructed wetlands have attracted widespread attention due to their advantages such as low investment, stable effect, convenient management and environmental friendliness. However, the low temperature environment reduces the activity of microorganisms and plants in the wetland or even dies. Due to the reduction of microbi...

Examples

Embodiment 1

[0054] According to the system of the present invention, a small wave-shaped subsurface flow artificial wetland test device is constructed in the laboratory, which is a cuboid with a length of 100 cm, a width of 30 cm, and a height of 60 cm.

[0055] Planting plants, a fine sand layer, a mixed layer of filler and waste magnetite, a supporting layer and an aeration device are sequentially arranged in the constructed wetland from top to bottom. The length of the water inlet pipe in the constructed wetland is 20cm, the diameter of the water inlet hole is 0.7cm, and the surface is wrapped with gauze. The upper part of this constructed wetland is planted with Siberian irises. The fine sand layer is composed of fine sand with particle size <0.3cm, and its thickness is 10cm. The supporting layer is composed of gravel with a particle size of 6-8cm, and its thickness is 15cm. The thickness of the mixed layer is 35cm. This layer is filled with a mixture of gravel and waste magnetite. ...

Embodiment 2

[0059] In a suburb of Shaanxi Province, an experimental artificial wetland was constructed according to the method described in this patent. The artificial wetland is 8.4m long, 3m wide, and 2.1m high.

[0060] Planting plants, a fine sand layer, a mixed layer of filler and waste magnetite, a supporting layer and an aeration device are sequentially arranged in the constructed wetland from top to bottom. The length of the water inlet pipe in the constructed wetland is 80cm, and the surface is wrapped with gauze. Cress is planted on the upper part of this constructed wetland. The fine sand layer is composed of fine sand with particle size <0.5cm, and its thickness is 30cm. The supporting layer is composed of gravel with a particle size of 8-10 cm, and its thickness is 40 cm. The thickness of the mixed layer is 140cm. This layer is filled with a mixture of gravel and waste magnetite. The diameter of the mixture is 3-5cm. The ratio of magnetite to gravel is 1:3. A total of six ...

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