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A microbial fuel cell coupled composite flow constructed wetland system for wastewater treatment

A constructed wetland system and fuel cell technology, applied in biochemical fuel cells, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as high COD concentration, surface water pollution, and difficult treatment, and achieve Solve water pollution, achieve no carbon emissions, and improve the effect of treatment

Active Publication Date: 2020-10-16
SHENGSHI LANDSCAPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of chemical oxygen demand (COD) in alcohol wastewater is as high as 20,000~30,000 mg / L, the content of suspended solids (SS) can reach 40,000 mg / L, and there are also pollutants such as nitrogenous compounds, biological bacteria, and organic acids. High difficulty
[0003] However, due to the high biodegradability and easy biodegradation of alcohol wastewater, traditional treatment methods include anaerobic biological treatment, aerobic biological treatment and their combined processes, etc., which can realize the treatment of alcohol wastewater, but the disadvantage of the above methods is that after treatment The COD concentration of alcohol wastewater is still high, even if the discharge meets the standard, it will still cause serious pollution to surface water bodies

Method used

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  • A microbial fuel cell coupled composite flow constructed wetland system for wastewater treatment
  • A microbial fuel cell coupled composite flow constructed wetland system for wastewater treatment
  • A microbial fuel cell coupled composite flow constructed wetland system for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1~6 As shown, a microbial fuel cell coupling composite flow constructed wetland system (MFC-CFCW system) for wastewater treatment includes a cylindrical pool body, and four partitions 10 are arranged in the pool body, and the partition boards 10 divide the pool The body is divided into 4 series units. The upper part of the side wall of one of the series units is provided with a water inlet, and the water inlet is connected with a water inlet pipe 1, and the upper part of the side wall of one of the series units is provided with a water outlet, and the water outlet is connected with a water outlet pipe 9; the height of the water outlet The height of the water inlet is lower than that of the water inlet, thereby forming a water level difference, which is conducive to the continuous and uniform flow of water. The waste water flows from the water inlet to the water outlet, and flows through all series units in a counterclockwise direction; along the directio...

Embodiment 2

[0063] Keep the structure of the MFC-CFCW system described in Example 1 unchanged, and only change the anode plate 4, cathode plate 6, biocompatible filler, conductive filler and wetland plants.

[0064] Described anode plate 4 and cathode plate 6 all adopt following steps to make:

[0065] (1) Soak the mature and sun-dried octagonal melon fruit in 20% NaOH solution for 30 h to remove the ash, then wash it with water until it is neutral and dry it, put it in a tubular electric resistance furnace, and heat it in a nitrogen atmosphere. carbonization at 200°C for 3 h; the flow rate of nitrogen into the tubular resistance furnace was 0.4 L / min, and the heating rate of the resistance furnace was 8°C / min;

[0066] (2) Soak the product obtained in step (1) in dilute hydrochloric acid with a mass fraction of 5% for 6 h, then separate the solid from the liquid, dry the solid, and grind it into powder to obtain the main ingredient powder;

[0067] (3) Mix the main ingredient powder, ca...

Embodiment 3

[0077] Keep the structure of the MFC-CFCW system described in Example 1 unchanged, and only change the anode plate 4, cathode plate 6, biocompatible filler, conductive filler and wetland plants.

[0078] Described anode plate 4 and cathode plate 6 all adopt following steps to make:

[0079] (1) Soak the ripe and sun-dried octagonal melon fruit in 30% NaOH solution for 20 h to remove the ash, then wash it with water until neutral and dry it, put it in a tubular electric resistance furnace, and heat it in a nitrogen atmosphere carbonization at 500°C for 2 h; the flow rate of nitrogen into the tubular resistance furnace was 0.6 L / min, and the heating rate of the resistance furnace was 10°C / min;

[0080] (2) Soak the product obtained in step (1) in dilute hydrochloric acid with a mass fraction of 15% for 4 h, then separate the solid from the liquid, dry the solid, and grind it into powder to obtain the main ingredient powder;

[0081] (3) Mix the main ingredient powder, carbon bl...

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Abstract

The invention discloses an artificial wetland system with coupling of microbial fuel cells and combined flow and used for treating waste water. The artificial wetland system comprises a pond body anda plurality of partitioning plates arranged in the pond body, wherein the pond body is equally divided into a plurality of serial units by the partitioning plates; the waste water takes on an alternative mode of ascending flow and descending flow, flows through all the serial units in sequence and is fully contacted with electrogenic microbes, self-made biocompatible fillers and wetland plant rootsystems so as to achieve the purposes of adsorbing, degrading and removing organic pollutants in the alcohol waste water. The artificial wetland system disclosed by the invention has the beneficial effects that electrode materials of the microbial fuel cells are self-made electrode pieces, so that the cell electrogenesis efficiency and the sewage treatment efficiency are improved; in addition, byall-new application of the self-made biocompatible fillers in the wetland, the treatment load of the artificial wetland is increased; and the artificial wetland system realizes combination of sewagetreatment, energy generation, energy storage and comprehensive utilization from the whole, and has the advantages of simple and reasonable structure, high treatment efficiency and low operation and maintenance cost and the like.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a microbial fuel cell coupled composite flow constructed wetland system for wastewater treatment. Background technique [0002] With the development of modern technology, alcohol is no longer only used in the production of wine, but is widely used in food, chemical, medical and other industries. At the same time, my country is actively developing ethanol gasoline as a vehicle fuel, and the production of alcohol will become higher and higher. With the increase of alcohol production and consumption, the alcohol wastewater generated in the production process has become one of the most serious sources of water pollution. The concentration of chemical oxygen demand (COD) in alcohol wastewater is as high as 20,000~30,000 mg / L, the content of suspended solids (SS) can reach 40,000 mg / L, and there are also pollutants such as nitrogenous compounds, biologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32H01M4/86H01M4/88H01M4/96H01M8/16H01M16/00
CPCY02B90/10Y02E60/50
Inventor 郑宾国李庆召梁丽珍万芳曾波李玉鹏李鹏飞党远
Owner SHENGSHI LANDSCAPE GRP CO LTD
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