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Method and device for repairing black and smelly water body in situ by utilizing microbial fuel cell and aquatic plants

A technology for aquatic plants and black and odorous water bodies, applied in biological treatment devices, biological water/sewage treatment, biological sludge treatment, etc., can solve problems such as hard bottom, low water transparency, high nitrogen and phosphorus concentration, and achieve recovery , promote growth and reproduction, promote the effect of growth

Pending Publication Date: 2018-10-26
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some unsuitable habitats such as too deep water level, too strong wind and waves, anaerobic substrate or too hard substrate, too high concentration of nitrogen and phosphorus, and too low water transparency often become obstacles to the initial recovery of submerged plants in practice.

Method used

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  • Method and device for repairing black and smelly water body in situ by utilizing microbial fuel cell and aquatic plants
  • Method and device for repairing black and smelly water body in situ by utilizing microbial fuel cell and aquatic plants
  • Method and device for repairing black and smelly water body in situ by utilizing microbial fuel cell and aquatic plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of method utilizing microbial fuel cell-aquatic plant in situ repairing black and odorous water body, its steps are as follows:

[0052] A. Buried the anode plate at 3 or 5 or 8 or 10 cm below the sediment-water interface of the black and odorous water body; this setting is because the black and odorous substances in the sediment generally gather in the middle and upper layers, and the oxidation-reduction potential of this part is relatively low. Low, the anode plate is set in this depth range, which is conducive to the improvement of redox conditions in this area. At the same time, this depth range is also the depth range of the root zone of aquatic plants, which is conducive to the synergy with the power generation and plant root zone.

[0053] B. Put the root system of aquatic plants through the round hole on the anode plate and take root in the bottom mud, and use the synergistic effect of the plant root system and the anode electrogenic flora to promote the s...

Embodiment 2

[0064] A device for in-situ restoration of black and odorous water bodies using microbial fuel cells and aquatic plants. Wire 6, external resistance 7. It is characterized in that: the anode plate 2 is located under the surface layer of the bottom mud layer 1, the depth is 3 or 5 or 8 or 10 cm, the root system of the aquatic plant 3 passes through the opening 8 of the anode plate 2 and penetrates into the bottom mud layer 1, and the cathode The plate 5 is suspended in the upper water layer 4 and partially exposed (30%-70% of the area can be within this range) in the air, one end of the outer wire 6 is connected to the anode plate 2, and the other end of the outer wire 6 is connected to the external resistance 7 , The external resistor 7 is connected to the external wire 6 and the cathode plate 5 respectively to form a current path. Gradually enrich a large number of electrogenic bacteria and iron redox bacteria near the anode, which can promote the redox cycle process of iron...

Embodiment 3

[0077] The experiment compared the restoration effect of the MFC-Littleweed system and the single planting of Lilygrass system on black and odorous water bodies under the same environmental conditions, and the results showed that: the biomass of the coupled MFC system increased by 30-50%; there was an iron handle in the anode Iron bacteria such as Gallionella (abundance 0.2%), and iron-reducing bacteria such as Geobacter (abundance 10.4%) and Bacillus (abundance 4.4%) can promote iron production. The oxidation-reduction cycle process is conducive to the degradation of macromolecular organic matter in black and odorous sediment into small molecular organic acids, and the complete oxidation of small molecular organic acids without consuming more dissolved oxygen in the water body.

[0078] Its implementation steps, structure are identical with embodiment 1 and embodiment 2.

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Abstract

The invention discloses a method and a device for repairing a black and smelly water body in situ by utilizing a microbial fuel cell and aquatic plants. The method comprises the following steps: A, embedding a positive plate under a black and smelly water body-water interface; B, enabling root systems of the aquatic plants to penetrate through round holes formed in the positive plate; C, setting negative plates on a water-air interface, enabling the positive plates to suspend in water, and exposing the negative plates in the air; D, connecting the positive plate with the negative plates by using outer conductors and an external resistor, thus forming a current loop. The positive plate is located under a mud-water interface, round holes which are in equidistant array arrangement are formedin the negative plates, the root systems of the aquatic plants penetrate through the holes in the positive plate and are rooted in bottom mud, the negative plates are suspended on an overlying water -air interface, and the positive plate and the negative plates are sequentially connected through the external guide lines and the external resistor to form a current path. The method disclosed by theinvention is simple, the operation is convenient, and the structure is simple; absorption of the aquatic plants on nutrient substances is promoted, the black and smelly water body is converted into plant biomass, and blackening and smell as well as eutrophication of a water body are improved.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of lakes, rivers, ditches and other water bodies, and more specifically relates to a method for synergistic treatment and in-situ restoration of black and odorous water bodies using sediment fuel cells and aquatic plants, and also relates to a method for combining aquatic plants and A device for in-situ restoration of black and odorous water by microbial fuel cells. Background technique [0002] Black and odorous water body is an extreme phenomenon of organic pollution of water body, and it is a description of the extreme pollution state of water body. The so-called "black odor", in terms of visual senses, the water body presents an unpleasant color (black or pan-black) and / or emits an unpleasant smell (H 2 S, NH 3 and other irritating gases); From the perspective of formation mechanism, the black and smelly water body is mainly the result of a series of physical, chemical and bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/32C02F3/34C02F11/02
CPCC02F3/005C02F3/32C02F3/34C02F11/02C02F2103/007C02F2203/006C02F2209/04C02F2209/14C02F2303/02C02F2303/10
Inventor 肖恩荣吴振斌武俊梅王培陈迪松张丽萍周巧红徐栋贺锋
Owner INST OF AQUATIC LIFE ACAD SINICA
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