Method and device for utilizing microbial fuel cell-submerged plant to conduct situ-control on phosphorus release of sediment

Abstract

The invention discloses a method and device for utilizing microbial fuel-cell-submerged plant to conduct situ-control on phosphorus release of sediment. The method comprises the steps that A submergedplants are planted in eutrophic water body sediment; B, an anode plate is buried on the lower part of the bottom mud layer-water interface and close to the root system of the submerged plants; C, a cathode plate is arranged at the water-air interface, so that the cathode material is suspended in the water face, and part of the cathode plate is exposed to the air; and D, the anode plate and the cathode plate are connected through a guide line and an external resistor to form current loop. The submerged plants lay the roots in the bottom mud, a hole is formed in the anode plate, so that the anode plate penetrates through the submerged plants and is located on the lower part of the mud-water interface, an overlying water layer is on the mud-water interface, the cathode plate is suspended atthe position of the overlying water layer-air interface, one end of the external guide line is connected with the anode plate, and the other end is connected with the external resistor and the cathodeplate. The method is simple, easy and convenient to operate, the structure is simple, a more stable phosphorus morphology is formed and adsorbed into the sediment, and thus phosphorus release of thesediment is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of lakes, rivers, ditches and other polluted water bodies, and more specifically relates to a bioremediation-electrochemical synergistic in-situ control method for phosphorus release from eutrophic water body sediments, and also relates to a combined microorganism Fuel cells and submerged plants for in situ controlled phosphorus release from sediments. Background technique [0002] Water eutrophication is a major water environment problem that the world is facing at present and for a considerable period of time in the future. As nutrients necessary for the growth of phytoplankton, the accumulation of nitrogen and phosphorus is an important cause of eutrophication in water bodies. With the implementation of exogenous control measures such as sewage interception and drainage, the release of nitrogen and phosphorus in endogenous sediments has become the dominant factor of water eutrop...

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Problems solved by technology

[0007] However, in the early stage of recovery, submerged plants face some stress habitat obstacles such as too deep water level, too strong wind and waves, substrate anaerobic, too high concentration of nitrogen and phosphorus, too hard substrate, too low transparency of water body, competition of planktonic algae, etc., resulting in submerged plants. It is difficult for water plants to colonize and survive. It is necessary to seek other technical methods to improve or create a habitat suitable for submerged plants to restore

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