Integrated microbial desalination battery-artificial wetland device

Abstract

The invention provides an integrated microbial desalination battery-artificial wetland device. A microbial desalination battery electrode material is arranged in the junction of an upper-layer substrate material and a lower-layer substrate material, and an ion exchange membrane is arranged between every two adjacent electrodes. Salt-resistant emergent aquatic plants are planted on an upper-layer artificial wet substrate, and the roots of the emergent aquatic plants are planted close to an electrode of the topmost artificial wet substrate. Organic matter in salt-containing wastewater is decomposed to release electrons under the action of microorganisms under a lower-layer substrate anode anaerobic environment, and the electrons are transmitted to a cathode through an external circuit to generate a current; due to the fact that potential difference exists between the anode and the cathode, salt ions can spontaneously paste through the ion exchange membranes to move to the cathode / anode,and desalination is realized. Organic pollutants such as nitrogen, phosphorus and the like in the wastewater move along with a water flow to be removed under the synergistic effect of the wet substrates, the aquatic plants and the microorganisms. The device provided by the invention can be used to effectively purify salt-containing microalgae-containing water bodies with different eutrophication degrees, and is a low-cost low-energy-consumption recyclable environment-friendly technology.

Description

technical field [0001] The invention relates to water body purification, in particular to an integrated microbial desalination battery-artificial wetland device for eutrophic coastal seawater. Background technique [0002] With the development of economy, the shortage of water resources and the pollution of water environment have become hot spots. Due to the direct discharge of domestic sewage from land and islands and the development of aquaculture in the coastal waters, nutrients such as nitrogen and phosphorus flow into the coastal areas of the sea-land transition zone, which has a huge impact on coastal wetlands, mangroves, and coral reefs. The intensification of eutrophication in water bodies also poses a serious threat to the nearshore water environment. [0003] Eutrophication of water body destroys water ecological balance and poses a huge threat to human health (for example, nitrous acid and its compounds are carcinogenic, teratogenic, and mutagenic). The most dir...

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Problems solved by technology

CW is easily affected by the natural environment (temperature, light, etc.), influent water quality (whether pretreatment, pollutant concentration), plant species (plant salt tolerance, root absorption and oxygen delivery, etc.) and hydrodynamic conditions, and CW decontamination microorganisms Poor salt tolerance makes it difficult to improve the effect of treating eutrophic water near the coast

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