What is the construction mode of constructed wetland?

① substrates with various water permeability.

② Plants suitable for growing in saturated water and anaerobic substrates.

③ water body (water flowing below or above the substrate surface).

④ aerobic, facultative or anaerobic microorganisms.

⑤, invertebrates or vertebrates.

wetland system is a packed bed composed of soil and fillers (such as gravel) in this kind of depression with a certain length-width ratio and bottom slope. The wastewater flows in the gap of the bed filler or on the bed surface, and aquatic plants (such as reed and cattail) with good performance, high survival rate, strong water resistance, long life cycle, beautiful appearance and economic value are planted on the bed surface, forming a unique animal and plant ecosystem to treat the wastewater, so that the treated water source can be used for production and life, and aquatic economic plants can be used for reproduction to improve people's living standards.

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