1. Wetlands refer to natural or artificial, permanent or temporary marshlands, wetlands, peatlands or water zones, with water bodies that are either stationary or flowing, or are fresh water, brackish water or salt water. The so-called artificial wetland refers to the wetland system formed by human influence and construction. Regardless of whether it is artificial or natural, wetlands have very strong ecological functions and have the same characteristics. The surface is covered with water or filled with water all the year round. , Floating and submerged plants. These plants can absorb metals and some harmful substances in their tissues, and many plants can also participate in the detoxification process, absorb, metabolize, and decompose pollutants to achieve water purification. Therefore, wetlands are often referred to as "natural sewage treatment plants" and this "natural sewage treatment plant" requires almost no additional fossil fuels and chemicals.
2. Artificial wetlands are artificially constructed and controlled grounds similar to marshlands. Sewage and sludge are dosed to artificially constructed wetlands. Sewage and sludge flow in a certain direction. A technology that mainly uses the physical, chemical, and biological triple synergy of soil, artificial media, plants, and microorganisms to treat sewage and sludge. Its mechanism of action includes adsorption, retention, filtration, redox, precipitation, microbial decomposition, transformation, plant shelter, residue accumulation, transpiration of water and nutrient absorption, and the role of various animals. It is a comprehensive ecosystem. It applies the principle of species symbiosis, material recycling and regeneration, and coordination of structure and function in the ecosystem. On the premise of promoting the benign circulation of pollutants in wastewater, it fully utilizes the production potential of resources and prevents environmental recurrence Pollution, to obtain the best benefits of sewage treatment and recycling.
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