Ecological sinking bed and method for removing nitrogen, phosphorus and heavy metals in riverway sediment

Abstract

The invention discloses an ecological sinking bed and method for removing nitrogen, phosphorus and heavy metals in riverway sediment. The ecological sinking bed comprises a sinking bed body, a planting basket, a substrate, zeolite, a mesh bag and filler. A plant is rooted in the substrate with the top of the plant extending beyond a top grid; the mesh bag is filled with the zeolite and placed around the plant; and the filler is connected in series and bound with the interior of the planting basket and surrounds the plant. The sinking bed is characterized in that the physical adsorption and microbial degradation effects of the surfaces of the substrate and the zeolite and the purifying effect of the aquatic plant are combined, a water body is purified in multiple ways, and the defects thata floating bed is likely damaged and short in tolerance time due to the high speed of rainwater and sun exposure are overcome. The materials of the ecological sinking bed are nontoxic and harmless, and the sinking bed is not easy to damage, and is durable, convenient to recycle for reuse when not in use, free of secondary pollution and easy to popularize and implement since the raw materials are low in cost and wide in source.

Description

technical field [0001] The invention relates to a pollution control method, in particular to an ecological settling bed for removing nitrogen, phosphorus and heavy metals in river bottom mud and a method thereof. The ecological settling bed is used for deep polluted river channel treatment and in-situ restoration. Background technique [0002] At present, the water bodies of most rivers, lakes and reservoirs in my country do not meet the five-category surface water standards, and the treatment of polluted water bodies has become an urgent need for social and economic development and ecological environment construction. For river restoration, the traditional river dredging, sediment covering, water diversion, and water replenishment repair methods have problems such as complex engineering, difficult operation, huge cost, and repeated effects. [0003] Ecological floating bed is a commonly used in-situ restoration technology for the treatment of polluted rivers and lakes. It h...

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Problems solved by technology

[0004] Although the existing artificial floating beds are in various forms, they are difficult to resist wind, rain and relatively rapid water flow, and the effect of use is not obvious. In addition, the floating beds use too many plant roots to absorb and absorb pollutants on the surface of the water body, which has a relatively small impact on the pollutants in the middle and bottom of the water body. Small, but most of the pollutants exist in the sediment and mud-water interface

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