System and method for improving black and odorous riverway water quality through micro-aeration and submerged plants

Abstract

The invention provides a system and method for improving black and odorous riverway water quality through micro-aeration and submerged plants. Black and odorous riverway contaminated bottom silt is improved through bottom layer micro-aeration, release of contaminants of the bottom silt is controlled, growth of the submerged plants is assisted, and ammonia nitrogen is reduced. Meanwhile, according to the seasonal change of the plants, evergreen submerged vegetation is established through an elodea nuttallii-eel grass combination, accompanying species of ceratophyllum demersum, myriophyllum spicatum and hydrilla varticillata are planted in an assisted mode, the stable submerged vegetation is established, and the purpose of improving the riverway water quality is achieved. The problem that the transparency is low in the initial stage of a black and odorous riverway water quality improvement project is solved through a floating bed capable of ascending and descending through introduction of the submerged plants. The probability of establishment of the specific submerged vegetation in a black and odorous riverway is verified, water quality improvement is remarkable, operation is easy, the project amount is small, and the system and method are economical and practical.

Description

technical field [0001] The invention belongs to the field of water environment treatment and ecological restoration, and specifically relates to river pollution treatment, ecological restoration and water body landscape construction technology. Background technique [0002] Due to the long-term input of pollutants in urban rivers, the pollution load of rivers increases, which is not enough to complete the transfer and degradation of pollutants, the self-purification ability of water bodies decreases, and the habitat of rivers is destroyed, leading to the degradation of river ecosystems. At the same time, due to the long-term retention of urban rivers, a large amount of nutrients and heavy metals are seriously accumulated and deposited in the sediment, forming a vicious circle, and the polluted sediment has also become an endogenous source of pollution. In addition, the hardening of urban river slopes has cut off the natural ecological chain of the river, making the function ...

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Problems solved by technology

[0007] The problem to be solved by the present invention is to screen submerged plants suitable for the growth of black and odorous water bodies; the transparency of black and odorous rivers is low, and it is difficult to plant submerged plants in the initial stage; most plants grow vigorously in summer, and the water purification ability in winter is weakened, so an evergreen type can be established. submerged vegetation

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