Method for improving black and odorous water body through coverage of modified zeolite for environmental dredging

Abstract

The invention discloses a method for improving a black and odorous water body through coverage of modified zeolite for environmental dredging. The method comprises the steps of combing environmental dredging technology and modified zeolite coverage technology to restore contaminated sediment, improving the quality of the water body through simulation tests aiming at the contaminated sediment of the black and odorous water body and the environmental dredging technology and modified zeolite coverage technology, and obtaining optimum operation parameters. The method has the beneficial effects that a technical support is provided for thoroughly improving the water quality of contaminated rivers, and a theoretical direction is further provided for water body restoration engineering applicationof the contaminated rivers; the existence significance of microorganism during the water body restoration is discussed through investigation of the variation of the microorganism in the improvement ofthe quality of the water body, so as to analyze and judge the stability and restorability of the water body after restoration of the water body, and a scientific basis can be provided for the selection of schemes of water body restoration technology; the risk caused by artificial perturbation to the water body due to the restoration schemes is analyzed by taking sediment microorganism species andactivity as evaluation indexes, and a scientific basis is provided for the final implementation of the schemes of the water body restoration technology.

Description

technical field [0001] The invention belongs to the technical field of water environment treatment and protection engineering, and in particular relates to a method for covering and improving black and odorous water bodies with modified zeolite for environmental protection dredging. Background technique [0002] Urban water body can directly reflect the environmental status and economic and cultural level of a region, but in recent years, the phenomenon of black and odorous water body has become more and more serious, which has greatly affected the urban landscape and the daily life of residents. Statistics show that more than 90% of urban rivers in my country are polluted to varying degrees. As an important part of the water body, the sediment of the river channel participates in the entire cycle of the river ecosystem. The exchange of toxic and harmful substances with the overlying water makes the sediment a "sink" and "source" of pollutants in the water body. As a result...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for environmental dredging to cover and improve black and odorous water bodies with modified zeolite, so as to solve the problem that most of the current polluted water bodies repaired in the above-mentioned background technology adopt combined ecological restoration technology. In engineering practice, the restoration of polluted river water bodies The stability and self-recovery ability for a long period of time have yet to be investigated; the implementation of the engineering restoration plan for urban polluted rivers will inevitably affect the natural ecological balance of the water body, especially the dredging of the bottom sediment. Fundamentally solve the problem of internal source pollution of rivers. If the amount of dredging is too large, although it can remove internal source pollution and increase the water flow capacity of the river to a certain extent, the project investment will also increase, and it will greatly reduce the biological population in the water body and destroy The ecological balance of the water body, the resulting artificial disturbance will cause the river to lose its self-recovery ability for a long time, and the stability will deteriorate

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