A method for in-situ ecological restoration of black and odorous river courses

Abstract

The invention discloses a method for in-situ ecological remediation of black and odorous riverways. The method comprises the following steps: (1) rushing over sludge at a target river bottom by using a high-pressure water gun so as to suspend riverway sludge in a water body; (2) in the process of the step (1), putting microbial preparations into the target water body, establishing an ecological water body system, degrading pollutants, and performing sludge reduction and water purification; (3) performing nano aeration to increase the dissolved oxygen content in the water body, and performing oxidation reduction on the organic pollutants; (4) one to two days after the step (3), laying plant floating islands in a target water area, wherein plants on the plant floating islands can absorb nutrient substances converted by microorganisms and can interact with photosynthetic functions of the microorganisms, then water bottom ecology can be established and maintained, and water can be purified. The method is low in investment cost, simple to operate, convenient to maintain, stable in treatment effect, reliable and long-lasting in maintenance of ecological systems of treated water areas, free of resident disturbance, free of farmland occupation around, and free of pollution risk.

Description

technical field [0001] The invention relates to the technical field of river pollution control, in particular to a method for in-situ ecological restoration of black and odorous rivers. Background technique [0002] The river sediment is an important part of the river ecosystem. The self-purification of the river is mainly due to its dilution, adsorption, microbial degradation and other functions. Among them, sediment adsorption and microbial degradation are the main forms of conversion and reduction of river pollutants, and sediment plays an irreplaceable role in river self-purification. [0003] A large amount of point source pollution such as industrial wastewater and domestic sewage is discharged into; surface runoff, agricultural runoff, atmospheric dry deposition and wet discharge and other non-point source pollution are imported in large quantities; long-term excessive pollution of rainwater and other pollutants lead to river sludge silting, water bodies Ecology caus...

AI Technical Summary

Problems solved by technology

III. The dredging and dredging work with small urban river sections is inconvenient for dredging boats to carry out water operations

IV. The amount of dredged sediment is large, the composition of pollutants is complex, and the water content is high, so it is difficult to deal with

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