A method for strengthening the form transformation of endogenous phosphorus in sediment of closed water bodies

Abstract

The invention provides a method for strengthening shape transformation of endogenous phosphorus in substrate sludge of an enclosed type water body. The method comprises the following steps of adding limnodrilus hoffmeistteri to the substrate sludge of the enclosed type water body to be repaired; after the limnodrilus hoffmeistteri gets into the substrate sludge of the water body, performing aeration on overlying water for 1h, enabling the concentration of dissolved oxygen in the overlying water to be maintained to 2-4mg / L, enabling the aeration to be stopped for 5h, then performing aeration by using the operations of performing aeration for 1h and enabling the aeration to be stopped for 5h as a cycle; when the total bioactivity of the substrate sludge of the water body reaches 0.5-0.7 [mu]mol / (h.g) <-1> or above through the aeration, performing aeration on the overlying water for 2h, enabling the concentration of the dissolved oxygen in the overlying water to be maintained to 3-5mg / L, enabling the aeration to be stopped for 10h, and then performing the aeration by using the operations of performing aeration for 2h and enabling the aeration to be stopped for 10h as a cycle; and performing the aeration for 20-30 days so that a process of strengthening the shape transformation of the endogenous phosphorus of the substrate sludge of the enclosed type water body is completed. According to the method disclosed by the invention, a method for effectively controlling the release of the endogenous phosphorus can be provided.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to a method for strengthening the form transformation of endogenous phosphorus in bottom mud of a closed water body. Background technique [0002] Phosphorus is a limiting factor for the growth of phytoplankton, especially for the growth of algae, which require a large amount of phosphorus. With the construction of sewage interception facilities and the implementation of watershed management plans, more and more water bodies have intercepted the input of exogenous phosphorus, such as point sources (domestic sewage or industrial wastewater), non-point sources (farmland runoff and rainfall runoff), River input, etc. Therefore, if the algae in the water body want to grow in large quantities, the source of the large amount of phosphorus they need is the endogenous source, which is mainly the bottom mud. Therefore, the current research focus is how to effecti...

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved: Aiming at the disadvantage that the existing endogenous phosphorus control method cannot accelerate the form transformation of endogenous phosphorus, the present invention provides a method for strengthening the form transformation of endogenous phosphorus in the sediment of a closed water body. The interior gradually forms a regular aerobic-anaerobic alternating state, which can induce the conversion of easy-release phosphorus to difficult-release phosphorus, thus providing a method for effectively controlling the release of endogenous phosphorus