Method for inhibiting release of endogenous nitrogen and phosphorus in bottom mud

Abstract

The invention discloses a method for inhibiting release of endogenous nitrogen and phosphorus in bottom mud, and belongs to the technical field of bottom mud treatment. The method comprises the following steps: adding oxygen nanobubble modified mineral particles into to-be-treated bottom mud as an improved matrix, and providing micro-nano-scale oxygen-containing bubbles to overlying water; then, a microbial preparation is added one week after the improved substrate is put, nitrogen and phosphorus in the bottom mud are degraded and converted, and release of endogenous nitrogen and phosphorus is inhibited; finally, submerged plant myriophyllum spicatum is planted on the improved substrate, endogenous nitrogen and phosphorus are absorbed and converted, and accumulation of the endogenous nitrogen and phosphorus is reduced. According to the treatment method, the microbial preparation, the oxygen nanobubble modified mineral particles and the planted submerged plant myriophyllum verticillatum are combined, and the oxygen nanobubble modified mineral particles provide a carrier and a place for growth of microorganisms and the myriophyllum verticillatum; phosphorus-accumulating bacteria and nitrification-denitrification bacteria provided by the microbial preparation further inhibit release of nitrogen and phosphorus, and meanwhile, the myriophyllum spicatum can relieve interference of water disturbance on oxygen nanobubbles.

Description

technical field [0001] The invention belongs to the technical field of bottom mud treatment, and more specifically relates to a method for inhibiting the release of endogenous nitrogen and phosphorus from bottom mud. Background technique [0002] In recent years, nutrients such as nitrogen and phosphorus in most lakes in my country have seriously exceeded the standard, which has affected social and economic development. Although my country has increased the control over the input of nutrients from external sources, so as to repair damaged water bodies and restore ecology. However, the endogenous release of nitrogen and phosphorus is often ignored because it is difficult to suppress, which makes water treatment often fail to meet expectations. As the storage part of nitrogen and phosphorus in water bodies, sediment is often affected by factors such as temperature, dissolved oxygen, and redox potential. , release nitrogen and phosphorus to the water body, and external disturb...

AI Technical Summary

Problems solved by technology

[0004] Compared with chemical methods, which are easy to cause greater impact on water bodies, bioremediation technology has the characteristics of low cost, small environmental impact, good treatment and restoration effect, and simple operation. The main methods include adding microbial agents and planting submerged plants. Most of the microbial agents on the market are Bacillus subtilis mainly inhibits the release of phosphorus, but the effect on nitrogen release is not enough. It is necessary to study microbial preparations that can also affect the release of nitrogen and phosphorus. Although planting submerged plants can reduce endogenous nitrogen and phosphorus, the effect is slow and can only be used as Follow-up protection measures