Double-layer sediment remediation capsule and application thereof

Abstract

The invention discloses a double-layer sediment remediation capsule and application thereof. The double-layer sediment remediation capsule is divided into an outer bacterial liquid coating layer and an inner adsorption material layer, the outer bacterial liquid coating layer provides nutrient substances for microorganism growth on one hand and protects microorganisms from being affected by the external environment on the other hand, the environment adaptation capacity of the microorganisms is improved; nutrients can be provided for the growth of microorganisms by degrading sediment pollutants;the double-layer sediment remediation capsule is different from a traditional sediment remediation powdery agent, is not influenced by water flow, cannot be lost along with the water flow, has a slowrelease effect, prolongs the action time, and acts on black and odorous bottom mud for a long time.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a double-layer bottom mud restoration capsule and its application. Background technique [0002] The prevention and control of urban black and odorous water pollution is a water environment problem that every country pays close attention to and people's livelihood reflects strongly. DO (dissolved oxygen, dissolved oxygen) in the water body reduces or even completely eliminates the concentration of DO (dissolved oxygen) in the water body, resulting in black and odorous water; in addition, the high content of N and P substances in the water body will also cause the water body to turn black and hairy Smelly. The effectiveness of sediment treatment is the key to the battle against black and odorous water bodies in urban water treatment projects. [0003] At present, the commonly used black and odorous sediment restoration methods mainly include sediment dredging, artificia...

AI Technical Summary

Problems solved by technology

Although sediment dredging and artificial aeration can achieve certain results in a short period of time, the engineering volume is huge, the investment demand is high, and the long-term control of pollutants and the recovery of benthic biological communities are not effective.

Compared with sediment dredging and artificial aeration, the bio-ecological method is a scientific, environmentally friendly, green and effective restoration method. However, due to the influence and limitation of various factors on the growth of microorganisms, the nitrogen and phosphorus content in urban sewage continues to increase. These high Concentration nitrogen, phosphorus pollutants, and heavy metal toxic substances will inhibit the life activities of traditional microorganisms, resulting in a decrease in the rate of microbial degradation of pollutants, and even a large number of microbial deaths

In addition, the microorganisms used to restore black and odorous bottom mud are mainly liquid bacterial agents. Due to the lack of a fixed substrate for microorganisms when added to the water, the added microorganisms are easily lost with the flow of water, which greatly affects the repair effect. The repair effect requires continuous supplementation of bacteria

At present, the important reason why biological ecological methods are not yet popular is that microorganisms suitable for the treatment of various black and odorous water bodies and microbial agents that can continue to act on fixed substrates have not yet been developed.

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