Bubble flotation column system for separating micro-plastics in sediments and using method of bubble flotation column system

Abstract

The invention discloses a bubble flotation column system for separating micro-plastics in sediments and a using method of the bubble flotation column system. The bubble flotation column system comprises a feeding pump, a size mixing tank and a flotation column body, wherein a peristaltic metering pump I is arranged on one side of the top end of the size mixing tank; the feeding pump is arranged at an outlet of the size mixing tank; a connector I is fixedly connected to the top of one side of the flotation column body; an outlet of the feeding pump is fixedly connected with the connector I of the flotation column body; a connector II is fixedly connected to the middle of the other side of the flotation column body; an air entraining jet flow bubble generator is fixedly connected to one side of the connector II; a connector III is fixedly connected to the bottom of the other side of the flotation column body; a circulating pump is fixedly connected to one side of the connector III; and an outlet of the circulating pump is fixedly connected with an inlet of the air-entraining jet bubble generator. The system has universality for separating hydrophobic microplastics in sediments, only needs to add a small amount of environment-friendly foaming agent and collecting agent during working, is low in cost, can continuously treat large-batch sludge, and is suitable for industrial application.

Description

technical field [0001] The invention relates to the technical field of microplastic treatment in the environment, in particular to a bubble flotation column system for separating microplastics in sediments and a method for using the same. Background technique [0002] Plastic fibers, particles or films with a diameter of less than 5 mm are usually defined as microplastic particles. The ubiquitous microplastics have brought great harm to human life, and plastic pollution has become the second largest scientific problem in the field of environmental and ecological sciences. [0003] Sediments such as soil, sludge, beaches, and wetlands contain a large amount of microplastics. Separating microplastics in sediments is conducive to promoting the sustainable development of ecological balance. The combination of soil and microplastics in sediments increases the solid phase Due to the difficulty of separation, the current microplastic treatment technologies include physical separati...

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Problems solved by technology

[0003] Sediments such as soil, sludge, beaches, and wetlands contain a large amount of microplastics. Separating microplastics in sediments is conducive to promoting the sustainable development of ecological balance. The combination of soil and microplastics in sediments increases the solid phase Due to the difficulty of separation, the current microplastic treatment technologies include physical separation and biodegradation, and physical separation requires the use of a large amount of high-density solution, resulting in high separation costs for microplastics, while biodegradation has a slow degradation rate and is easy to produce secondary pollution

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