Multi-stage Graphene Medical Sewage Sterilization
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Solution Overview
Problem
Existing medical sewage sterilization technologies face challenges with incomplete sterilization, leading to the presence of pathogenic bacteria, viruses, and parasites in discharged sewage, posing risks to public health and environmental safety.
Innovation Solution
A multi-stage medical sewage sterilization device utilizing graphene nano technologies, comprising sequential graphene nano composite grids, graphene photocatalytic sterilization, graphene-modified diatom ceramic disinfection, ultrasonic, and laser near-infrared sterilization methods, ensuring thorough elimination of pathogens and compliance with national standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sterilization methods (ultraviolet, hydrogen peroxide, ozone) are used, then the sterilization process is simple to implement, but the sterilization completeness is insufficient and pathogenic microorganisms remain in discharged sewage
Solution Approach 1:
The sterilization process is divided into multiple sequential stages: first-stage graphene nano composite grid, second-stage graphene nano composite grid, third-stage graphene nano composite grid, graphene photocatalytic sterilization tank, graphene-modified diatom ceramic disinfection tank, ultrasonic sterilization tank, and laser sterilization device. Each stage targets different types of pathogens with progressively finer filtration and sterilization mechanisms, ensuring complete elimination of all pathogenic microorganisms while maintaining manageable system complexity through modular design
Solution Approach 2:
The patent employs multiple composite materials with synergistic sterilization mechanisms: graphene nano composite grids combine physical filtration with antimicrobial properties, graphene photocatalytic sterilization uses graphene-enhanced photocatalysis, graphene-modified diatom ceramic combines adsorption with sterilization, and laser sterilization uses photothermal effects. These composite materials work together to achieve comprehensive sterilization that traditional single-method approaches cannot accomplish
2Reliability
If multi-stage sterilization with increasing mesh numbers is used, then the sterilization effectiveness is improved, but the device complexity and maintenance difficulty increase
Solution Approach 1:
The multi-stage sterilization system is designed as modular segmented units that can be independently accessed and cleaned. Each graphene nano composite grid stage, photocatalytic tank, ceramic disinfection tank, ultrasonic tank, and laser device are separate modules with defined access points, allowing maintenance personnel to clean or replace individual components without disassembling the entire system, thus maintaining ease of repair despite multiple stages
Solution Approach 2:
The system incorporates self-cleaning and self-maintenance features: ultrasonic sterilization tank provides continuous cavitation cleaning, laser sterilization device uses high-energy beams to sterilize surfaces, and the graphene-based materials possess inherent antimicrobial properties that prevent biofilm formation. These self-service mechanisms reduce the frequency and complexity of manual maintenance while preserving sterilization effectiveness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves complete sterilization of medical sewage, meeting national standards with no detectable pathogenic bacteria or parasites, and offers a cost-effective, long-lasting solution with adjustable and easily cleanable components.
Implementation Method 1
graphene photocatalytic sterilization
Implementation Method 2
ultrasonic sterilization
Implementation Method 3
laser near-infrared sterilization
Implementation Method 4
laser sterilization
Implementation Method 5
graphene-modified diatom ceramic disinfection
Data Source
AI summary
The invention relates to a multi-stage medical sewage sterilization device and method based on graphene nano technologies. The multi-stage sterilization device comprises multiple stages of graphene nano composite sterilization grids, a graphene photocatalytic sterilization tank, a graphene-modified diatom ceramic disinfection tank, an ultrasonic sterilization tank and a laser and near-infrared sterilization device. Compared with a traditional method, the present invention has a more thorough killing or blocking effects on pathogenic bacteria, parasite eggs and the like in various medical sewages. In addition, the device of the present invention can be disassembled and cleaned regularly, and has a long service life, thus the process cost is reduced.