Biohazardous Waste Shredding With In-Process Efficacy Validation
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Solution Overview
Problem
Current methods for treating biohazardous waste lack effective recycling processes and validation methods to ensure the efficacy of waste treatment, leading to inefficient and environmentally harmful disposal methods such as autoclaving and incineration.
Innovation Solution
A waste processing apparatus and method that immerses waste in treatment fluid during shredding, using a blade arrangement to simulate live processing conditions, with a process validation module to assess treatment efficacy using biological indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional autoclaving or incineration is used for biohazardous waste treatment, then waste disposal is achieved, but environmental harm increases and recycling opportunities are lost
Solution Approach 1:
The patent changes the fundamental treatment parameters from high-temperature thermal processes (autoclaving/incineration) to low-temperature chemical treatment using peracetic acid and hydrogen peroxide. This parameter change maintains treatment efficacy while eliminating the environmental harms associated with combustion and high-energy consumption, enabling subsequent recycling of treated waste materials.
Solution Approach 2:
The patent converts the harmful biohazardous waste into a beneficial recyclable material through chemical treatment. By using peracetic acid and hydrogen peroxide to disinfect and decompose organic matter, the waste is transformed from a harmful substance requiring landfill disposal into a cleaned material that can be reused, thus turning the disposal problem into a resource recovery opportunity.
2Ease of operation
If validation testing is performed using separate test samples, then testing simplicity is maintained, but measurement precision of treatment efficacy deteriorates
Solution Approach 1:
The patent makes the waste sample serve multiple functions simultaneously: it is both the object being treated and the validation test sample. By placing biological indicators directly within the waste material that undergoes treatment, the same sample validates the treatment efficacy, eliminating the need for separate test samples while maintaining measurement accuracy through direct exposure to the actual treatment conditions.
Solution Approach 2:
The patent merges the validation testing function with the waste treatment process itself. Instead of conducting separate validation tests on duplicate samples, the treatment and validation are combined into a single integrated process where biological indicators embedded in the waste material serve as both treatment targets and efficacy validators, simplifying operations while improving measurement precision.
3Productivity
If waste is processed without immersion in treatment fluid, then processing speed is maintained, but treatment efficacy deteriorates
Solution Approach 1:
The patent extracts the treatment fluid (peracetic acid and hydrogen peroxide solution) as a separate, dedicated medium that completely immerses the waste material during processing. This extraction of the treatment fluid from the waste stream allows for continuous immersion treatment while maintaining processing speed, ensuring that all waste surfaces are exposed to the disinfecting chemicals for adequate contact time without requiring batch processing or停顿.
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
Provides accurate validation of waste treatment efficacy by exposing biological indicators to treatment fluids, reducing processing time and environmental impact while ensuring effective disinfection and shredding of biohazardous waste.
Implementation Method 1
treatment of waste from various sources requires different levels of treatment in order for it to be further processed in any one of various known recycling processes
Implementation Method 2
Recycling processes may require relatively small particles of waste materials in order to process them effectively
Data Source
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AI summary
A validation method is disclosed, comprising the following steps: shredding waste using a blade arrangement in a waste processing vessel in which the waste is shredded and exposed to a waste treatment fluid during a waste processing cycle time; and exposing a process validation sample comprising a process efficacy indicator to the waste treatment fluid, to which the waste is exposed, during the waste processing cycle time; and analysing the effect of the waste treatment fluid on the process efficacy indicator to determine an efficacy of the waste processing and liquid treatment process. An apparatus suitable for performing the method is also disclosed.