Organic Substrate Disintegration via Low-Temperature Steam and pH Adjustment
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Solution Overview
Problem
Current methods for thermal disintegration of organic sludges in wastewater treatment are complex, energy-intensive, and result in high inert COD loads, requiring intense maintenance and complex recooling processes, while also being inefficient in processing highly viscous substrates.
Innovation Solution
A method involving steam treatment of organic substrates at temperatures below 100°C, combined with a pH-changing solution, to disrupt microorganisms without the need for pressurized systems or heat exchangers, allowing for efficient disintegration of highly viscous sludges and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature thermal processes (above 100°C) are used for disintegration, then microorganisms are effectively broken down, but system complexity and maintenance requirements increase due to pressurized systems and heat exchangers
Solution Approach 1:
The patent changes the temperature parameter from above 100°C to below 100°C, and changes the pressure parameter from pressurized to atmospheric conditions. This allows effective disintegration to be achieved without requiring complex pressurized systems or heat exchangers, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The patent replaces the mechanical/thermal system (pressurized vessels, heat exchangers) with a chemical system (steam treatment combined with pH-changing solution). This substitution eliminates the need for complex mechanical pressure containment systems while achieving the same disintegration effect
2Reliability
If high temperatures (130°C to 180°C) are applied for disintegration, then organic material is broken down, but energy consumption increases and recooling processes become necessary
Solution Approach 1:
The patent changes the temperature parameter from high temperatures (130-180°C) to below 100°C. This parameter change reduces energy consumption for heating and eliminates the need for complex recooling processes, while still achieving effective disintegration when combined with pH-changing solutions
Solution Approach 2:
The patent converts the typically harmful effect of high temperature (energy waste and need for recooling) into a benefit by using lower temperatures combined with chemical agents. The pH-changing solution enhances the disintegration effect at lower temperatures, turning what would be a weakness into a strength
3Ease of manufacture
If thermal-chemical disintegration is performed without pH adjustment, then processing is simpler, but disintegration effectiveness is reduced
Solution Approach 1:
The patent combines steam (thermal agent) with pH-changing solutions (chemical agent) to create a composite treatment system. This combination produces a synergistic effect where the thermal and chemical actions work together to enhance disintegration effectiveness beyond what either method could achieve alone, while keeping the process relatively simple
4Device complexity
If steam treatment below 100°C is used, then energy consumption is reduced and system complexity decreases, but disintegration effectiveness may be insufficient without additional chemical agents
Solution Approach 1:
The patent combines steam (thermal agent) with pH-changing solutions (chemical agent) to create a composite treatment system. This combination produces a synergistic effect where the thermal and chemical actions work together to enhance disintegration effectiveness beyond what either method could achieve alone
Solution Approach 2:
The patent changes the pH parameter by introducing pH-changing solutions, which works synergistically with the thermal parameter (steam treatment below 100°C). This dual parameter change enables effective disintegration under simplified atmospheric conditions without requiring high temperatures or pressures
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
This approach simplifies the disintegration process, reduces energy requirements, minimizes inert COD generation, and enables the processing of highly viscous substrates, improving subsequent digestion processes while maintaining sanitation standards.
Implementation Method 1
the substrate is treated with steam to heat it to a temperature below 100°C or is brought to such a temperature by means of the steam
Implementation Method 2
a thermal disintegration processes are known, in which the microorganisms present in the sewage sludge in particular are to be broken down
Implementation Method 3
thermal-chemical disintegration processes
Data Source
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AI summary
In a process for the disintegration of organic substrates, an alkaline solution (3) is added to the substrate (1) as a pH-modifying solution, and the substrate is then treated with steam (4; 14) or steam is added to it to heat it to a temperature below 100°C. Under pressureless conditions, the heated substrate containing the alkaline solution is subjected to a residence time. Preferably, the organic substrates are sludges from wastewater treatment plants.