Household Solid Feces Treatment with Staged Dehydration and Combustion
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Solution Overview
Problem
There is a need for a small-sized feces treatment apparatus that can process feces directly in households with minimal energy consumption and reduced harmful gas emission, especially in regions lacking large-scale excreta treatment facilities.
Innovation Solution
A solid feces treatment apparatus featuring a dehydrator with alternating fixed and moving discs, a dryer with multiple chambers and screws, and a combustor to process feces efficiently, reducing energy use and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a household feces treatment apparatus is installed in a bathroom, then feces can be processed directly in each household, but the apparatus must be small-sized which limits processing capacity
Solution Approach 1:
The treatment apparatus is divided into multiple functional modules: a dehydration module with screw press, a drying module with drying chamber, and a combustion module. This segmentation allows each module to be compact while maintaining overall functionality, enabling the apparatus to be small-sized yet capable of complete feces treatment in household settings.
2Reliability
If feces are processed using conventional drying and incineration methods, then complete treatment is achieved, but energy consumption is high
Solution Approach 1:
The apparatus performs preliminary dehydration using a screw press to remove liquid components from feces before the drying and combustion stages. This preliminary action reduces the moisture content significantly, so that subsequent drying requires much less energy and combustion is more efficient, thereby reducing overall energy consumption while maintaining complete treatment.
Solution Approach 2:
The system changes the physical parameters of feces progressively: first reducing moisture content through mechanical dehydration, then further reducing water content through thermal drying at controlled temperatures, and finally achieving complete treatment through combustion. This staged parameter change optimizes energy efficiency at each stage.
3Productivity
If dehydration is performed using conventional methods, then liquid separation is achieved, but the dehydration efficiency is insufficient for small-scale applications
Solution Approach 1:
The apparatus replaces conventional filtration or centrifugal dehydration methods with a screw press mechanical system. The screw press applies direct mechanical pressure to squeeze liquid from feces, achieving high dehydration efficiency in a compact configuration suitable for household bathrooms, thereby improving productivity without increasing apparatus size.
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 apparatus effectively dehydrates, dries, and incinerates feces with reduced energy consumption and minimal harmful gas emissions, suitable for household use.
Implementation Method 1
a dehydrator extracting a liquid component from first solid feces to produce second solid feces
Implementation Method 2
a dryer evaporating a liquid component of the second solid feces to produce third solid feces
Implementation Method 3
a combustor burning the third solid feces
Data Source
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AI summary
A solid feces treater includes a dehydrator extracting a liquid component from first solid feces to produce second solid feces, a dryer evaporating a liquid component of the second solid feces to produce third solid feces, and a combustor burning the third solid feces, wherein the second solid feces have a solid content of about 25 % to about 30 %, and the third solid feces have a solid content greater than or equal to about 90 % and less than about 100 %.