Waterless toilet system

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Solution Overview

Problem

Existing composting toilets require significant user maintenance and have limited accessibility and ease-of-use, leading to unpleasant removal of finished end-products if not properly installed or maintained.

Innovation Solution

A waterless toilet system with a main body comprising a toilet bowl, tank, waste bin system, and compost mixing wheel, featuring compartments for compost and hygienic products, a deployable urinal system, and a compost mixing mechanism activated by a pedal, along with a movable toilet seat and cover system to enhance usability and accessibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If composting toilet systems are used to eliminate water usage and enable waste recycling, then environmental sustainability and water conservation are improved, but user maintenance responsibility and operational complexity increase

Engineering Contradiction:
Improveenvironmental sustainabilityVSAvoiduser maintenance responsibility
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The toilet system is divided into distinct functional compartments: a first compartment for solid waste composting and a second compartment for liquid waste storage. This segmentation allows each compartment to be maintained independently, reducing the overall maintenance burden on users while preserving the environmental benefits of waterless operation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system incorporates a composting mechanism that automatically mixes and processes solid waste through aerobic decomposition, reducing the need for manual intervention. The self-composting function maintains waste processing without requiring continuous user attention, thereby improving ease of operation while sustaining environmental reliability.

Inventive Principle:
Principle #25Self-service

2Loss of substance

If composting toilets are designed with minimal water usage, then water conservation is improved, but accessibility and ease of maintenance deteriorate

Engineering Contradiction:
Improvewater usageVSAvoidaccessibility
Core Design Contradiction:
Loss of substanceVSEase of operation

Solution Approach 1:

By separating solid and liquid waste into different compartments, the system eliminates the need for water-based flushing mechanisms while improving accessibility. Users can access and empty each compartment independently through user-friendly interfaces, making the waterless design more accessible and easier to maintain.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system uses uniform composting material (such as sawdust or coconut coir) throughout the solid waste compartment to maintain consistent aerobic decomposition conditions. This homogeneity simplifies the composting process and makes maintenance more predictable and accessible to users.

Inventive Principle:
Principle #33Homogeneity

3Loss of substance

If composting toilets operate without water flushing, then water conservation is improved, but waste management complexity and maintenance burden increase

Engineering Contradiction:
Improvewater consumptionVSAvoidwaste management complexity
Core Design Contradiction:
Loss of substanceVSDevice complexity

Solution Approach 1:

The dual-compartment design separates liquid and solid waste management processes, allowing each to be optimized independently. The liquid compartment uses simple gravity-based drainage while the solid compartment employs controlled composting, reducing overall system complexity despite waterless operation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system replaces water-based mechanical flushing with biological composting processes. Aerobic bacteria naturally decompose solid waste through metabolic activity, eliminating the need for complex water delivery mechanisms and reducing waste management complexity while maintaining water conservation benefits.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 system improves maintenance efficiency and accessibility by providing a user-friendly design with a compost mixing mechanism and deployable urinal system, ensuring easy and hygienic waste management.

Implementation Method 1

A composting toilet generally contains and processes excrement, carbon additive and sometimes, food waste. Unlike septic systems, a composting toilet relies on unsaturated conditions where aerobic bacteria break down waste.

Methodology Applied
Scientific EffectAerobic decomposition: Aerobic Digestion

Implementation Method 2

The deployable urinal system may comprise a urinal head connected to a telescoping conduit that is extendable and configured to extend the urinal head beyond the toilet bowl.

Methodology Applied
Scientific EffectTelescoping mechanism:

Implementation Method 3

The urinal system may further include a resilient lever that when engaged is configured to extend telescoping conduit or retract the telescoping conduit.

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 4

the compost mixing system includes at least one mixing wheel disposed within the compost compartment in communication with an external pedal that is configured to cause rotational movement of the compost mixing wheel when depressed.

Methodology Applied
Scientific EffectMechanical force transmission: Mechanical Force

Data Source

PatentUS20250228416A1Waterless toilet system
Publication Date: 2025.07.17 ROYAL POO CO LLC
  • US20250228416A1 patent drawing
  • US20250228416A1 patent drawing
  • US20250228416A1 patent drawing

AI summary

A waterless toilet system that includes a main body that includes a toilet bowl, a tank, a waste bin system, and a compost mixing wheel. The tank of the main body includes at least one internal compartment for storing and dispensing compost material into the waste bin system, and at least one compartment for storing hygienic products. The toilet bowl includes a movable toilet seat and toilet seat cover. Inside of the toilet bowl is a deployable urinal system that extends outwardly. The waste bin system in some exemplary embodiments includes a compost compartment and a separate urinal compartment. Inside of the compost compartment the waterless toilet system includes a mixing wheel in communication with an external pedal that is configured to cause rotational movement of the compost mixing wheel when depressed.