Dry Sanitation System
The dry sanitation system separates solids, urine, and washing water through a specialized seat with three distinct ports. An inclined sieve separator beneath the seat allows liquids to drain while directing solids to a composting pit for aerobic decomposition. The system includes separate chambers for waste water, solids composting, and urine collection with nitrogen preservation mechanisms. This enables independent treatment of each waste component without water mixing, facilitating nutrient recovery and reducing environmental impact.
Conventional water-based sanitation systems require heavy water usage for flushing and create blackwater by mixing fecal matter, urine, and washing water. This causes nutrient waste, water pollution, and poses challenges in water-scarce areas. The system fails to utilize valuable nutrients in human excreta that could serve as organic fertilizers, instead creating environmental pollution through sewage discharge.
Salient Features:
- Three-port seat design for separating urine, solids, and washing water
- Inclined sieve separator for liquid-solid separation
- Self-closing hinged flap cover for odor and pest control
- Separate compartments for waste water, solids, and urine collection
- Layered gravel filter bed for washing water treatment
- Urine air shield layer using polystyrene foam balls
- Ridge-based bowl design preventing liquid stagnation
Heel supports for comfortable squatting position
Advantages/Novelty:
- Enables aerobic decomposition without enzymes or chemicals
- Prevents nitrogen loss in urine through oxidation protection
- Allows direct disposal of sanitary pads and diapers
- Maintains optimal carbon-nitrogen ratio for composting
- Eliminates foul odors and pathogen transmission
- Converts human waste into valuable organic fertilizer
- Reduces water consumption and environmental pollution
- Provides hygienic waste management in water-scarce areas
Seat Portion Assembly:
- Three-Port Design: Front port for urine collection, first rear port for fecal matter with self-closing flap mechanism, and second rear port for washing water
Ridge-Based Bowl: Central elevated section preventing liquid stagnation with heel supports for comfortable squatting
Separator and Chamber System:
- Inclined Sieve: Made of bamboo/aluminum/plastic/steel positioned to separate liquids from solids, directing waste to appropriate chambers
Underground Compartments: Separate pits for solid composting, waste water collection, and urine storage with partition walls maintaining isolation
Treatment Components:
- Urine Management: Insulated pit with bottom-entry conduit and polystyrene foam air shield layer preventing nitrogen oxidation
Composting System: Layered gravel filter bed with organic materials (rice hull, sawdust, wheat straw) maintaining optimal carbon-nitrogen ratio for aerobic decomposition
Mechanical Features:
- Self-Closing Flap: Counter-weighted hinged cover preventing odors and pest entry while allowing waste passage
- Ventilation System: Vent pipes ensuring proper air circulation for decomposition process
This invention addresses critical water scarcity issues while converting human waste into valuable agricultural fertilizer, completing the human nutrient cycle. It provides sustainable sanitation solutions for rural and water-scarce regions, reducing dependency on industrial fertilizers and sewage treatment infrastructure. The system promotes environmental conservation, improves public health, and supports agricultural productivity through nutrient recovery.
Primary applications include rural sanitation, water-scarce regions, eco-friendly communities, and sustainable housing projects. Suitable for schools, community centers, and residential complexes seeking water conservation. Applicable in organic farming operations requiring natural fertilizers, disaster relief situations, and areas lacking sewage infrastructure. Also beneficial for eco-toilets in parks, camping sites, and remote locations.