What Types of Waste Can Go in a Composting Toilet?

Types of Waste Accepted in Composting Toilets

Composting toilets like Nature’s Head and Separett are designed to handle human waste, including urine and feces. Generally, these toilets can accept up to 50% of toilet paper’s dry weight. However, it’s recommended to shred or tear toilet paper before adding it to the composting process to prevent matting and ensure proper aeration. Some models can also handle small amounts of cotton, cloth, or other natural fibers. For example, Nature’s Head recommends adding 1-2 sheets of toilet paper per flush, while Separett advises up to 3 sheets.

Prohibited Waste in Composting Toilets

Certain items should be avoided in composting toilets to prevent contamination and ensure proper composting. These include:

• Plastic, polypropylene, or other synthetic materials
• Paper towels or wet wipes (which can introduce pathogens and oils)
• Diapers, sanitary products, or other disposable hygiene items
• Pet waste or other animal byproducts
• Any items containing chemicals, pesticides, or other contaminants
• Excessive amounts of tissue or paper products

Maintenance and Safety Considerations

Regular maintenance is crucial for optimal composting and to prevent odors and contamination. This includes:

• Regularly adding carbon-rich materials (like straw or shredded newspaper) to balance the nitrogen-rich compost
• Ensuring proper ventilation and airflow in the composting toilet
• Maintaining the correct moisture levels (usually between 40-60%)
• Monitoring temperature (compost piles should reach 131°F for 15 days to kill pathogens)
• Following manufacturer guidelines for maintenance and upkeep