Composting Animal and Human Waste for Fertilizer

Why This Skill Matters in an Emergency or Survival Situation

Composting animal and human waste for fertilizer is a crucial skill in survival scenarios. In emergencies, traditional waste disposal systems may fail, leading to environmental contamination and health risks. By composting waste, you can safely convert it into a valuable resource for growing food, thus ensuring a steady supply of nutrients for your crops. This process not only reduces the risk of disease but also enhances soil fertility, which is vital for sustaining life in a survival situation.

What You Need

Materials

Animal waste (manure from herbivores such as cows, sheep, or chickens)
Human waste (urine and feces)
Carbon-rich materials (leaves, straw, sawdust)
Nitrogen-rich materials (grass clippings, kitchen scraps)
Water

Tools

Compost bin or pile
Pitchfork or shovel
Hose or watering can
Thermometer (optional but recommended)

Knowledge

Understanding of composting principles
Basic hygiene practices for handling waste
Knowledge of local regulations regarding composting human waste

Step-by-Step Instructions

Prepare the Compost Bin: Choose a location that is well-drained and has good air circulation. If using a bin, ensure it is large enough to accommodate the volume of waste you will be composting. A minimum size of 3x3x3 feet is recommended.
Layer the Materials: Start with a layer of carbon-rich materials (about 6 inches thick). Add a layer of animal waste (about 2 inches thick). Follow with a layer of nitrogen-rich materials (about 2 inches thick). Repeat these layers until the bin is full.
Add Human Waste: Mix human waste with sawdust or straw to reduce odors and pathogens. Add this mixture to the compost pile, ensuring it is well-distributed throughout the layers.
Maintain Moisture and Temperature: Keep the compost moist but not waterlogged. The ideal moisture level is similar to a wrung-out sponge. Monitor the temperature using a thermometer. The compost should heat up to between 130°F and 160°F (54°C to 71°C) to effectively kill pathogens.
Turn the Compost: Turn the compost pile every 2-3 weeks to ensure even decomposition and to maintain proper aeration. This process helps to distribute heat and moisture evenly throughout the pile.
Curing the Compost: Once the compost has cooled and the materials have broken down into a dark, crumbly substance, it is ready to use. This process can take anywhere from 3 to 6 months, depending on the conditions.

Common Mistakes and How to Avoid Them

Not Layering Properly: Ensure that you layer carbon and nitrogen materials correctly to maintain the right balance for decomposition.
Insufficient Aeration: Turning the compost regularly prevents it from becoming compacted and ensures proper aeration.
Overwatering: Keep the compost moist but not soggy. Excessive water can lead to anaerobic conditions and the growth of harmful bacteria.
Not Monitoring Temperature: Regularly check the temperature to ensure it remains within the optimal range for pathogen destruction.

Variations, Tips, and Related Techniques

Bokashi Method: This method involves fermenting waste in a sealed container with a special bran inoculated with beneficial bacteria. It is particularly useful for composting human waste.
Sheet Composting: Spread compost materials directly on the soil surface and cover with a layer of mulch. This technique is ideal for large areas and can be used to improve soil fertility without the need for a compost bin.
Worm Composting: Use red worms to break down kitchen scraps and other organic waste. This method produces a rich compost known as vermicompost.

TLDR

Composting animal and human waste for fertilizer is essential in survival situations for maintaining soil fertility and reducing health risks. Proper layering, aeration, and temperature control are key to successful composting. Avoid common mistakes like overwatering and insufficient aeration. Consider variations like bokashi or sheet composting for different applications.