To sterilize or treat a composting toilet pile or residual waste with hydrated lime, add a minimum of 30 grams of hydrated lime per 1 kilogram of waste (roughly equivalent to 1 to 2 cups of lime per 5 gallons of waste material). [1] (https://www2.gov.bc.ca/assets/gov/environment/waste-management/sewage/provincial-composting-toilet-manual.pdf), [2] (https://www.justanswer.com/research/qktj6-i-m-looking-hydrated-lime-use-human-waste.html)How to Mix It InMix thoroughly: After you add the hydrated lime powder or slurry, stir and mix the pile completely to distribute the lime evenly.Test the pH: Aim for a high alkaline pH level (ideally above 12) to effectively kill harmful bacteria and reduce pathogens.Use safety gear: Always wear a face mask, gloves, and eye protection because hydrated lime is a caustic powder that irritates skin and eyes
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Do not overdo it: Adding too much lime (above 3% of total volume or high concentrations) can disrupt the beneficial microbes needed for proper composting, stall the breakdown process, and create bad odors. [1, 2]
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