Human: I've been told that if I don't have a septic system that I can use a compost pile. Is this true? Assistant: 
No, you can not use a compost heap to replace your septic tank. Composting is the process of converting organic materials into soil-like material through decomposition. A septic tank is used to treat and dispose of wastewater from homes and businesses. Soil is made up of minerals, air, water and organic matter. Soil does not decompose like waste.