What is the purpose of the nitrification lines?

The purpose of nitrification lines is to absorb treated sewage into the soil. Nitrification is a biological process that converts ammonia into nitrate by the action of bacteria in the soil. The nitrification lines are designed to facilitate this process by allowing the treated effluent from a septic system to be evenly distributed into the surrounding soil. This absorption is crucial as it not only helps in breaking down any remaining pollutants but also aids in filtering and purifying the wastewater before it percolates into the groundwater.

This essential role supports the overall effectiveness of a septic system by ensuring that effluent is adequately processed and that water quality is maintained, thereby protecting the environment. The other choices do not pertain specifically to the function of nitrification lines, as they involve different processes not directly related to the absorption and nitrification of treated sewage.