How does biological growth affect a leaching trench?

Biological growth in a leaching trench primarily leads to clogging, which can significantly impede the system's overall functionality. In a leaching trench, which is designed to allow wastewater to percolate through soil, the presence of organic matter and microorganisms can create a dense layer of biofilm. While some biological activity is beneficial, excessive growth can accumulate and form blockages, preventing proper water flow and filtration.

Clogging limits the trench's ability to effectively treat wastewater, leading to potential oversaturation and backflow issues. This can degrade the efficiency of the leach field, possibly resulting in environmental impacts and health risks due to the inefficient absorption of wastewater into the soil. Understanding the balance of biological growth is crucial for maintaining the operational integrity of a leaching trench, highlighting why clogging is the primary concern in this context.