When garbage grinders are used in a septic system, by what percentage should the tank capacity be increased?

When garbage grinders are used in a septic system, it is recommended to increase the tank capacity by 50%. This is because garbage grinders introduce additional solids and organic material into the septic system, which can significantly impact the performance and efficiency of the system. The increase in tank capacity helps accommodate the extra volume and ensures there is sufficient space for effective anaerobic digestion of these materials.

Garbage grinders contribute to a higher accumulation of sludge and scum in the tank, necessitating more frequent pumping and maintenance. The 50% increase in tank capacity is based on the understanding that the additional solid waste generated by garbage grinders can overwhelm a standard septic tank designed for typical household waste, potentially leading to system failures or backups.

This practice ensures longevity and effectiveness in managing waste in septic systems utilizing garbage grinders, as the additional capacity allows for better settling and treatment of solids. Thus, recognizing the need for this capacity increase helps in proper planning and installation of septic systems that accommodate modern waste disposal methods.