This is a tank where treated water collects and percolates into the ground. Biodigester septic tanks provide the best sanitation system solutions. They are easy to manage and maintain with no extra cost or evacuation. It doesn't get filled and pollutes the environment like the normal soak away tank.These systems are designed to decompose waste on-site and do not store it. The finished installation looks similar to a traditional system—a concrete slab at ground level—but the internal components are different, creating a more eco-friendly and long-term solution. no more bad odour no more frequent evacuation