Vermifiltration wastewater system

The proposed system consists of a primary vermiculture compost plant, followed by a sludge and sediment filter, and then a single-pass trickling filter. In the primary tank, worms break down kitchen and garden matter, grey and black water, transforming it into humus. Aerobic bacteria then treat the humus and water as it passes through the organic matter and an integrated filter into a sub-chamber. The treated water is pumped into a raised sludge and sediment filter, designed for easy access during cleaning and maintenance. Gravity transfers the water into a second tank, where it undergoes further treatment through a slow trickling process facilitated by aerobic bacteria. Finally, the processed wastewater is pumped over 100 meters away from the Hawkesbury River and dispersed through trenches. The system achieves secondary treatment level and its chemical-free operation aligns with sustainable practices essential for protecting sensitive environments.

This system was chosen over a sand filter as it does not require extensive excavation that may disrupt the ecosystem. Its installation involves minimal disturbance to the natural environment, preserving vegetation and wildlife habitats, and relies on biological processes to treat wastewater. It also presents significant advantages over AWTS (Aerated Wastewater Treatment Systems) for this off-grid and remote site. It does not depend on electricity to aerate wastewater and does not require frequent servicing. In addition, it is able to cope with intermittent usage.