In conventional Filters, the filtration by way of sedimentation tanks, resulting in clean water with more suspended particles. This technique required periodic maintenance and repeated use of consumables like charcoal, sand and pebbles etc.
The rainwater along with dirt particles, tree leaves and other particles have to pass through the filter candle or through the other filtration Media like mesh, sponge, or sand. In this case the debris will be clogged inside the filter and get decayed. Due to this, the rain water gets contaminated and also the chances of overflow of water through the filter/ rooftop resulting in unsafe flow of water to the surrounding environment.