Wastewater membrane and filters manufacturers in India. Wastewater treatment filters are used to produce water fit for reuse. Wastewater treatment is done in three main stages: primary, secondary and tertiary stages. The primary stage involves the removal of debris through filtration of small and large particles, then a biological process is used to further purify the water in the secondary stage and, in the last stage, the water quality is improved through various chemical processes which makes it fit for reuse or safe discarding to the environment. Filtration helps in removing particles and debris from wastewater and makes it possible to reuse, it also aids in the treatment of groundwater which percolates through the soil, and harmful chemicals and metals like lead are removed through filtration.