Sewage Treatment in Chennai

Sewaf Energy is a well known company offering Sewage Treatment Plant, renowned for its durability and high quality. The offered plant is manufactured under the vigilance of our experienced professionals and utilizing branded quality components. The Domestic Sewage Treatment is available in various specifications as per the specific need of clients. We pay special attention to commissioning so as to meet the prescribed standards of Pollution Control Boards.

The domestic wastewater that is discharged from households, Industrial houses and complexes, municipal wastewater is generally termed sewage. As per the Government norms and various regulations, these sewage waters cannot be directly discharged into rivers and lakes, and needs to be treated in sewage treatment plants. The treated water can be reused in horticulture, cooling tower, washing operations depending on degree of treatment. Sewaf Energy is one of the leading Sewage treatment plant manufacturer and suppliers in Chennai.

Primary Treatment

In primary treatment, sewage is stored in a basin where solids (sludge) can settle to the bottom and oil and lighter substances can rise to the top. These layers are then removed and then the remaining liquid can be sent to secondary treatment. Sewage sludge is treated in a separate process called sludge digestion.

Secondary Treatment

Secondary treatment removes dissolved and suspended biological matter, often using microorganisms in a controlled environment. Most secondary treatment systems use aerobic bacteria, which consume the organic components of the sewage (sugar, fat, and so on). Some systems use fixed film systems, where the bacteria grow on filters, and the water passes through them. Suspended growth systems use “activated” sludge, where decomposing bacteria are mixed directly into the sewage. Because oxygen is critical to bacterial growth, the sewage is often mixed with air to facilitate decomposition.

Tertiary Treatment

Tertiary treatment (sometimes called “effluent polishing”) is used to further clean water when it is being discharged into a sensitive ecosystem.

Several methods can be used to further disinfect and purify sewage beyond primary and secondary treatment.

Sand filtration, where water is passed through a sand filter, can be used to remove particulate matter.

Wastewater may still have high levels of nutrients such as nitrogen and phosphorus. These can disrupt the nutrient balance of aquatic ecosystems and cause algae blooms and excessive weed growth. Phosphorus can be removed biologically in a process called enhanced biological phosphorus removal. In this process, specific bacteria, called polyphosphate accumulate organisms that store phosphate in their tissue. When the biomass accumulated in these bacteria is separated from the treated water, these biosolids have a high fertilizer value. Nitrogen can also be removed using nitrifying bacteria.

Lagooning is another method for removing nutrients and waste from sewage. Water is stored in a lagoon and native plants, bacteria, algae, and small zooplankton filter nutrients and small particles from the water.