Before beginning with the discussion about secondary treatment of wastewater, let us ask the primary question: What is wastewater treatment? Wastewater treatment, as the name suggests, is a process used to treat various types of wastewater or sewage, and convert it into an effluent that can be released into the water bodies. It is used to minimize the ramifications of wastewater on the environment. What is the Secondary Process used in sewage treatment plants in India? It is preceded by the primary treatment of wastewater. Secondary treatment is used to break down the biological waste. Typically, biological processes or aerobic biological processes are used here, which is then followed by tertiary treatment of wastewater. What are the different processes used by secondary treatment plants? There are several kinds of processes used in the second stage of wastewater treatment. Following are a few conventional ones: Activated Sludge This process uses an aeration tank where the effluent flows into it after going through the primary treatment. Activated sludge or the deposits that are bacteria-rich are mixed with it. The mixture is allowed to rest in ample of air with oxygen supply which helps the organisms break the organic matter. Later on, the sludge is separated in the tank from the treated wastewater. Trickling Filters Here a bed of crushed rocks, Rockwool, or any other coarse medium is used for sewage treatment. Sewage is spread over the medium, and the effluent trickles down through it which has layers of microorganisms that help break down the sewage particles. These filters help to remove up to 85% of pollutants. Oxidation Ponds Also known as stabilization ponds, these are large pond-like structures designed for wastewater treatment. Algae is used for the desired result here. Similar to the aeration tanks in activated sludge method, algae deliver a steady supply of oxygen. They use sunlight and produce oxygen via the photosynthesis process. This method is typically used for a small population where land is readily available. Reach out to us at 079-4003 6917 for more information on sewage treatment plants in India. We will aid you in the best manner.
0 Comments
Leave a Reply. |
Cleantech Water
Archives
June 2019
Categories
All
|