Sewage wastewater treatment is the process through which pollutants are removed from the sewage and effluents. It essentially cleans the sewage and water so that it can be returned to the environment. This whole sewage treatment process essentially goes through four sets of operations. These are as follows:
1. Pretreatment Phase: In this phase, the plants remove the very easy pickings. In other words, it takes large items such as tree limbs, garbage, leaves, cans, rags, and other waste materials.
2. Primary Treatment: After the pretreatment phase, the wastewater gets collected in clarifiers that are large basins and sedimentation tanks. Sedimentation tanks work on the principle of gravity that allows smaller particles to settle at the bottom. The scrappers in the plants remove the grease and other sticky material. Sludge treatment is provided to remove the dirt.
3. Secondary Treatment: The next phase is concerned with aerating and agitating wastewater in secondary basins. These add beneficial microorganisms to break down the organic matter into sludge. A lot of alternative strategies are allowed to breaking down the sludge.
4. Sludge Treatment: Then there comes the final phase, through which our main article is concerned. The last stage deals with treating the remaining water, biosolids, or sludge. After the water is filtered, how to treat the waste remains the big question. But it’s exciting to know that the remaining sludge or the more complex material is passed on to the thickener, where it is centrifuged and fed to the digesting tanks containing anaerobic bacteria. The methane produced in the plants is used to power them. Therefore, the final solid product is stabilised, deodorised, and ploughed into the soil as a fertiliser.
Now, having understood the treatment of the waste, it is essential to know whether a sewage treatment plant can be dangerous for a neighbourhood or not?
Well, people living nearby these wastewater plants may have to face some problems. These are explained here as below:
1. Airborne Hazards: Whenever organisms, chemicals, or bacterias find their way to move in the air, this becomes an airborne hazard. These chemicals from wastewater treatment facilities become airborne, which, when inhaled, exposes people to cause risk to their health.
2. Respiratory and Gastrointestinal Infections: Whenever the chemicals go to the air and are inhaled, they directly go into our bronchial tubes and lungs. These are after that swallowed, which ultimately causes eye irritation, depression, and central nervous system damage.
3. Pests: Sewage attracts flies. These houseflies, cockroaches and flies pose a danger to human health. They carry millions of pathogens and hence becomes a danger for those living near the waste treatment facilities.
After assessing all the points, we concluded that living near a wastewater treatment plant involves a cost. Hence, it would be best to select an area with a wastewater treatment plant that is equipped with adequate safeguards to save you from upcoming dangers.