The most common type of sewage treatment system is the centralized treatment plant. In this system, sewage from homes and businesses is collected and transported to a central treatment facility. The sewage is then treated using a variety of processes, including screening, sedimentation, biological treatment, and disinfection.
After treatment, the effluent (treated sewage) is discharged into a river, lake, or other body of water. Centralized treatment plants are effective in removing pollutants from sewage, but they can be expensive to build and operate.
Another type of sewage treatment system is the decentralized treatment system. In this system, sewage is treated on-site using a variety of technologies, including septic tanks, aerobic treatment units, and composting toilets. Decentralized treatment systems are less expensive to build and operate than centralized treatment plants, but they are not as effective in removing pollutants from sewage.
However, water that has been treated by a decentralized treatment system may not be as clean and may contain harmful bacteria and other contaminants. It is important to note that even water that has been treated by a centralized treatment plant may not be completely clean and may still contain some pollutants.
If you are concerned about the quality of your water, you can have it tested by a laboratory. The laboratory will test the water for a variety of pollutants, including bacteria, viruses, and chemicals.