Once the water has been affected by either industrial, commercial, agricultural, or domestic activities then it will become wastewater. For this water to be reused and be useful again then it should undergo a wastewater treatment. Wastewater by itself cannot be used for regular consumption since it is already contaminated. For it to be useful again for consumption, wastewater treatment is necessary. The process aims to remove dirt, impurities, and other substances from the water. A wastewater treatment plant is one that does the different processes in order to ensure that the water will be reusable. A wastewater or sewage treatment plant is responsible for removing various pollutants from the water. These treatments plant utilizes various biological processes to help purify the water. A regular water treatment done from these plants will usually take around seven hours. The process can become longer depending on what contaminant or pollutant is present in the water. This is so much better compared to letting the environment purify and decontaminate the water on its own which can usually take weeks and even months. This becomes less efficient once contaminants are regularly present. For you to have a better understanding of how treatment plants make wastewater useable again then it is also important to know the different processes that they are doing.
One of the processes that treatment plants utilize is separation. This is the process where the removal of solids and even grease and oil are done. The process of removing the solids will depend on the concentration of impurities present in the water. Another process that removes solids from the water is sedimentation. This utilizes gravity to take away solid and other nonpolar liquids from the water. Most of these things are heavier than water and that is why they tend to accumulate at the bottom of the basin making separation easier.
Filtration is also another process to remove fine solids. These utilize filters that act as barriers to prevent fine solids to come through as the water passes to it. Once filtration is being utilized, chemical and biological processes also are being used to ensure better removal of impurities.
The process that helps reduce the toxicity of some impurities is what is called oxidation. This is also helpful in converting some impurities into solid, water, and carbon dioxide. The process of oxidation is being used in order to disinfect the water. Oxidation can be done in many different ways. One of which is biochemical oxidation. This is a process mainly used in treating water coming from agricultural and industrial areas. The process of oxidation is efficient in removing organic compounds. Another type of oxidation is through the utilization of chemicals. These are efficient in removing persistent pollutants that still remained in the water after all of the processes have been done. This process utilizes different chemical substances in disinfecting the water. This will help eliminate bacteria and other microbial molecules. The utilization of ozone to wastewater is what makes this process very effective.