With the daily ever growing urbanization, you will agree with me that the impact on the environment is very adverse due to sewage disposal. Sewage can be from the households or the industries in towns. You will not be comfortable to observe dirty water released into you area of locality if it has not been properly treated or purified. Those that contains pollutants needs to be treated so that its quality can be improved. This means that its negative impact on the environment is so much reduced. By so doing we will be promoting biodiversity and preventing health hazards. To be precise, we ought to have a waste water purification system that is very efficient.
There are several steps in the process of treating those that is already contaminated. This is so that the contaminants are removed. Physical, biological and chemical approaches are utilized in all these steps.
To begin with is the pretreatment stage. It prepares it to be treated. Sieving is used to remove all big objects that can be gotten rid of. Large screens bar these items. Mesh can also be used alongside other barriers. These large objects are a threat to the system because pipes can get blocked. Then the end result will be the malfunctioning of the system.
To add, primary treatment stage involves removal of sediments settling down at the sedimentation tanks. Floating objects are also removed through skimming. Clarifiers are also useful at this stage. The resulting material that has been collected can be used in soap making process.
Besides, is the secondary treatment stage. Majorly, those contaminants that are cleared in this stage are those from living organisms such as fecal matter. Most of them are already dissolved but only a few can be in suspended. Living organisms are reared in water and are made to eat up the matter thus promoting decomposition. It saves on space.
Fourthly, is tertiary treatment. This step can be considered as the last one in most of the systems. However, other systems have an additional step. The effluent is made better and quality is improved before being released into the surrounding locality. Filtration of very fine particles occurs to remove toxins thus the resulting liquid is clean. Besides, nitrogen and phosphorus are removed.
In the final part of this step, this liquid is taken into ponds and dams. Here, the biological agents assist in removing the remaining pollutant matter. Then this water can be used for irrigation purposes. Recharging the ground water sources can be another use.
Lastly, is the fourth treatment stage. It is under trials and has already been incorporated in the systems of some purification plants. It involves removal of chemicals that decompose very slowly thus stays for very long time in the polluted water. This part should include the control of odor into the environment.
There are several steps in the process of treating those that is already contaminated. This is so that the contaminants are removed. Physical, biological and chemical approaches are utilized in all these steps.
To begin with is the pretreatment stage. It prepares it to be treated. Sieving is used to remove all big objects that can be gotten rid of. Large screens bar these items. Mesh can also be used alongside other barriers. These large objects are a threat to the system because pipes can get blocked. Then the end result will be the malfunctioning of the system.
To add, primary treatment stage involves removal of sediments settling down at the sedimentation tanks. Floating objects are also removed through skimming. Clarifiers are also useful at this stage. The resulting material that has been collected can be used in soap making process.
Besides, is the secondary treatment stage. Majorly, those contaminants that are cleared in this stage are those from living organisms such as fecal matter. Most of them are already dissolved but only a few can be in suspended. Living organisms are reared in water and are made to eat up the matter thus promoting decomposition. It saves on space.
Fourthly, is tertiary treatment. This step can be considered as the last one in most of the systems. However, other systems have an additional step. The effluent is made better and quality is improved before being released into the surrounding locality. Filtration of very fine particles occurs to remove toxins thus the resulting liquid is clean. Besides, nitrogen and phosphorus are removed.
In the final part of this step, this liquid is taken into ponds and dams. Here, the biological agents assist in removing the remaining pollutant matter. Then this water can be used for irrigation purposes. Recharging the ground water sources can be another use.
Lastly, is the fourth treatment stage. It is under trials and has already been incorporated in the systems of some purification plants. It involves removal of chemicals that decompose very slowly thus stays for very long time in the polluted water. This part should include the control of odor into the environment.
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