Highlights On Waste Water Purification System

By Kenneth Howard


As we advance in the promotion of our lives, we promote urbanization. It is a good thing because we feel good staying in cities and developed urban areas. On the other hand, the environmental hazards that result due to urbanization are so many. This is because the sewage from the cities are not properly managed and taken care of. It scares you I suppose, when you view a sewage being directed into a river before it is treated. This is harmful to our health and therefore needs to be treated for our well being. In a nutshell, an effective waste water purification system should be put in place.

In the procedure of purifying the already polluted water, various steps are employed. They utilize chemical agents, living organisms and physical agents to remove the harmful agents already present in water.

The beginning stage is pretreatment. This is actually before the actually treatment process begins. The liquid is prepared for purification by getting rid of the pollutants that can be collected in this step through sieving. Barriers and mesh that traps these big objects along the path of the fluid are used. The objects are then destroyed through exposure to very high temperatures in the incinerator. Sand, marbles or even mirrors can be collected. The system can be put at risk of failing if these objects are not removed at this earlier stage. This is because they will cause blocking of pipes.

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.

At the distal part of this phase, the liquid ater is collected into lagoons or ponds and biological cleaners are introduced to clean the liquid. The microorganisms feed on decaying matter in the dirty liquid and it becomes clean. Agricultural, sports or transport sectors benefit a lot from the resulting liquid for irrigation of farms and the playgrounds not forgetting dusty roads. Such reservoirs that exist underground can be refilled using this water.

To end with is stage of fourth treatment. It has already been employed into a number of systems after detailed research on it. It removes those chemicals that rot at slow pace. In this stage also, the odor coming from the purification process needs to be effectively controlled.




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