Sewage treatment plants are used for removing harmful bacteria and parasites from waste material .The layout and process streams are designed in such a way that plant operates with minimum shutoff. It is the best way to improve the structural stability of the soil. We should choose sewage plant design according to our needs and requirements.
What is sewage treatment?
Sewage treatment is a method by which we can remove contaminants from water. Sewage is basically a combination of industrial and domestic wastes. It contains harmful bacteria, suspended solid and ions.
The untreated sewage negatively affects the environment as well as human health, so it is very crucial to focus on waste management through various sewage treatment plants. The sewage can be treated in septic tanks and bio filters. Sewage treatment is also known as wastewater treatment. It is of two types-On-site System and Effluent system.
How does sewage treatment plant works?
The working of sewage treatment is similar to the septic tank. Mechanical components are used to break the solid particles for producing clear liquid. Wastewater and sewage are fed into primary settlement tank in order to separate solid and liquid particles. Then pump aerates the waste for breaking and purifying the organic matter and after that it leaves from humus chamber and that time the effluent is almost 95% clean and ready for its disposal into water bodies and drainage systems.
Why do we need to treat sewage?
Sewage contains phosphorous and when it is discharged into water it causes excessive aquatic plant growth that leads to water degradation.
Sewage can be recycled for different purposes like cooling, toilet flushing, car wash and many more.
Untreated sewage contains bacteria and parasites and exposure to such waste can cause severe illness and diseases. So it is very important to treat waste before releasing it into water.
Phases of Sewage Treatment
In this phase of sewage treatment, large solids and grits are removed by the process of screening and it is then disposed in landfills.
After pretreatment, the solid particles come to bottom and oil and grease comes upwards. The solid particles then scrapped off and scum is removed and these substances combine to form sludge.
In this phase sludge is treatment is treated in a sludge digester and sludge is converted into biogas which is a mixture of CH4 and CO2 gases and this gas is used for generating electricity for the plant. The liquid is then treated by the bacteria which break the remaining organic matter .After that it is sent to the oxidation ponds where heterotrophic bacteria again break down the organic material and then solar UV light destroys the harmful bacteria.
Sewage treatment plants are used for effective waste management. It is important to treat waste in order to make our environment pollution free. Land is very expensive these days, so companies should choose the right designs so that sewage treatment plants can be installed anywhere.