Waste water treatment is popularly known as sewage treatment. The following are a few reasons why waste water treatment is carried out:
- The amount of pollutants and chemicals in the water render it hazardous.
- If such water is kept being released in the environment it can become a number one cause of water pollution.
- The millions of gallons of waste water must be treated before it is released into the environment to ensure general health safety.
What Are Waste Water Systems?
Waste water systems mostly compromises of used water. They may contain:
- Human waste.
- Scraps of food.
- Oil and chemicals present in water released by factories and machines.
- Waste water might even consist of storm runoff. The amount of rain washing up on the streets and roads is full of harmful pathogens and needs to be recycled.
Why Is It Necessary To Treat Waste Water?
The following are a few reasons why it’s necessary to treat waste water:
- To ensure the safe keeping of the fishing environment. The sea creatures need a safe and healthy habitat to survive. We in turn catch fish for our food. If the habitat is clean this ensures that the seafood we ingest is clean from harmful chemicals too.
- Healthy and safe water for recreational purposes.
- Dirty water is a carrier of many diseases. In order to ensure our complete health and safety it is necessary to recycle waste water.
The Major Aim Of Reverse Osmosis Desalination
Following are the few aims of reverse osmosis desalination:
- To remove an adequate amount of solids from the water.
- To aerate the water by putting back the oxygen in it so that it can sustain life.
The Waste Water Treatment Process
There are usually three levels of waste water treatment. These include:
- It aims to remove all sorts of solids from raw sewage water. It uses processes like screening and sedimentation.
- It can remove solid waste up to 50 to 60%.
- Mechanical treatment is the first treatment for any water treatment processes; it is also known as primary treatment.
- All organic matter which has escaped the mechanical treatment is eradicated using the biological treatment.
- The microbes devour the organic matter as it becomes their food thus ensuring its complete removal.
- Sedimentation allows the remaining solids to sink and the cleaned water is then filtered out.
- A treatment which is carried out after the biological treatment is known as tertiary treatment.
- It can remove up to 99% of the impurities and can even render water reusable for drinking purposes.
- However it can be pretty expensive and requires a great deal of latest technical knowhow to be performed correctly.
- Finally the water is disinfected using chlorination before it is released back into the environment.
- Most treatment plant designs try to carry out disinfection but it can increase the costs and often tends to be quite expensive.