Have you ever thought that after you flush the toilet or wash the dishes, what happens to the wastewater?
That wastewater goes somewhere. And that somewhere is a wastewater treatment plant or a private septic system.
In most urban environments, when you flush the toilet, the waste is drained out to a sewage treatment plant. That plant treats and separates the waste into water that is clean enough to be discharged into a water body and solids into residual waste. This residual waste gets land filled or can be used as fertilizer. In rural areas where houses are spaced far apart, connecting houses with a sewer system would be expensive due to limited resources available to the Government agencies, septage treatment plants do the same thing, but on a much smaller scale. People install their own private septage treatment plants called as septic tanks.
Wastewater leaves the house and empties into an underground septic tank that’s usually few feet away from the house. Septic tanks are made from reinforced cement concrete, masonry or heavyweight plastic.
What is the concept of Septage treatment?
There are two chambers in the septic tank, separated by a partial wall.
Wastewater flows from the house into the larger chamber. Solids drop to the bottom of the tank and create sludge, and liquids make their way over the partial wall into the smaller second chamber. Oil and grease rise to the top to create scum. Naturally occurring anaerobic bacteria digest the sludge, turning them into the water, carbon dioxide, and a small portion of indigestible material. Large amount of grease and oil can slowdown the bacterial action in the septic tank that is why grease traps are incorporated between the kitchen sinks and septic tanks to trap grease before it enters the septic tank. The grease traps need to cleaned periodically.
The main job of a septage tank is to clean dirty household water that comes from bathrooms, laundry rooms, and other areas of your home. This water then gets filtered out into the area around it where it is fully cleaned.
Septage tank systems work by using:
• Gravity to move wastewater
• A holding tank for the wastewater
• Anaerobic bacteria inside the tank
• Drain fields
• Aerobic bacteria outside the tank
In simple steps septage tank system works in following sequence:
Step 1. Wastewater from the house flows into the septage tank;
Step 2. Anaerobic bacteria naturally present inside it start breaking down some of the waste;
Step 3. Solid waste (sludge) sinks to the bottom of the tank and liquid waste (oils, fats, grease) rises to the top;
Step 4. The wastewater seeps into the next large chamber;
Step 5. This wastewater gets further treated by aerobic bacteria;
Step 6. The water is now clean and drains into groundwater;
Step 7. Once the septic tank is full, waste needs to be pumped out.
If you need any information about types of wastewater treatment plants best suited for you, get in touch with Netsol water solutions. An expert from our technical sales team can provide any additional information you require.
Netsol water is one of the leading water and wastewater treatment company in India with services in the field of WTP plant manufacturing, WWTP plant manufacturing. The company designs and manufactures all in one systems that are ideal for treating wastewater and the sludge generated at a private septage treatment plant.