Using of bio septic tanks is one of the waste water treatment processes. It is one of the recycle processes without any labour source. This process does not require much space and money. Once when the septic tanks are used, it must be maintained and cleaned with some labour source. Once it is not maintained there may be a chance for overflow in the tank. It wills also leads to several disorders and creates severe health issues. The water which is gained after the recycled process is used for gardening. The tank used for this process is not plastic, it is concrete. The fitting process is one of the easiest processes and does not take time.