The bioseptic biodigester tank is a sewerage treatment system or an on-site sanitation system. The biodigester septic tank is used to treat sewer water and the treated water can then be used for other functions like watering gardens, irrigation flushing toilets and so on. This technology has been in use for centuries in Europe and it is becoming extremely popular in Kenya.

The sanitation system works through a process called Bacterial Biodegredation. This process completely breaks down organic matter or black water into gases and water. The gases produced are carbon dioxide, methane and nitrogen.

It takes just about 2 weeks for the breakdown of matter to be complete, ensuring that only water is discharged out of the tank. This is made possible by the combined action of both aerobic and anaerobic bacterias present in the tank. The bacterias are actually placed on the inside of the tank as it is being manufactured.

The treated water can then be taken to a soaking area or other place where it can be recycled for other uses. The carbon dioxide and the methane gas produced are simply released into the atmosphere while the nitrogen produced simply dissolves in the water. This nitrogen-rich water is great for watering gardens and irrigation.