1. The Mechanical Stage
: collecting sewage inflow into first tank - The system develops un-aerobic conditions through preliminary sedimentation process. This process enables 40%-50% reduction of the BOD & TSS
2. The Biological Stage: Treated inflow inside tank "A" gravitates to the purification tank – This stage is based on extended aeration process using long retention time. The inflow is mixed with compressed air in special static mixing chamber situated on top of the tank. As a result, the organic solids are being disintegrated into small particles which multiply its surface as well as the organic load and purify the sewage. Unlike other systems, Bio-Robi excess sludge needs to be removed only once in a few years.
3. The Clarification stage: Purified inflow gravitates to secondary sedimentation tank – All residual solids which sink to the bottom of the tank are being