SUBMERGED AEROBIC FIXED FILM TECHNOLOGY
(SAFF TECHNOLOGY)

It is based on aerobic attached growth process and used in the secondary treatment of wastewater treatment plant. In this process raw sewage is introduced into the SAFF Reactor where for attached growth process takes place containing contains polymer based bio-media. The aerobic environment in the SAFF is achieved by the use of fine bubble diffused aeration equipments, which also serves to maintain the mixed liquor in a completely mixed regime. The mixture of new cells and old cells overflows into a secondary sedimentation tank where the cells are separated from the treated wastewater. A portion of the settled cells is recycled using the horizontal, non-clog, and flooded pumps to maintain the desired concentration of organisms in the SAFF reactor and the remaining portion is wasted to aerobic sludge digester-cum-thickener tank for further sludge treatment.

Advantages

• No constant monitoring of MLSS required thus making it user friendly.
• No chance of occurring septic conditions due to power failure as it sustains microbial growth under irregular
      power supply conditions.
• Less maintenance as there is no moving parts.
• Less sludge generation hence reduced problem of sludge disposal.
• The fixed-film process will continually slough off outer layer(s) of dead bio film and continue to produce new
       microorganisms to meet the organic load.
• Low power consumption due to high oxygen transfer.