Submerged Aerobic Fixed Film Reactor (SAFF) Media Manufacturers in India
One of the cost-effective methods of waste water treatment
and sewage management that is primarily used in residential and commercial
complexes is SubmergedAerobic Fixed Film Reactor (SAFF). This technology mainly has three
stages that are Primary Settlement, Secondary Treatment and Final Settlement /
Clarification.
Primary Settlement: Here, larger solids get settled
at the bottom of the primary tank and are removed periodically as sludge. Other
buoyant material which floats upwards are usually removed by a scraping/screening
method.
Secondary Treatment: Where the biodegradable
Organic Matter is degraded by the biomass on the SAFFmedia.
Final Settlement / Clarification: Where degraded
solids are settled out of the biologically treated effluent.
Submerged Aerated Fixed Films (SAFF) technology is
a process used to reduce the organic loading of residential and commercial
sewage / waste water. The process works towards the reduction of Biological
Oxygen Demand (BOD) and a significant quantity of Suspended Solids (SS) which
if otherwise untreated would contaminate river and other water outlets. In
simple words, SAFF process is used to substantially improve effluent discharge
quality.
In the wastewater industry, SAFF Technology is seen
as the simple and cost-effective method of commercial and residential sewage
sanitation/waste water treatment, particularly for small to medium sized
treatment plants where available land is limited, and where fulltime
operational manning would be uneconomical. A well designed Submerged Aerated
Filter plant has no moving parts within its process zones, any serviceable
items will be positioned to access easily without disrupting the ongoing
treatment.
Advantages
- Deep reactors enabling small space requirements
- No sludge re-circulation is required to maintain MLSS as in the case of conventional aeration system.
- Can be designed to any size to deal with larger flow and loads.
- Modular design allows easy installation.
- Use of fine bubble diffused aeration generally reduces the energy requirements as compared to surface aerators.
- Ability to effectively treat dilutes domestic wastewater.
- Low & stabilized sludge production eliminating the need for sludge digestion.
- Higher loading of BOD on the media enables to reduce the aeration tank size. SAFF requires 25-40% lesser tank volume as compared to activated sludge process.
- SAFF process able to achieve 95-98% BOD reduction.
- High MLSS – Less Space required for the treatment.
- Less susceptible to upsets due to flow variations.
- SAFF supports low sludge generation, low Odour and low visual impact.
- Maintenance requirements are simple.
Disadvantages
- High reliance on external energy input.
- Clogging of reactor due to absence of primary sedimentation.
- Requires skilled manpower.
- Reliance on proprietary filter media.
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