WarraniumSAF - Submerged Aerated Filter
The WarraniumSAF Submerged Aerated Filter or SAF is a very compact, robust and trouble-free process ideally suited to package type plants for communities and labour camps. The process employs a structured, support media and this forms an ideal place for the biomass to attach itself. The wastewater then passes through the matrix where the biomass consumes the organic matter.
The connections underneath will take you to more information on each of the designs.
The WarraniumSAF media is a non-clogging structure, fixed
set up and with a very high surface area for the volume, it
occupies. It fits fully submerged in the biozone. The water
goes through the cross fluted media in an exact way, flowing
through every part ensuring excellent contact with the
biomass. Air is introduced underneath and the media ensures
very high oxygen transfer rates, allowing for small air blowers
and reduced running costs. After the biozone, a standard
settlement tank is used to elucidate the water of any biomass
that has segregated itself from the support grid. The is no
requirement for a sludge recirculation system.
WarraniumSAF Biozone Flow Pattern - Cross-section
schematic showing the water flow pattern within the biozone.
The careful placement of the air sparge pipes supply the
diffused air with a very high oxygen transfer efficiency, close
to fine bubble air diffusion system. Above the air sparge pipes,
the water flow is ‘air-lifted’ and then allowed to gravitate
down, causing a circular, fully mixed flow within the biozone.
The water flow pattern provides excellent contact between the
water and its nutrients and the biomass attached to the media.
A further benefit is a very long sludge age, partial de-
nitrification, low sludge production and low energy
consumption.
The plant does not need constant operator attention and is
happy to run in automatic mode for extended periods.
WarraniumSAF plants deliver a very high quality of effluent to
meet the highest standards specified, including a fully nitrified
Treated Sewage Effluent (TSE). The WarraniumSAF attached
growth technology can be added to existing plants to upgrade
the final effluent, in particular for plants suffering high
ammonia levels in their effluent. Often the WarraniumSAF
Biozone, dedicated to ammonia removal is sufficient but in
other cases, a further settlement tank will be needed.
For complete de-nitrification the Warranium submerged,
attached growth technology used in the WarraniumSAF is
modified to an anaerobic process call the WarraniumSNAF
(Submerged Non-Aerobic Filter). With hydraulic circulation,
nutrient and alkalinity dosing, the effluent can be fully de-
nitrified in cases where nitrates would be unacceptable in the
receiving waters.
Warranium Energy has standardised WarraniumSAF plants
which are ISO Container sized for easy, worldwide shipping.
The capacities of these standardised plants are: 50 m3 per day
up to 1000 m3 per day all with tertiary treatment giving an
effluent quality of 10 mg/l BOD and 10 mg/l suspended
solids. These can serve 250 persons - 5,000 persons.
Larger sizes are individually sized and manufactured up to
municipal sized plants with either steel fabricated tanks or
locally constructed concrete tanks.
The WarraniumSAF process is ideal for upgrading and
increasing the capacity of existing treatment works by utilising
the tank work in place. Below is a photo of an old activated
sludge plant having its aeration tank upgraded with Modular
WarraniumSAF technology. All prefabricated and factory
tested for rapid installation and minimal disruption.
WarraniumSAF plants are often in stock for immediate
despatch worldwide.