Why SAFF (Submerged Aerated fixed Films) based Sewage Sanitation Systems for Commercial and Residential Sewage / Waste water treatment?
Within the wastewater industry SAFF Technology is seen as the simplest and most 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 full time operational manning would be uneconomical. A well built Submerged Aerated Filter plant has no moving parts within its main process zones, any serviceable items will be positioned to access easily without disrupting the ongoing sewage treatment. CHOOSING SUBMERGED AERATED FIXED FILM TECHNOLOGY FOR COMMERCIAL AND RESIDENTIAL SEWAGE / WASTE WATER TREATMENT RESULTS IN:

	Predictable performance
	Lower operation and maintenance costs
	No interruption to process
	Better whole life cost
	Easy installation

SUBMERGED AERATED FIXED FILMS (SAFF) TECHNOLOGY Submerged Aerated Fixed Films (SAFF) technology is a process used to reduce the organic loading of residential and commercial sewage / waste water, and in doing so will reduce the Biological Oxygen Demand (BOD) and a significant quantity of Suspended Solids (SS) which if otherwise untreated would contaminate river and sea outfalls, in other words it is used to substantially improve effluent discharge quality.
As with traditional sewage treatment, Submerged Aerated Fixed Films technology uses three stages of dealing with commercial and residential sewage / waste water:

	Primary Settlement
	Where larger solids settle into the bottom of the primary tank and are removed periodically as sludge, and where other buoyant materials float upwards to be removed usually by a scraping/screening method.
	Secondary Treatment
	Where larger solids settle into the bottom of the primary tank and are removed periodically as sludge, and where other buoyant materials float upwards to be removed usually by a scraping/screening method.
	Final Settlement / Clarification
	The usual design criteria is to produce an effluent quality typically better than BOD 30 mg/l & SS better than 100 mg/l. Without additional nitrification and treating, normal domestic sewage ammonia discharges are around 10 mg/l.

DISCHARGE QUALITY The usual design criteria is to produce an effluent quality typically better than BOD 30 mg/l & SS better than 100 mg/l. Without additional nitrification and treating, normal domestic sewage ammonia discharges are around 10 mg/l.