The plant needed to be suitable for 300 population equivalent (PE) to meet the British Water code of Practice. It was determined that a SAF300N5 module was the best solution to meet its client’s brief.
Submerged Aerated Filter (SAF) technology
SAF technology was developed over three decades ago and is based on well-established and robust fixed film technology used for the biological treatment of both municipal wastewater and industrial effluent. SAF units are typically a three-tank system comprised of a primary settlement tank, the SAF Biozone and a secondary clarifier (humus tank). The SAF Biozone operates as an up-flow system, with internal air distribution and separate water distribution systems.
When combined with high surface area, high voidage filter media, the Biozone achieves high removal efficiencies and there is also a low sludge return recirculation rate which helps reduce the operating costs.
Premier Tech chose Biomarble 310 which provides a large surface area on which bacteria attach themselves to live and grow and improve oxygen mass transfer. Both air and wastewater are introduced into the base of the SAF unit simultaneously which enables a completely mixed system to develop almost instantaneously.
The combination of the higher protected surface area and open void ratio, ensures that a high active population of biomass can be maintained at high concentrations, thus maintaining process stability and reduced operational costs. The SAF300N5 module, with the help of Biomarble, can achieve high removal efficiencies compared with conventional SAF units.
“Our team members were expertly guided by the Warden team on the best filter media for this application and as a result have achieved very positive results from this treatment plant installation. Warden Biomedia is a very valuable partner, helping us meet and exceed our performance targets for the Port.”
Dr Evangelos Petropoulos, Technical Manager at Premier Tech
Premier Tech were proud to service DP World and support the expansion project at the London Gateway Port, combining professional engineering with the Warden’s sustainable filter media to provide the most efficient solution.
