WPL have undertaken substantive research and development into energy saving options for their HiPAF submerged aerated filter sewage treatment range. This research has been undertaken with a view to reducing the whole life costs, energy consumption and carbon footprint, in line with the Water Utility 2020 initiatives.
As part of WPL's continuous product development, research work has taken place over the last 18 months on sites where WPL HiPAF plants have been installed, and provide real data that confirm assumptions made during the design and feasibility stages. The research work has been centred around the design of the aeration system and various scouring regimes, along with trials of different media configurations and blower efficiency.
The HiPAF benefits from being a low maintenance treatment solution, with the emphasis on reducing moving mechanical parts within the hostile environment of the treatment plant. However, savings of between 15% and 50% on electricity consumption provide a significant reduction in whole life costs, particularly in higher population equivalent applications. Dual speed blowers utilising variable speed drives is one option that has had favourable reviews from clients, and other design efficiencies both with regard to blower design and media configuration have brought significant savings to some existing clientele.