Optimisation of existing assets using intelligent dissolved air flotation
Gray, J.1 and Menkveld, W.2, 1Nijhuis UK and Ireland, 2Nijhuis Water Technologies, the Netherlands
(free)
To generate additional capacity from existing municipal WWTP assets, innovative solutions can be implemented. This presentation will focus on how WWTP sustainability can be increased by including advanced pre-and-post treatment solutions, using intelligent Dissolved Air Flotation (i-DAF).
The presentation will include a number of business cases, demonstrating performance results of i-DAF trials, and highlighting additional TOTEX benefits of i-DAF technology. Business cases will include the results of a primary DAF pilot trial at the municipal WWTP of Rijn and IJssel in the Netherlands, and a separate tertiary pilot i-DAF trial at Macclesfield WWTP to investigate efficient phosphorus removal.
The primary trial demonstrated that DAF can increase TSS removal by >90%, when compared to a traditional PST. Alongside a significantly reduced footprint, increased primary sludge removal via DAF will also enhance biogas generation, and will remove load on downstream treatment processes, improving WWTP throughput and efficiency.
The tertiary i-DAF pilot trial demonstrated efficient Ptotal removal to a treated effluent value of 0.2-0.4mg/l, with a removal efficiency of >95%, can be easily achieved. Alongside Ptotal removal, tertiary i-DAF will polish final effluent, safeguarding treated effluent standards of highly loaded WWTP’s with a robust, low footprint, low chemical consumption, and low maintenance solution.
