American Society of Civil Engineers


Aeration, Media, and Flow Rate Effects on the Ammonia Removal Performance of a Pilot Scale Continuous Up-Flow Filter


by E. Loffill, (The Liverpool Centre for Environmental Technology, Liverpool John Moores University, The Peter Jost Centre, Byrom Street, Liverpool L3 3AF, UK), R. M. Alkhaddar, (The Liverpool Centre for Environmental Technology, Liverpool John Moores University, The Peter Jost Centre, Byrom Street, Liverpool L3 3AF, UK), D. A. Phipps, (The Liverpool Centre for Environmental Technology, Liverpool John Moores University, The Peter Jost Centre, Byrom Street, Liverpool L3 3AF, UK), and R. Y. G. Andoh, (Hydro International, Shearwater House, Clevedon Hall Estate, Victoria Road, Clevedon BS21 7RD, UK)
Section: Water, Wastewater, and Stormwater, pp. 3369-3378, (doi:  http://dx.doi.org/10.1061/41173(414)353)

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Document type: Conference Proceeding Paper
Part of: World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
Abstract: Up-flow sand filters such as the continuous up-flow filter device are primarily intended to remove suspended solids for tertiary wastewater treatment. With the addition of an aeration regimen, they can be utilised as active biofilters to achieve ammonia removal from a final effluent stream before discharge. The CUF (Continuous Up-flow Filter) described here is a moving bed system with a counter-current flow of water and sand which operates as a continuous process that has no need for a separate backwashing stage. This paper summarises the results of an investigation using a large scale pilot plant, located at a full urban wastewater treatment site in north-west England. The ammonia removal efficiency, in terms of aeration and liquid flow rates and feed characteristics has been investigated and a comparison between the removal efficiencies of different filter media has been undertaken. Attempts have been made to produce an empirical model for plant operation which is based on the parameters found to be significant for removal limitations.


ASCE Subject Headings:
Aeration
Flow rates
Ammonia
Filters