Peer-Reviewed Journal Details
Mandatory Fields
O'Reilly, E., Rodgers, M., Clifford, E.
Water Science And Technology
Operation of a full-scale pumped flow biofilm reactor (PFBR) under two aeration regimes
Optional Fields
attached growth; decentralised wastewater treatment; low energy requirement; nitrification; pumped flow biofilm reactor
A novel technology suitable for centralised and decentralised wastewater treatment has been developed, extensively tested at laboratory-scale, and trialled at a number of sites for populations ranging from 15 to 400 population equivalents (PE). The two-reactor-tank pumped flow biofilm reactor (PFBR) is characterised by: (i) its simple construction; (ii) its ease of operation and maintenance; (iii) low operating costs; (iv) low sludge production; and (v) comprising no moving parts or compressors, other than hydraulic pumps. By operating the system in a sequencing batch biofilm reactor (SBBR) mode, the following treatment can be achieved: 5-day biochemical oxygen demand (BOD5), chemical oxygen demand (COD) and total suspended solids (TSS) reduction; nitrification and denitrification. During a 100-day full-scale plant study treating municipal wastewater and operating at 165 PE and 200 PE (Experiments 1 and 2, respectively), maximum average removals of 94% BOD5, 86% TSS and 80% ammonium-nitrogen (NH4-N) were achieved. During the latter part of Experiment 2, effluent concentrations averaged: 14 mg BOD5/l; 32 mg CODfiltered/l; 14 mg TSS/l; 4.4 mg NH4-N/l; and 4.0 mg NO3-N/l (nitrate-nitrogen). The average energy consumption was 0.46-0.63 kWh/m(treated)(3) or 1.25-1.76 kWh/kg BOD5 (removed). No maintenance was required during these experiments. The PFBR technology offers a low energy, minimal maintenance technology for the treatment of municipal wastewater.
DOI 10.2166/wst.2011.653
Grant Details
Enterprise Ireland (EI), Environmental Protection Agency (EPA), Other Government
Publication Themes
Environment, Marine and Energy, Informatics, Physical and Computational Sciences