PAPER
How to cope with stricter effluent criteria UK experiences with continuously moving bed aerated bioreactors
Within the UK a large number of sewage treatment works will have to be upgraded, to meet more stringent criteria. Special attention will have to be paid to suspended solids, ammonia and BOD. The use of an aerated tertiary moving bed reactor as a add-on polishing step tends to be a good and reliable option: BOD and suspended solids are removed by physical sand filtration, while ammonia is converted biologically by nitrifying biomass, present on the sand grains.
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The described reactor type shows to be reliable for aerated biological processes after several years of operational experience.
The ATSF moving bed reactor has shown to be a reliable process unit to reach low ammonia, BOD and suspended solids levels, which are required at several municipal waste water treatment works under the European Directives.
