Aerobic granular sludge in an SBR-system treating wastewater rich in particulate matter.
Aerobic granular sludge was successfully cultivated in a lab-scale SBR-system treating malting wastewater with a high content of particulate organic matter (0.9 gTSS/L). At an organic loading rate (CODtotal) of 3.4 kg/(m3 x d) an average removal efficiency of 50% in CODtotal and 80% in CODdissolved was achieved. Fractionation of the COD by means of particle size showed that particles with a diameter less than 25-50 microm could be removed at 80% efficiency, whereas particles bigger than 50 microm were only removed at 40% efficiency. Tracer experiments revealed a dense sessile protozoa population covering the granules. The protozoa appeared to be responsible for primary particle uptake from the wastewater.
Schwarzenbeck
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Institute of Water Quality Control and Waste Management, Technical University of Munich, Am Coulombwall, Garching, Germany. N.Schwarzenbeck@bv.tum.de
Erley
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Wilderer
P A
PA
D000818:Animals; D001420:Bacteria, Aerobic / Q000254:growth & development*; D018441:Biofilms / Q000254:growth & development*; D019149:Bioreactors; D056890:Eukaryota / Q000254:growth & development; D010316:Particle Size; D011157:Population Dynamics; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods
D012722:Sewage