Thermophilic aerobic wastewater treatment,process performance,biomass characteristics,and effluent quality |
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Authors: | Suvilampi J Rintala J |
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Institution: | 1.Department of Biological and Environmental Science, University of Jyv?skyl?, P.O. Box 35, FIN-40014, Jyv?skyl?, Finland ; |
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Abstract: | Thermophilic aerobic wastewater treatment is reviewed. Thermophilic processes have been studied in laboratory and pilot-scale
while full-scale applications are rare. The paper focuses on the microbiology of aerobic thermophiles, performance of the
aerobic wastewater treatments, sludge yield, and alternatives to enhance performance of thethermophilic process. Thermophilic
processes have been shown to operate under markedly high loading rates (30–180 kg COD m−3d−1).Reported sludge production values under thermophilic conditions vary between 0.05 and0.3 kg SS kg CODremoved, which are about the same or lower than generally obtained in mesophilic processes. Compared to analogous mesophilic treatment,
thermophilic treatment commonly suffers from poorer effluent quality, measured by lower total COD and filtrated (GF-A) COD
removals. However, in the removal of soluble (bacterial membrane filtered) COD both mesophilic and thermophilic treatments
have produced similar results. Sludge settle ability in thermophilic processes have been reported to be better or poorer than
in analogous mesophilic processes, although cases with better settling properties are rare. Combining thermophilic with mesophilic
treatment or ultrafiltration may in some cases markedly improve effluent quality.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | aerobic wastewater treatment process efficiency thermophilic |
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