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|Title:||Performance Evaluation of the Biological Aerated Filter|
|Keywords:||performance evaluation;biological aerated filter;wastewater treatment;sewage|
|Abstract:||<p> The Biological Aerated Filter is a novel biological wastewater treatrrent process consisting of.an activated sludge zone followed by an unstratified sand filter for solids separation. Three evaluation studies of the BAF to date have yielded results indicating low solids production or possibly total oxidation. On the basis of these studies, Tymflo Process Limited, the patent holding corrpany, clairred up to 50% cost savings for wastewater.treabrent as there would be no excess biological solids produced, and therefore no sludge disposal costs. The object of this report was to evaluate the BAF capabilities to treat degritted municipal sewage with respect to the above claims. Two pilot scale BAF units were operated at the Canada Centre for Inland Waters continuously for 97 days treating degritted Burlington Skyway sewage at various operating conditions. The conclusions of the tests are that the BAF cannot be operated as a total solids retention system treating degritted nnmicipal sewage on a 24 hour cycle at a 12 hour hydraulic detention ti.Ile. The inert fraction of the influent is retained in the system resulting in high mixed liquor concentrations which overload the filter thereby decreasing treatrrent tine. The system is capable of 88% CDD rerroval, essentially corrplete nitrification and 97% SS rerroval. The system yields are in the order of 0.24 gm MLVSS/grn COD rercoved at organic loadings of approximately 0.08 gm COD removed/gm MLVSS day. </p>|
|Appears in Collections:||Open Access Dissertations and Theses|
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