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Wastewater treatment in a hybrid activated sludge baffled reactor.

Abstract : A novel hybrid activated sludge baffled reactor (HASBR), which contained both suspended and attached-growth biomass perfect mixing cells in series, was developed by installing standing and hanging baffles and introducing plastic brushes into a conventional activated sludge (CAS) reactor. It was used for the treatment of domestic wastewater. The effects on the operational performance of developing the suspended and attached-growth biomass and reactor configuration were investigated. The change of the flow regime from complete-mix to plug-flow, and the addition of plastic brushes as a support for biofilm, resulted in considerable improvements in the COD, nitrogen removal efficiency of domestic wastewater and sludge settling properties. In steady state, approximately 98+/-2% of the total COD and 98+/-2% of the ammonia of the influent were removed in the HASBR, when the influent wastewater concentration was 593+/-11 mg COD/L and 43+/-5 mg N/L, respectively, at a HRT of 10 h. These results were 93+/-3 and 6+/-3% for the CAS reactor, respectively. Approximately 90+/-7% of the total COD was removed in the HASBR, when the influent wastewater concentration was 654+/-16 mg COD/L at a 3h HRT, and in the organic loading rate (OLR) of 5.36kgCOD m(-3) day(-1). The result for the CAS reactor was 60+/-3%. Existing CAS plants can be upgraded by changing the reactor configuration and introducing biofilm support media into the aeration tank.
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https://hal-unilim.archives-ouvertes.fr/hal-00653575
Contributeur : Françoise Merigaud <>
Soumis le : lundi 19 décembre 2011 - 17:11:07
Dernière modification le : lundi 24 septembre 2018 - 09:42:16

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Mostafa Tizghadam, Christophe Dagot, Michel Baudu. Wastewater treatment in a hybrid activated sludge baffled reactor.. Journal of Hazardous Materials, Elsevier, 2008, 154 (1-3), pp.550-7. ⟨10.1016/j.jhazmat.2007.10.092⟩. ⟨hal-00653575⟩

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