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Malaysian Journal of Medical Sciences
School of Medical Sciences, Universiti Sains Malaysia
ISSN: 1394-195X
Vol. 23, No. 3, 2016, pp. 86-88
Bioline Code: mj16038
Full paper language: English
Document type: Short Communication
Document available free of charge

Malaysian Journal of Medical Sciences, Vol. 23, No. 3, 2016, pp. 86-88

 en Role of Nocardia check for this species in other resources in Activated Sludge
Bafghi, Mehdi Fatahi & Yousefi, Nader


  Activated sludge process is a biological process that is widely used in the domestic and industrial wastewater treatment in over the world. The foam formation is often reported in wastewater treatment plants which are related to this process. Some operational problems can be created by foaming, such as effluent quality deteriorates, the creation of malodorous, increased time requirements in order to plant maintenance, and in extreme cases, hazardous working conditions resulting from foam spilling out of the aeration basin and as well as increased in operational costs. There are different ways to overcome this problem, such as reduce air flows into the aeration basin, reduction in the grease and oil content of the wastewater, surface and return activated sludge (RAS) chlorination, anoxic and anaerobic selectors, solid retention time (SRT) control and antifoams and organic polymer addition. On the other hand, rapid and accurate identification of the foam causes is in the first step to control bulking and foaming. Foam problem is often created by filamentous bacteria, such as Nocardia and Gordonia check for this species in other resources species. This bacterium has a role important in activated sludge.

wastewater treatment; foaming; Filamentous bacteria; Nocardia

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