Foaming in activated sludge plants: A survey in Queensland, Australia and an evaluation of some control strategies
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Study towards understanding foaming and foam stability in urban lakes
2022, Journal of Environmental ManagementCitation Excerpt :Filamentous bacteria, observed through microscopy techniques, had been associated with foaming in wastewater treatment plants. These filamentous bacteria identified in treatment plant foams were Rhodococcus spp., Nocardia amarae, Nocardia pinensis, Nocardia asteroides, Nocardia caviae, and Microthrix parvicella (Blackall et al., 1991; Hwang and Tanaka, 1998; Liu et al., 2018; Madoni et al., 2000; Seviour et al., 1990). These studies have shown that bacteria (or any moderately hydrophobic particle) selectively partition out to the foam phase.
Insights into the potential application of magnetic field in controlling sludge bulking and foaming: A review
2022, Bioresource TechnologyThe ratio of metabolically active versus total Mycolata populations triggers foaming in a membrane bioreactor
2016, Water ResearchCitation Excerpt :Several previous works have evaluated and discussed the influence of SRT on foaming incidence in WWTPs. The general consensus is that foaming is favored by long SRTs (Jenkins et al., 2004; de los Reyes, 2010a); however, many studies failed to link consistently this operation parameter to foaming occurrence (Dhaliwal, 1979; Blackall et al., 1991; Oerther et al., 2001; Parada-Albarracín et al., 2012). Using qPCR, Asvapathanagul et al. (2012) concluded that short-term increases of SRT promoted the abundance of G. amarae.
Population dynamics of filamentous bacteria in Danish wastewater treatment plants with nutrient removal
2012, Water ResearchCitation Excerpt :Relatively few filamentous bacteria constituted the vast majority of the core species present in all plants: Microthrix, Chloroflexi type 0092 and 0803, TM7-related filaments, Streptococcus sp. and H. hydrossis. Some of these have also been identified as common and abundant as determined by morphotypes in various surveys (e.g. Blackall et al., 1999; Madoni et al., 2000; Elkelboom and Geurkink, 2002). It is, however, very difficult to compare these studies with the present FISH investigation, partly because most morphotypes cover over a significant phylogenetic diversity, and partly because some filamentous species tend to hide inside the flocs where they were rarely identified in earlier surveys using conventional microscopy.