Studies on bacterial activities in aerobic and anaerobic waste water purification

Adamse, A. D.; Deinema, M.H.; Zehnder, A.J.B.

doi:10.1007/bf02386232

Cited by 16 publications

(4 citation statements)

References 35 publications

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“…In this case, the extracellular soluble phosphate increased from 0.42 to 1.20 mmol/liter, with an initial release rate of 0.15 mmol of Pi per h per g (dry weight) of sludge during the anaerobic phase, and subsequent aerobic treatment resulted in removal of 85% of the soluble phosphate. The P1 release rate in the laboratory sludge was similar to those of other anaerobic-aerobic systems reported elsewhere (17,20) and was considerably higher than those recorded for pure Acinetobacter cultures (1,10,19) and other bacteria (23).…”

Section: Resultssupporting

confidence: 84%

Characterization of the bacterial population structure in an anaerobic-aerobic activated sludge system on the basis of respiratory quinone profiles

Hiraishi¹,

Masamune²,

Kitamura³

1989

Appl Environ Microbiol

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Bacterial respiratory quinones were used as biomarkers for studying the bacterial population structure, especially the content of Acinetobacter species, in a laboratory-scale anaerobic-aerobic activated sludge system and in the standard aerobic system. All tested sludges contained both ubiquinone and menaquinone, with a molar ratio of about 1:0.5. High-performance liquid chromatography showed that ubiquinone with eight isoprene units (Q-8) was present as the predominant ubiquinone, Q-10 was the second most common type, and Q-9 and other homologs were minor components in the anaerobic-aerobic sludge and the standard aerobic sludge. Bacteriological examination indicated that, in both sludge systems, Q-8-containing bacteria constituted a large proportion of the aerobic heterotrophic bacterial flora, but only a few strains with Q-9 were found. These findings demonstrate that the population of Acinetobacter species, which contain Q-9 as the major quinone, is negligible in those environments. The present results suggest that the introduction of anaerobic conditions into the aerobic batch process has little influence on the bacterial community structure.

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Section: Resultssupporting

confidence: 84%

Characterization of the bacterial population structure in an anaerobic-aerobic activated sludge system on the basis of respiratory quinone profiles

Hiraishi¹,

Masamune²,

Kitamura³

1989

Appl Environ Microbiol

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“…1 Most of the microorganisms present in the community are bacteria, but other organisms such as cyanobacteria, fungi, yeasts, algae, and ciliates may play important roles. 2 The microflora utilize organic matter and transform it by means of aerobic metabolism into new microbial biomass, carbon dioxide, water, and minerals. Heukelekian and SchulhofP distinguished two processes in the activated sludge system, i.e., those of oxidation and those of floe formation, and suggested that different microorganisms are involved in each of these processes.…”

Section: The Activated Sludge Processmentioning

confidence: 99%

The role of waste activated sludge and bacteria in metal‐ion removal from solution

Kasan

1993

Critical Reviews in Environmental Science and Technology

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“…Although it is accepted that microorganisms are directly responsible for the effectiveness and success of the activated sludge treatment process, the complexity of microbiological populations is often underestimated during design of the latter. Full understanding of the ecological, physiological and biochemical activities of the microflora is necessary for optimal control of the process 4 …”

Section: Introductionmentioning

confidence: 99%

“…Full understanding of the ecological, physiological and biochemical activities of the microflora is necessary for optimal control of the process. 4 Wastewater with their high organic content is a suitable medium for a large number of microorganisms including some species of fungi. 5 The main aim of the study was to isolate and identify the fungi present in activated sludge plants with membrane bioreactors (MBRs) under different conditions.…”

Section: Introductionmentioning

confidence: 99%

Mycological survey of activated sludge in MBRs

Awad

Kraume

2011

Mycoses

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The objective of this research was to conduct a survey of fungi in activated sludge plants with membrane bioreactors (MBRs). Thirty-six samples of both aerobic and anoxic activated sludge were taken from two plants with MBRs treating domestic wastewater. Over a period of 8 months, two samples from each plant were taken per month. The samples were prepared for count and identification of fungi. The obtained data show that 61 species belonging to 30 genera were identified from activated sludge samples, under aerobic conditions (27 genera and 54 species) and anoxic conditions (21 genera and 39 species), by culturing at 30 °C for 15 days. In aerobic activated sludge samples, the prevalence of Geotrichum candidum was 100% followed by Fusarium (72.2%), yeast (61.1%), Aspergillus (50.0%), Penicillium (50.0%) and Trichoderma (41.6%), while in anoxic activated sludge, G. candidum (94.4%), Fusarium (91.6%), Aspergillus (77.7%), yeast (63.8%), Penicillium (50.0%) and Trichoderma (50.0%) species were the most prevalent. In addition, the other genera found included Chaetomum, Chrysosporium, Cladosporium, Doratomyces, Gibberella, Gliocladium, Gymnoascus, Mucor, Paecilomyces, Phialophora, Rhizopus, Scopulariopsis, Stachybotrys, Stemphylium and others. The results indicate that aerobic and anoxic activated sludge provides a suitable habitat for the growth and sporulation of different groups of fungi, both saprophytic and pathogenic.

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Studies on bacterial activities in aerobic and anaerobic waste water purification

Cited by 16 publications

References 35 publications

Characterization of the bacterial population structure in an anaerobic-aerobic activated sludge system on the basis of respiratory quinone profiles

Characterization of the bacterial population structure in an anaerobic-aerobic activated sludge system on the basis of respiratory quinone profiles

The role of waste activated sludge and bacteria in metal‐ion removal from solution

Mycological survey of activated sludge in MBRs

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