Structure of Microbial Communities in Activated Sludge: Potential Implications for Assessing the Biodegradability of Chemicals

Forney, Larry J.; Liu, Wen Tso; Guckert, James B.; Kumagai, Yoshiharu; Namkung, Eun Ha; Nishihara, Tsutomu; Larson, Robert J.

doi:10.1006/eesa.2001.2034

Cited by 68 publications

(62 citation statements)

References 42 publications

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“…While the microbial community structures of activated sludge have some general characteristics in common, it is reasonable to propose that pronounced differences do exist in various treatment systems (Madoni and Ghetti, 1981;Forney et al, 2001). The assumption that protozoan ecotype was somewhat associated with process principles, in terms of different configurations or regimes, was confirmed by the above results.…”

Section: Changes Of Community Structures With Various Processesmentioning

confidence: 56%

Comparative study of protozoan communities in full-scale MWTPs in Beijing related to treatment processes

Liu

Yang

et al. 2008

Water Research

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Community structure Municipal wastewater Treatment processCluster analysis Principal components analysis a b s t r a c tThe potential influence of process principles and system conditions on shaping protozoan community structures in eight full-scale municipal wastewater treatment systems in Beijing, including four process types, i.e., anaerobic/anoxic/aerobic or anoxic/anaerobic/ aerobic process (A2O), anoxic/aerobic or anaerobic/aerobic process (AO), oxidation ditch (OD) and sequencing batch reactor (SBR), was evaluated with the aid of cluster analysis and principal components analysis (PCA). The species richness and abundance distribution of protozoa varied significantly with the process types: the A2O ecosystems harbored more diverse protozoan communities with higher relative abundance of crawling and sessile ciliates than the other systems. Cluster analysis revealed that the protozoan community structures were in high coordination with the process types, i.e., different systems with the same process principles exhibited similar community structures. The A2O processes displayed a distinctively higher similarity of protozoan community structures than the AO processes, suggesting that the A2O ecosystems were more stable than those of AO. The PCA analyses demonstrated that swimming and carnivorous ciliates were correlated with poor settleability of sludge, and that amoebae were sensitive to DO level. We therefore concluded that protozoan community structures were primarily shaped by treatment process principles, whilst they were also modified by system conditions in terms of operational properties and water quality.

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Section: Changes Of Community Structures With Various Processesmentioning

confidence: 56%

Comparative study of protozoan communities in full-scale MWTPs in Beijing related to treatment processes

Liu

Yang

et al. 2008

Water Research

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“…Studies on the genetic diversity of microorganisms inhabiting sewage sludge with the use of the molecular technique of the Denaturant Gel Gradient Electrophoresis (DGGE) were conducted by numerous researchers, e.g., Hesham et al (2011), Er-ming and Wei (2011), Ding et al (2011), Liu et al (2007 and Forney et al (2001). Diversity analysis of nitrifiers community occurring WAS and AS was conducted on five terms (I-V) (Fig.…”

Section: Genetic Diversity Evaluation Of Nitrifiers' Communitymentioning

confidence: 99%

Assessment of microbiological and biochemical properties of dairy sewage sludge

Frąc

Jezierska-Tys

Oszust

et al. 2016

Int. J. Environ. Sci. Technol.

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The rational utilisation of sludge as organic matter application into the soil permits enrichment in nutrients such as nitrogen and phosphorus. As dairy sewage sludge contains large amounts of organic matter and minerals, utilisation of such sludge in agriculture appears to be a noteworthy proposal. However, such waste can also be a source of toxic substances, heavy metals, inhibitors, xenobiotics and potentially pathogenic microorganisms. Therefore, it is so important to monitor its microbiological and biochemical properties in aspect of the safety for human health, natural environment preservation and a suitable level of agricultural production maintenance. The objective of study was the estimation of selected microbiological, biochemical and chemical properties of activated sludge (AS) and waste activated sludge (WAS) originating from the dairy sewage treatment plant. Nitrification and ammonification rates, respiratory, dehydrogenases, acid phosphatase, alkaline phosphatase, protease and urease activities were at significantly higher levels in the WAS than in the AS. The pH value of the AS and WAS oscillated within the range of neutral reaction.

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“…In spite of well-studied mechanism of bacterial breakdown of nitrogen compounds, the effectiveness of this process depends also on many factors, including the eukaryotic organisms activity and first of all protozoan activity [14,[26][27][28][29][30][31]. On account of this, the process of nitrogen compounds removal (nitrification and denitrification process) as a component of general metabolic activity in bioreactors is under careful examination [8,[32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Community Composition and Abundance of Protozoa Under Different Concentration Of Nitrogen Compounds at “Hajdow” Wastewater Treatment Plant / Zbiorowiska Pierwotniaków I Ich Liczebność W Oczyszczalni Ścieków „Hajdów” Przy Różnych Stężeniach Związków Azotu

Jaromin-Gleń¹,

Babko²,

Łagód³

et al. 2013

Ecological Chemistry and Engineering S

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Abstract:The protists notably ciliates and testate amoebas in the conditions of modernized wastewater treatment plants "Hajdow" (Lublin, Poland) and the nitrogen removal efficiency were studied. Sampling took place every week during the period of August-September 2010. The total of 31 taxa of ciliates and 3 taxa of testate amoebas were identified. Most of the species were registered during the whole research period. Significant abundance reached the following species: Acineria uncinata, Aspidisca cicada, Aspidisca lynceus, Vorticella aquadulcis, Vorticella infusionum, Arcella vulgaris, Euglypha acanthophora and Pyxidicula operculata. In September increase in efficiency of nitrogen removal process was registered. The research shows that the increase of nitrogen reduction efficiency was accompanied by increase of ciliates quantity, mainly due to peritrichid ciliates.

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Structure of Microbial Communities in Activated Sludge: Potential Implications for Assessing the Biodegradability of Chemicals

Cited by 68 publications

References 42 publications

Comparative study of protozoan communities in full-scale MWTPs in Beijing related to treatment processes

Comparative study of protozoan communities in full-scale MWTPs in Beijing related to treatment processes

Assessment of microbiological and biochemical properties of dairy sewage sludge

Community Composition and Abundance of Protozoa Under Different Concentration Of Nitrogen Compounds at “Hajdow” Wastewater Treatment Plant / Zbiorowiska Pierwotniaków I Ich Liczebność W Oczyszczalni Ścieków „Hajdów” Przy Różnych Stężeniach Związków Azotu

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