Trends in the use of protozoa in the assessment of wastewater treatment

Nicolau, Ana; Dias, Nicolina; Мота, М.; Lima, Nelson

doi:10.1016/s0923-2508(01)01241-4

Cited by 79 publications

(46 citation statements)

References 40 publications

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“…Several studies on fungi and protozoa in activated sludge systems demonstrated that these eukaryotic organisms fulfil different tasks in wastewater systems, related to sludge dewaterability and toxic resistance, COD removal, nitrification or denitrification activities [28,29]. However in the present study they were only present when the fish processing wastewater was fed indicating their possible presence in the inoculum or in this kind of effluent.…”

Section: Inoculum and Wastewater Compositioncontrasting

confidence: 47%

Filamentous bacteria existence in aerobic granular reactors

Figueroa

Río

Campos

et al. 2014

Bioprocess Biosyst Eng

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Filamentous bacteria are associated to biomass settling problems in wastewater treatment plants. In systems based on aerobic granular biomass they have been proposed to contribute to the initial biomass aggregation process. However their development on mature aerobic granular systems has not been sufficiently studied. In the present research work filamentous bacteria were studied for the first time after long term operation (up to 300 days) of aerobic granular systems. Chloroflexi and Sphaerotilus natans have been observed in a reactor fed with synthetic wastewater. These filamentous bacteria could only come from the inoculated sludge. Thiothrix and Chloroflexi bacteria were observed in aerobic granular biomass treating wastewater from a fish canning industry. Meganema perideroedes was detected in a reactor treating wastewater from a plant processing marine products. As a conclusion the source of filamentous bacteria in these mature aerobic granular systems fed with industrial effluents was the incoming wastewater.

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Section: Inoculum and Wastewater Compositioncontrasting

confidence: 47%

Filamentous bacteria existence in aerobic granular reactors

Figueroa

Río

Campos

et al. 2014

Bioprocess Biosyst Eng

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“…It is accepted that the protozoan communities will be influenced in two pathways: to be manipulated directly by virtue of their inherent sensitivities to environment, and meanwhile to be modified indirectly in accordance with the potential changes of bacterial community structures through food chain (Curds and Cockburn, 1970;Zarda et al, 1998;Jezbera et al, 2005;Nicolau et al, 2005). For building the species-habitat relationship, most previous studies have been devoted to monitoring protozoan communities for predicting effluent quality and plant performance (Curds and Cockburn, 1970;Poole, 1984;Al-Shahwani and Horan, 1991;Salvadó et al, 1995;Martín-Cereceda et al, 1996).The species of protozoa present in activated sludge have been well inventoried as important bio-indicators since last century (Curds and Cockburn, 1970;Madoni and Ghetti, 1981;Madoni et al, 1993;Nicolau et al, 2001). Recently, with the awareness of their potential indications for operating conditions, some researchers have focused on evaluating the association of protozoan species with operational parameters (Esteban et al, 1991;Salvadó and Gracia, 1993;Salvadó , 1994;Martín-Cereceda et al, 1996;Lee et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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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“…Unlike water quality measurements, which only provide an instantaneous assessment of lake conditions, protozoa community can be used to identity past disturbances and toxic effects that are not readily detected by chemical means (Cairns and McCormick, 1993). Many studies have focused on the significance of protozoa in biological wastewater treatment Bharati et al, 2001;Nicolau et al, 2001;Scholz et al, 2002;wang et al, 2004;Lee et al, 2004;Madoni and Zangrossi, 2005).…”

Section: Introductionmentioning

confidence: 99%

Development of the microbial communities in lake donghu in relation to water quality

Jiang

Shen

2006

Environ Monit Assess

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There is increasing recognition that protozoa is very useful in monitoring and evaluating water ecological healthy and quality. In order to study the relationship between structure and function of protozoan communities and water qualities, six sampling stations were set on Lake Donghu, a hypereutrophic subtropical Chinese lake. Microbial communities and protists sampling from the six stations was conducted by PFU (Polyurethane foam unit) method. Species number (S), diversity index (DI), percentage of phytomastigophra, community pollution value (CPV), community similarity and heterophy index (HI) were mensurated. The measured indicators of water quality included total phosphorus (TP), dissolved oxygen (DO), Chemical oxygen demand (COD), NH 4 + , NO 2 − and NO 3 − . Every month water samples from stations I, II, III, IV were chemically analyzed for a whole year, Among the chemically analyzed stations, station I was the most heavily polluted, station II was the next, stations III and IV had similar pollution degrees. The variable tendencies of COD, TP, NH 3 , NO 2 − , NO 3 − , and DO during the year was approximately coincident among the six stations. Analysis from the community parameters showed that the pollution of station 0 was much more serious than others, and station V was the most slight. Of the community parameters, CPV and HI were sensitive in reflecting the variables of the water quality. Community similarity index was also sensitive in dividing water qualities and the water quality status of different stations could be correctly classified by the cluster analysis. DI could reflect the tendency of water quality gradient, species number and percentage of Phytomastigophora was not obvious in indicating the water quality gradient.

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Trends in the use of protozoa in the assessment of wastewater treatment

Cited by 79 publications

References 40 publications

Filamentous bacteria existence in aerobic granular reactors

Filamentous bacteria existence in aerobic granular reactors

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

Development of the microbial communities in lake donghu in relation to water quality

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