Limitation of Sludge Biotic Index application for control of a wastewater treatment plant working with shock organic and ammonium loadings

Drzewicki, Adam; Kulikowska, Dorota

doi:10.1016/j.ejop.2011.06.001

Cited by 23 publications

(27 citation statements)

References 25 publications

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“…Almost all the biological processes have been explored in terms of biomass composition (bacteria, protozoa, metazoan, and fungi) and activity: conventional activated sludge, attached biomass, membrane reactors, and treating either municipal [27][28][29][30][31][32][33][34] or industrial wastewater [35][36][37][38][39]. Likewise, identification and quantification of microorganisms operating under different conditions (aerobic, anoxic, and anaerobic) have been reported [25,[40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Abbà

Collivignarelli

Manenti

et al. 2017

Journal of Chemistry

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A thermophilic aerobic membrane reactor (TAMR) treating high-strength COD liquid wastes was submitted to an integrated investigation, with the aim of characterizing the biomass and its rheological behaviour. These processes are still scarcely adopted, also because the knowledge of their biology as well as of the physical-chemical properties of the sludge needs to be improved. In this paper, samples of mixed liquor were taken from a TAMR and submitted to fluorescent in situ hybridization for the identification and quantification of main bacterial groups. Measurements were also targeted at flocs features, filamentous bacteria, and microfauna, in order to characterize the sludge. The studied rheological properties were selected as they influence significantly the performances of membrane bioreactors (MBR) and, in particular, of the TAMR systems that operate under thermophilic conditions (i.e., around 50 ∘ C) with high MLSS concentrations (up to 200 gTS L −1 ). The proper description of the rheological behaviour of sludge represents a useful and fundamental aspect that allows characterizing the hydrodynamics of sludge suspension devoted to the optimization of the related processes. Therefore, in this study, the effects on the sludge rheology produced by the biomass concentration, pH, temperature, and aeration were analysed.

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Section: Introductionmentioning

confidence: 99%

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Abbà

Collivignarelli

Manenti

et al. 2017

Journal of Chemistry

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“…Another dominant peritrich ciliate was Vorticella convallaria (average percentages in total peritrich ciliates: 33.7% in System A and 31.3% in System B), which did not significantly vary with SVI levels (p > 0.05) (Table S2). A similar ciliate fauna has recently been reported from a Polish wastewater treatment plant working with shock organic and ammonium loadings (Drzewicki and Kulikowska 2011). High abundances of E. plicatilis and V. striata occurred under sludge bulking conditions, while the abundance of V. convallaria decreased moderately after a period of sludge bulking (from samples A6 and B6 in systems A and B, respectively; sampling information shown in Table S1) (Fig.…”

Section: Microfauna Species Associated With Sludge Bulkingmentioning

confidence: 86%

“…Insight into microfauna community composition is of great significance for a holistic understanding of activated sludge ecosystems. Secondly, because of the distinct relations between microfauna, the environment and the operability (Curds and Cockburn 1970;Drzewicki and Kulikowska 2011;Dubber and Gray 2011;Madoni 1994;Salvadó et al 2004), microfauna has been used as performance bioindicators for biological wastewater treatment systems (BWTSs).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of the microfauna community in a full-scale municipal wastewater treatment plant experiencing sludge bulking

et al. 2013

European Journal of Protistology

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We investigated the dynamics of the microfauna community in activated sludge, with special reference to sludge bulking, in two parallel municipal wastewater treatment systems in Beijing, China over a period of 14 months. Annual cyclic changes in microfauna community structures occurred in both systems. RELATE analysis based on Spearman's Rank correlation indicated that microfauna community structures were highly correlated with the sludge volume index (SVI) (p < 0.001), which indicates sludge settleability. Nutrient conditions of raw sewage (p < 0.01) and hydraulic retention time (HRT) (p < 0.05) were also related to microfauna community structures. Abundances of the species Epistylis plicatilis and Vorticella striata increased significantly with an increase in SVI (p < 0.001) and decrease in water temperature (p < 0.001), suggesting that sludge bulking may have created favorable conditions for the two species, even under unfavorable temperature conditions. Sludge de-flocculation primarily due to the excessive growth of Microthrix parvicella-like filaments could be an important driving force for the microfauna community changes. The release of flocculated non-filamentous bacteria may represent a suitable food source for these species. The two species may be considered as potential bioindicators for sludge bulking.

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“…Table 3 Frequency of occurrence and abundance of protozoa and small metazoa during the study; n -number of samples; ± -standard deviation; P -probability of H0 (series 1 -wastewater treatment, series 2 -wastewater with flowback water treatment) Observed microfauna consisted of taxa belonging to positive keygroups [11]. The predominance of shelled amoeba, crawling ciliates and attached ciliates with wide peristomes and the fact that tardigrades and rotifers were commonly found both indicated a healthy, low-loaded, sufficiently aerated and well-flocculated activated sludge that would produce high quality effluent [21][22][23][24][25][26]. The sludge biotic index (SBI), calculated on the basis of the microfauna composition in samples, was always the highest value possible (10/10).…”

Section: Microfauna Communitymentioning

confidence: 99%

Impact of Flowback Water on Activated Sludge Biocenosis During Municipal Wastewater Treatment

Ziembińska-Buczyńska

Drzewicki

Kulikowska

2015

Ecological Chemistry and Engineering S

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Abstract:The aim of this study was to determine the effect of flowback water on an activated sludge biocenosis during municipal wastewater treatment in the sequencing batch reactors (SBRs). Two series were performed. In series 1, only municipal wastewater was treated, whereas in series 2, municipal wastewater with pre-treated flowback water was used. Flowback water constituted 3-5% of the influent and was introduced to the SBRs twice per week. Introducing flowback water did not decrease the quality of effluent from the SBRs. However, the composition of the activated sludge biocenosis differed between series, ie the biodiversity of protozoa and the relative abundance of microfauna in functional groups changed after flowback water addition. Polymerase chain reaction -denaturing gradient gel electrophoresis (PCR-DGGE) showed that the ammonia oxidizers community responded faster to flowback water addition than the total bacterial community and remained relatively stable during treatment. However, after 9 weeks of exposure to flowback water, ammonia oxidizing bacteria (AOB) biodiversity decreased. This suggests that prolonged exposure could cause nitrification problems, leading to deterioration in effluent quality.

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Limitation of Sludge Biotic Index application for control of a wastewater treatment plant working with shock organic and ammonium loadings

Cited by 23 publications

References 25 publications

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Dynamics of the microfauna community in a full-scale municipal wastewater treatment plant experiencing sludge bulking

Impact of Flowback Water on Activated Sludge Biocenosis During Municipal Wastewater Treatment

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