Granules characteristics in the vertical profile of a full-scale upflow anaerobic sludge blanket reactor treating poultry slaughterhouse wastewater

Nery, Valéria Del; Pozzi, Eloísa; Damianovic, Márcia Helena Rissato Zamariolli; Domingues, Mércia Regina; Zaiat, Marcelo

doi:10.1016/j.biortech.2007.03.019

Cited by 55 publications

(33 citation statements)

References 26 publications

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“…Two factors often regarded relevant are OLR and HRT. Several studies have been conducted under varying ORL and HRT in reactors treating municipal and industrial wastewaters of diverse nature and operated at different temperatures [37,39,40,44,56,57]. Analyzing the diversity of the prokaryotic communities by means of different molecular approaches, most of these studies concluded that Archaea were less sensitive than bacteria to changes in ORL and HRT [37,39,44,56].…”

Section: Archaeal Communities In Anaerobic Bioreactorsmentioning

confidence: 99%

Archaeal Diversity in Biofilm Technologies Applied to Treat Urban and Industrial Wastewater: Recent Advances and Future Prospects

Calderón

González‐Martínez

Gómez-Silván

et al. 2013

IJMS

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Biological wastewater treatment (WWT) frequently relies on biofilms for the removal of anthropogenic contaminants. The use of inert carrier materials to support biofilm development is often required, although under certain operating conditions microorganisms yield structures called granules, dense aggregates of self-immobilized cells with the characteristics of biofilms maintained in suspension. Molecular techniques have been successfully applied in recent years to identify the prokaryotic communities inhabiting biofilms in WWT plants. Although methanogenic Archaea are widely acknowledged as key players for the degradation of organic matter in anaerobic bioreactors, other biotechnological functions fulfilled by Archaea are less explored, and research on their significance and potential for WWT is largely needed. In addition, the occurrence of biofilms in WWT plants can sometimes be a source of operational problems. This is the case for membrane bioreactors (MBR), an advanced technology that combines conventional biological treatment with membrane filtration, which is strongly limited by biofouling, defined as the undesirable accumulation of microbial biofilms and other materials on membrane surfaces. The prevalence and spatial distribution of archaeal communities in biofilm-based WWT as well as their role in biofouling are reviewed here, in order to illustrate the significance of this prokaryotic cellular lineage in engineered environments devoted to WWT.

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Section: Archaeal Communities In Anaerobic Bioreactorsmentioning

confidence: 99%

Archaeal Diversity in Biofilm Technologies Applied to Treat Urban and Industrial Wastewater: Recent Advances and Future Prospects

Calderón

González‐Martínez

Gómez-Silván

et al. 2013

IJMS

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“…Several anaerobic processes have been found efficient in the treatment of leachate (Castillo et al, 2007;Calli et al, 2006;Xu et al, 2008;Chen et al, 2008;Bohdziewicz and Kwarciak, 2008). Since the granular form of the sludge in anaerobic reactors has better settling property and more microorganisms to space ratio than the flocculent form (Ghangrekar et al, 2005), the formation and characteristics of the granules are drawing more attentions (Ghangrekar et al, 2005;Liu et al, 2009;Show et al, 2004;Hulshoff Pol et al, 2004;Del Nery et al, 2008), so the anaerobic granular sludge reactors are more often applied in this kind of treatment (Rao et al, 2008;Parawira et al, 2006;Chang, 2004).…”

Section: Introductionmentioning

confidence: 98%

The effect of calcium on the treatment of fresh leachate in an expanded granular sludge bed bioreactor

Liu

Zhong

et al. 2011

Bioresource Technology

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“…We suspect such organisms contribute to degrading and recycling detrital biomass [13] accumulated in the larger granules. Indeed, as granule size increases, poor substrate penetration into the inner layers leads to cell death, cell debris degradation, and development of a hollow core or inactive layer [4, 37–39]. Thus, while the observations are quite logical, the influence of such organisms on the ecology of the granules remains unclear.…”

Section: Resultsmentioning

confidence: 99%

A Single-Granule-Level Approach Reveals Ecological Heterogeneity in an Upflow Anaerobic Sludge Blanket Reactor

et al. 2016

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Upflow anaerobic sludge blanket (UASB) reactor has served as an effective process to treat industrial wastewater such as purified terephthalic acid (PTA) wastewater. For optimal UASB performance, balanced ecological interactions between syntrophs, methanogens, and fermenters are critical. However, much of the interactions remain unclear because UASB have been studied at a “macro”-level perspective of the reactor ecosystem. In reality, such reactors are composed of a suite of granules, each forming individual micro-ecosystems treating wastewater. Thus, typical approaches may be oversimplifying the complexity of the microbial ecology and granular development. To identify critical microbial interactions at both macro- and micro- level ecosystem ecology, we perform community and network analyses on 300 PTA–degrading granules from a lab-scale UASB reactor and two full-scale reactors. Based on MiSeq-based 16S rRNA gene sequencing of individual granules, different granule-types co-exist in both full-scale reactors regardless of granule size and reactor sampling depth, suggesting that distinct microbial interactions occur in different granules throughout the reactor. In addition, we identify novel networks of syntrophic metabolic interactions in different granules, perhaps caused by distinct thermodynamic conditions. Moreover, unseen methanogenic relationships (e.g. “Candidatus Aminicenantes” and Methanosaeta) are observed in UASB reactors. In total, we discover unexpected microbial interactions in granular micro-ecosystems supporting UASB ecology and treatment through a unique single-granule level approach.

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Granules characteristics in the vertical profile of a full-scale upflow anaerobic sludge blanket reactor treating poultry slaughterhouse wastewater

Cited by 55 publications

References 26 publications

Archaeal Diversity in Biofilm Technologies Applied to Treat Urban and Industrial Wastewater: Recent Advances and Future Prospects

Archaeal Diversity in Biofilm Technologies Applied to Treat Urban and Industrial Wastewater: Recent Advances and Future Prospects

The effect of calcium on the treatment of fresh leachate in an expanded granular sludge bed bioreactor

A Single-Granule-Level Approach Reveals Ecological Heterogeneity in an Upflow Anaerobic Sludge Blanket Reactor

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