Concerning the role of cell lysis-cryptic growth in anaerobic side-stream reactors: The single-cell analysis of viable, dead and lysed bacteria

Foladori, P.; Velho, Viviane Furtado; Costa, Rejane Helena Ribeiro da; Bruni, Luigino; Quaranta, A.; Andreottola, Gianni

doi:10.1016/j.watres.2015.01.042

Cited by 69 publications

(26 citation statements)

References 30 publications

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“…Same finding was described in Meng et al [13]. One reason for the enhancement of TN removal process is that application of ultrasonication supplies an extra carbonaceous source with high denitrification rate [21]. Increasing the intensity of ultrasonication at US2 resulted in a decrease of TN removal rate, being at any case over 30% but with marked decreasing trend.…”

Section: E Total Nitrogen (Tn) Removalsupporting

confidence: 76%

“…When the pilot plant was operating with combining system, this rate increased to 47.28% ±6.64 during US1 stage. OSA process has been reported to improve TN removal [1]- [21], but previous research carried out with the same pilot plant operating only OSA process [8], had lower TN removal rate (38.02%) that in combining system of the present study. Same finding was described in Meng et al [13].…”

Section: E Total Nitrogen (Tn) Removalcontrasting

confidence: 52%

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Sludge Reduction and General Performance in a Combined US+OSA System

Romero-Pareja¹,

Aragon-Cruz²,

Quiroga-Alonso³

et al. 2017

IJESD

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Abstract-The reduction of sewage sludge generated in wastewater treatment plants is one topic of interest due to the high cost related to the management of this waste and the rising amount of volume at which sludge is produced worldwide. Within the techniques to reduce sludge, the Oxic-Settling-Anaerobic (OSA) process is one of the most promising due to its simplicity and to the absence of negative consequences for system. In the OSA process the recycled sludge is submitted to an anaerobic stage prior to flow again into the biological reactor. In this study, OSA process is run in a lab scale pilot plant together with a lysis step by ultrasound treatment, applied daily to a certain fraction of the total sludge of the system previously to the anaerobic holding tank. Results point to an enhancement of sludge reduction rate for the two sonication applied regimes (45.72% and 78.56%). Also the TN removal rate increases from 21.95% during control stage to 47.28% during the first of the two ultrasound regimes applied (US1). A too intense sonication treatment during the second synergic stage (US2) is reported to lead to a serious damage of system. Increases of dehydrogenase activity were described during both stages.

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Section: E Total Nitrogen (Tn) Removalsupporting

confidence: 76%

Section: E Total Nitrogen (Tn) Removalcontrasting

confidence: 52%

Sludge Reduction and General Performance in a Combined US+OSA System

Romero-Pareja¹,

Aragon-Cruz²,

Quiroga-Alonso³

et al. 2017

IJESD

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show abstract

“…This may be explained by the fact that it was difficult for the organic material to move into the biofilm and be adsorbed by cells with an increase in EPS, as mass transfer into a biofilm is driven by diffusion (Sheng and Liu, 2011). In addition, the death and lysis of bacteria (a source of HS) might cause the release of a comparable amount of organic material that may be utilized by living bacteria (Foladori et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…Apoptosis benefits the subpopulation of living cells, which undergo continued differentiation and dispersal in a biofilm (Webb et al, 2003). The equally important role of cell lysis, which causes the release of soluble organic materials, has been demonstrated by Foladori et al (2015). In addition, the dual role of stress indication through the activation of cellular stress responses and defense mechanisms is assumed by ROS.…”

Section: Role Of Bacteria In Eps Secretion Of Biofilms In the Presencmentioning

confidence: 99%

Effects of CeO2 nanoparticles on production and physicochemical characteristics of extracellular polymeric substances in biofilms in sequencing batch biofilm reactor

You

Hou

et al. 2015

Bioresource Technology

105

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“…These studies indicate that VS reduction, upon aerobic (worm) treatment, is related to the degradation of solids-bound enzymes. Secondly, Foladori et al [28] used flow cell cytometry to show that bacterial decay is a crucial factor in VS reduction during aerobic treatment of WAS. These findings indicate that the decay of bacteria, which in fact are enzyme producers, will lead to a reduction in enzymatic activity.…”

Section: Mixed Liquor Sludgementioning

confidence: 99%