Effect of coagulant‐flocculant reagents on aerobic granular biomass

Río, Ángeles Val del; Morales, Nicolás; Figueroa, M.; Mosquera-Corral, Anuska; Campos, José Luis; Méndez, R.

doi:10.1002/jctb.3698

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The observed connection between the process performance and AOB/NOB abundance correlates well with the results published by Val del Río et al [31], who found that a sludge retention time in excess of five days is necessary to obtain a nitrification efficiency close to 100%. In our reactors, the SRT was below six days (R1) and three days (R2) during the first 10 days of operation ( Figure S6).…”

Section: Abundance Of Aob and Nobsupporting

confidence: 90%

Effects of Wash-Out Dynamics on Nitrifying Bacteria in Aerobic Granular Sludge During Start-Up at Gradually Decreased Settling Time

Szabo

Hermansson

Modin

et al. 2016

Water

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Abstract:The aerobic granular sludge process is a promising technology for the removal of nutrients and organic contaminants from wastewater. However, a large amount of the sludge is often washed out during the start-up of granular reactors, which results in reduced process performance and a protracted start-up phase. In this study, the possibility of a rapid start-up of the nitrification process through a stepwise decrease of the settling time was investigated, and the bacterial population dynamics in two lab-scale sequencing batch reactors were studied. The results demonstrated that the stepwise decrease of the settling time enabled fast granulation and rapid start-up of the process. Small cores of granules were already observed after 10 days of operation, and the biomass was dominated by granules after 28 days. The removal of organic matter and ammonium was >95% after one day and 14 days, respectively. The bacterial community composition changed rapidly during the first 21 days, resulting in strongly reduced richness and evenness. The diversity increased at a later stage, and the bacterial community continued changing, albeit at a slower pace. The rate of the stepwise decrease in settling time strongly affected the abundance of nitrifying organisms, but not the general composition of the bacterial community. The results of this study support the idea that a stepwise decrease of the settling time is a successful strategy for the rapid start-up of aerobic granular sludge reactors.

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Section: Abundance Of Aob and Nobsupporting

confidence: 90%

Effects of Wash-Out Dynamics on Nitrifying Bacteria in Aerobic Granular Sludge During Start-Up at Gradually Decreased Settling Time

Szabo

Hermansson

Modin

et al. 2016

Water

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“…It is unknown if the presence of the polyelectrolyte added to the digested sludge to improve the centrifugation efficiency, affected the granulation process. Previous research reported that the presence of coagulant-flocculant reagents involved negative effects on the formation process and the physical properties of the aerobic granules [23]. In our study, despite the presence of polyelectrolyte the granule formation progressed acceptably as shown by (i) sludge volumetric indexes and settling velocity (just discussed above), (ii) in terms of size and biomass retention capacity ( Figure 3A).…”

Section: Experimental Procedures and Type Of Operationsupporting

confidence: 70%

Efficient and automated start-up of a pilot reactor for nitritation of reject water: From batch granulation to high rate continuous operation

Torà

Moliné

Carrera

et al. 2013

Chemical Engineering Journal

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“…In this sense a short feast phase is preferable to avoid filamentous outgrowth [35]. However for R1 the feast phase was longer than in RC, which promoted the growth of filamentous organism in the granules surface, while in RC this was not observed [15].…”

Section: Effects Of Operational Conditionsmentioning

confidence: 99%

“…The details about the operation could be consulted in Val del Río et al [15] for R1, Figueroa et al [16] for R2 and Val del Río et al [17] for R3.…”

Section: Reactors Operationmentioning

confidence: 99%

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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Effect of coagulant‐flocculant reagents on aerobic granular biomass

Abstract: BACKGROUND: Technologies based on aerobic granular biomass are presented as a

Cited by 13 publications

References 31 publications

Effects of Wash-Out Dynamics on Nitrifying Bacteria in Aerobic Granular Sludge During Start-Up at Gradually Decreased Settling Time

Effects of Wash-Out Dynamics on Nitrifying Bacteria in Aerobic Granular Sludge During Start-Up at Gradually Decreased Settling Time

Efficient and automated start-up of a pilot reactor for nitritation of reject water: From batch granulation to high rate continuous operation

Filamentous bacteria existence in aerobic granular reactors

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