Aerobic granules cultivated and operated in continuous-flow bioreactor under particle-size selective pressure

Liu, Hongbo; Xiao, Hang; Huang, Shuxia; Ma, Huijun; Liu, He

doi:10.1016/j.jes.2014.09.004

Cited by 22 publications

(7 citation statements)

References 15 publications

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“…The size of the granules was measured by a high speed image analyses sensor (Sympatec Qicpic) that provided the particle size distribution and the granulometric curve. The granulation rate was evaluated as the percentage of particles with diameters over 600 mm in accordance with Liu et al (2014).…”

Section: Methodsmentioning

confidence: 99%

Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

Corsino

Capodici

Torregrossa

et al. 2016

Journal of Environmental Management

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Section: Methodsmentioning

confidence: 99%

Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

Corsino

Capodici

Torregrossa

et al. 2016

Journal of Environmental Management

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“…Selective pressures for growth of heterotrophic granules (Figdore et al, 2017) include 1) a short settling time to favor capture of fastsettling biomass/granules, 2) high food/mass ratio (F/M) feeding conditions with readily biodegradable substrate, and 3) sufficient shear to form the smooth and compact granular biofilm with little outgrowth. Liu et al (2014) showed that particle-size based selection by sieving MLSS and returning only the larger solids, as done in this study, selected for granules in absence of settling pressure. The 10-min unaerated feeding period in this study provided an instantaneous high F/M feeding condition.…”

Section: Discussionmentioning

confidence: 63%

“…This decoupling of SRTs is possible due to the larger size and more compact morphology for the granules. Separation of granules from flocs has been done using hydrocyclones (Shi et al, 2016) and screens (Liu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Bioaugmentation with Nitrifying Granules in Low‐SRT Flocculent Activated Sludge at Low Temperature

Figdore

Winkler²,

Stensel³

2018

Water Environment Research

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Nitrifying granules were grown in a sidestream reactor fed municipal anaerobic digestion centrate and added in an initial slug dose and subsequent smaller daily doses to a non-nitrifying mainstream activated sludge system at 12 °C and 2.5-day aerobic solids retention time (SRT) to increase its nitrification capacity. Effluent NH3-N concentrations less than 1 mg/L were achieved with bioaugmentation, and nitrification was immediately lost when granules were removed after 30 days of bioaugmentation. Molecular microbial analyses indicated that nitrifying organisms remained attached to granules in the mainstream system with little loss to the flocculent sludge. Maximum specific nitrification activity of the bioaugmented granules decreased in mainstream treatment but the nitrification capacity remained due to new granule growth in the mainstream. This study demonstrated that bioaugmentation with sidestream nitrifying granules can intensify nitrification capacity in low-SRT, low-temperature flocculent activated sludge systems to achieve low effluent NH3-N concentrations and nitrogen removal.

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“…Granular biomass selection based on particle size can be promoted through the implementation of different types of membranes [66,68], although it has been concluded that the enrichment of granular biomass in continuous flow aerobic granular systems using size as the selection procedure is not the most efficient way of keeping the granules in the reactor [49]. Thus, granular selection based on the settling velocity can be regarded as the most appropriate procedure for developing stable and efficient CFR systems.…”

Section: Physicochemical Parameters and Granular Formation In Cfr Systemsmentioning

confidence: 99%

New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

Rosa-Masegosa

Muñoz-Palazon

González‐Martínez

et al. 2021

Water

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Aerobic granular sludge (AGS) comprises an aggregation of microbial cells in a tridimensional matrix, which is able to remove carbon, nitrogen and phosphorous as well as other pollutants in a single bioreactor under the same operational conditions. During the past decades, the feasibility of implementing AGS in wastewater treatment plants (WWTPs) for treating sewage using fundamentally sequential batch reactors (SBRs) has been studied. However, granular sludge technology using SBRs has several disadvantages. For instance, it can present certain drawbacks for the treatment of high flow rates; furthermore, the quantity of retained biomass is limited by volume exchange. Therefore, the development of continuous flow reactors (CFRs) has come to be regarded as a more competitive option. This is why numerous investigations have been undertaken in recent years in search of different designs of CFR systems that would enable the effective treatment of urban and industrial wastewater, keeping the stability of granular biomass. However, despite these efforts, satisfactory results have yet to be achieved. Consequently, it remains necessary to carry out new technical approaches that would provide more effective and efficient AGS-CFR systems. In particular, it is imperative to develop continuous flow granular systems that can both retain granular biomass and efficiently treat wastewater, obviously with low construction, maintenance and exploitation cost. In this review, we collect the most recent information on different technological approaches aimed at establishing AGS-CFR systems, making possible their upscaling to real plant conditions. We discuss the advantages and disadvantages of these proposals and suggest future trends in the application of aerobic granular systems. Accordingly, we analyze the most significant technical and biological implications of this innovative technology.

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Aerobic granules cultivated and operated in continuous-flow bioreactor under particle-size selective pressure

Cited by 22 publications

References 15 publications

Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

Bioaugmentation with Nitrifying Granules in Low‐SRT Flocculent Activated Sludge at Low Temperature

New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

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