Effect of increasing organic loading rates on the performance of moving-bed biofilm reactors filled with different support media: Assessing the activity of suspended and attached biomass fractions

Bassin, João Paulo; Dias, Isabelli N.; Cao, S.M.S.; Senra, Elaine M.; Laranjeira, Y.; Dezotti, Márcia

doi:10.1016/j.psep.2016.01.007

Cited by 105 publications

(55 citation statements)

References 34 publications

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“…The attachment will occurs most readily in rougher, hydrophobic and coated by surface-conditioning films [23]. Moreover, this phenomena has been demonstrated by several authors [24,25]two moving-bed biofilm reactors (MBBR1 and MBBR2 , who found a direct relationship between the cell adhesion with the surface properties. On the other hand, the materials evaluated, particularly the m-LDPE could be compared with other materials as polypropylene, which could attach 1.35 g m -2 of SSV [20].…”

Section: Biomass Growingmentioning

confidence: 97%

“…Bassin [24]two moving-bed biofilm reactors (MBBR1 and MBBR2, stipulate that the use of conventional support materials in biofilm reactors in moving bed, with organic load from 0.8 to 3.2 kg COD m -3 d -1 , increased the concentration of biomass in the carrier material. According to Hadjiev [26], they analyzed new results of fibrous materials which could be suitable for the packing of the aerobic fixed bed reactor (AFBR), especially since they provide a high specific surface for microbial fixation.…”

Section: Organic Matter Removalmentioning

confidence: 99%

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Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Espinoza

Fernandez

Pérez

et al. 2019

Rev. Téc. Ing. Univ. Zulia.

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Section: Biomass Growingmentioning

confidence: 97%

Section: Organic Matter Removalmentioning

confidence: 99%

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Espinoza

Fernandez

Pérez

et al. 2019

Rev. Téc. Ing. Univ. Zulia.

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“…In bioreactors, a switch in the substrate feeding scheme employed could then elicit changes in community structure and function. Such perturbations can occur in the form of organic shocks within activated sludge [23][24][25] and anaerobic reactor systems [26,27]. In wastewater treatment, the food-to-biomass ratio (F:M) or sludge loading rate is an important parameter as it determines the growth type and settleability of sludge microorganisms [28].…”

Section: Introductionmentioning

confidence: 99%

Sustained organic loading disturbance favors nitrite accumulation in bioreactors with variable resistance, recovery and resilience of nitrification and nitrifiers

Santillan

Phua

Constancias

et al. 2019

Preprint

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15Sustained perturbations are relevant for environmental biotechnology as they can lead systems to 16 alternative stable states that may not be reversible. Studies assessing these concerns are scarce as 17 robust replication is required. Here, we tested the effect of sustained organic loading variations (food-18 to-biomass ratio, F:M; carbon-to-nitrogen ratio, C:N) on both structure and function of activated 19 sludge bacterial communities, focusing on nitrification and nitrifiers. Two sets of replicate 5-liter 20 sequencing batch reactors were operated at two different, low (n=4) and high (n=3), F:M (0.19-0.36 21 mgCOD/mgTSS/d) and C:N (3.5-6.3 mgCOD/mgTKN) conditions for a period of 74 days, following 22 53 days of sludge acclimation. The inoculum was taken from a full-scale treatment plant. Resilience 23 was tested during the last 14 days by operating all seven reactors at low F:M-C:N. Samples were 24 analyzed using metagenomics, 16S rRNA gene amplicon sequencing, and effluent characterization. 25

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“…In 2009 there were more than 600 MBBRs operating in 50 countries [3]. The utilization of attached instead of suspended biomass benefits a very compact reactors and easier separation of the bio-solids from the treated effluent [4]. The moving bed biofilm reactor (MBBR) is a growing biofilm technology which has acquire considerable attention in the wastewater treatment in the last 20 years [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of slow biodegradable substrate addition on biofilm structure and reactor performance in two MBBRs filled with different support media

Ashrafi

Allahyari

Torresi

et al. 2019

Environmental Technology

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In this study, two moving-bed biofilm reactors (MBBR1 and MBBR2) filled with different size of carrier media (Kaldnes K1 and Kaldnes K1 micro, respectively) were subjected to soluble (sugar and sodium acetate (Ac)) substrate and mixture of soluble and particulate (particulate potato starch (PS)) substrate in a very high organic loading rate (12 kgCOD/m 3 •d) at different temperatures (26 and 15˚C, in MBBR1 and MBBR2, respectively). The effects of carrier type and substrate on biofilm structure and reactor performance have been studied. Starch was removed by adsorption at the biofilm surface and hydrolyzed which caused substrate gradient in MBBR1, however, hydrolyzed uniformly within biofilm in MBBR2. The biofilm of MBBR1 was irregular due to filamentous structure growth due to the substrate gradient, while, it was regular in MBBR2 due to uniform distribution of substrate. The performance of both MBBRs in ammonium, COD and TN removal decreased significantly when the amount of small particles in the reactor increased owing to feeding by starch, which led to biomass density decline. The type of media affected the quantity and distribution of attached biomass, which in turn influenced the activity of specific microbial functional groups in the biofilm. The biofilm in MBBR2 was thicker and consequently nitrogen removal by denitrification was much higher. Lower temperature did not affect negatively the reactor performance in MBBR2.

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Effect of increasing organic loading rates on the performance of moving-bed biofilm reactors filled with different support media: Assessing the activity of suspended and attached biomass fractions

Cited by 105 publications

References 34 publications

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Sustained organic loading disturbance favors nitrite accumulation in bioreactors with variable resistance, recovery and resilience of nitrification and nitrifiers

Effect of slow biodegradable substrate addition on biofilm structure and reactor performance in two MBBRs filled with different support media

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