Filterability in a submerged anaerobic membrane bioreactor

Spagni, Alessandro; Casu, Stefania; Crispino, N.A.; Farina, Roberto; Mattioli, Davide

doi:10.1016/j.desal.2008.11.042

Cited by 54 publications

(26 citation statements)

References 22 publications

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“…The maximum flux of AnFB-MBR achieved was higher than those between 5 and 10 L m −2 h −1 observed in anaerobic membrane bioreactors (Ho and Sung 2010;Spagni et al 2010) but lower than those typically reported in aerobic MBRs, being between 20 and 25 L m −2 h −1 (Judd 2002). Anaerobic membrane bioreactors have potential for energy-efficient treatment of wastewater treatment, membrane fouling being a major hurdle to application (Kim et al 2011).…”

Section: Discussionmentioning

confidence: 96%

Denitrification of groundwater using a sulfur-oxidizing autotrophic denitrifying anaerobic fluidized-bed MBR: performance and bacterial community structure

Zhang

et al. 2014

Appl Microbiol Biotechnol

109

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This paper investigates a novel sulfur-oxidizing autotrophic denitrifying anaerobic fluidized bed membrane bioreactor (AnFB-MBR) that has the potential to overcome the limitations of conventional sulfur-oxidizing autotrophic denitrification systems. The AnFB-MBR produced consistent high-quality product water when fed by a synthetic groundwater with NO . Successful membrane cleaning was practiced with cleaning cycles of 35-81 days, which had no obvious effect on the AnFB-MBR performance. The 15 N-tracer analyses elucidated that nitrogen was converted into 15 N 2 -N and 15 N-biomass accounting for 88.1-93.1 % and 6.4-11.6 % of the total nitrogen produced, respectively. Only 0.3-0.5 % of removed nitrogen was in form of 15 N 2 O-N in sulfur-oxidizing autotrophic denitrification process, reducing potential risks of a significant amount of N 2 O emissions. The sulfur-oxidizing autotrophic denitrifying bacterial consortium was composed mainly of bacteria from Proteobacteria, Chlorobi, and Chloroflexi phyla, with genera Thiobacillus, Sulfurimonas, and Ignavibacteriales dominating the consortium. The pyrosequencing assays also suggested that the stable microbial communities corresponded to the elevated performance of the AnFB-MBR. Overall, this research described relatively high nitrate removal, acceptable flux, indicating future potential for the technology in practice.

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Section: Discussionmentioning

confidence: 96%

Denitrification of groundwater using a sulfur-oxidizing autotrophic denitrifying anaerobic fluidized-bed MBR: performance and bacterial community structure

Zhang

et al. 2014

Appl Microbiol Biotechnol

109

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“…After this, due to a high increase in TMP, [7] sludge was extracted to control the total suspended solids (TSS) and TMP. Thereafter, the solids retention time (SRT) was controlled at approximately 50 d.…”

Section: Methodsmentioning

confidence: 99%

“…[9] The aim of this study was to evaluate the applicability of the ADM1 to a submerged AMBR (SAMBR) treating simulated industrial wastewater and applying a wide range of organic loading rates. This study follows two previous studies in which sludge filterability [7] and reactor performances [28] were described in detail.…”

Section: Introductionmentioning

confidence: 99%

“…[2] In fact, although some studies have demonstrated that anaerobic MBRs (AMBRs) can achieve removal efficiencies similar to aerobic processes, [6] data about membrane permeability are still contradictory. [7,8] However, AMBRs have recently received a great deal of attention from researchers since anaerobic processes provide several advantages compared to aerobic ones, mainly owing to the energy balance achieved by biogas production and to lower sludge production. [9] Mathematical modelling of wastewater treatment processes have been greatly improved over the last two decades and, today, models are largely applied in supporting design and management.…”

Section: Introductionmentioning

confidence: 99%

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Modelling wastewater treatment in a submerged anaerobic membrane bioreactor

Spagni

Ferraris

Casu

2015

Journal of Environmental Science and Health, Part A

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Mathematical modelling has been widely applied to membrane bioreactor (MBRs) processes. However, to date, very few studies have reported on the application of the anaerobic digestion model N.1 (ADM1) to anaerobic membrane processes. The aim of this study was to evaluate the applicability of the ADM1 to a submerged anaerobic MBR (SAMBR) treating simulated industrial wastewater composed of cheese whey and sucrose. This study demonstrated that the biological processes involved in SAMBRs can be modelled by using the ADM1. Moreover, the results showed that very few modifications of the parameters describing the ADM1 were required to reasonably fit the experimental data. In particular, adaptation to the specific conditions of the coefficients describing the wastewater characterisation and the reduction of the hydrolysis rate of particulate carbohydrate (khyd,ch) from 0.25 d(-1) (as suggested by the ADM1 for high-rate mesophilic reactors) to 0.13 d(-1) were required to fit the experimental data.

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“…On the other hand, submerged membrane bioreactors are less energy intense, but require larger membrane surface area to ensure high permeate fluxes, easy cleaning in comparison to their external loop counterparts (Bakonyi et al, 2014). The internal looped SAMBR has many advantage over UASBr and ASPs, viz: a) achieving high quality permeate retaining maximum suspended solids that can convert particulate COD (COD P ) to soluble COD (COD S ) for enriched biogas production and eliminating the need for secondary clarifier, b) operating the reactors with an increased level of biomass (12-20 g.L À1 ) (Spagni et al, 2009), c) high substrate to biomass (Food to microorganism) ratio in the reactor (Mahendran et al, 2011), d) efficient gas, liquid and solids (GLS) separation (Bakonyi et al, 2014) and f) high substrate to bacterial contact without any sludge gradient through mixing of SAMBR by self-synthesized and stored biogas (Smith et al, 2013;Lin et al, 2010;Jeison and Lier, 2006) as a biogas mixing and dispersion/agitation arrangements. Consequently, many researchers have demonstrated SAMBR as an efficient treatment for low and high strength sewage and industrial wastewaters Gao et al, 2011;Xu et al, 2011;Lindmark et al, 2011;Zayen et al, 2010;Saddoud et al, 2007).…”

Section: Introductionmentioning

confidence: 99%