Seawater denitrification in a closed mesocosm by a submerged moving bed biofilm reactor

Labelle, Marc-André; Juteau, Pierre; Jolicœur, Mario; Villemur, Richard; Parent, Serge; Comeau, Yves

doi:10.1016/j.watres.2005.06.001

Cited by 45 publications

(19 citation statements)

References 22 publications

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“…The source of this in the MP plant has not yet been clearly established, although seawater infiltration is suspected in this system, as indicated by elevated conductivity levels. Seawater is known to contain appreciable concentrations of sulfate, and high concentrations have been found in an MBBR system treating waste from a marine aquarium (20).…”

Section: Discussionmentioning

confidence: 99%

Microbial Community Composition and Dynamics of Moving Bed Biofilm Reactor Systems Treating Municipal Sewage

Biswas

Turner

2012

Appl Environ Microbiol

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Moving bed biofilm reactor (MBBR) systems are increasingly used for municipal and industrial wastewater treatment, yet in contrast to activated sludge (AS) systems, little is known about their constituent microbial communities. This study investigated the community composition of two municipal MBBR wastewater treatment plants (WWTPs) in Wellington, New Zealand. Monthly samples comprising biofilm and suspended biomass were collected over a 12-month period. Bacterial and archaeal community composition was determined using a full-cycle community approach, including analysis of 16S rRNA gene libraries, fluorescence in situ hybridization (FISH) and automated ribosomal intergenic spacer analysis (ARISA). Differences in microbial community structure and abundance were observed between the two WWTPs and between biofilm and suspended biomass. Biofilms from both plants were dominated by Clostridia and sulfate-reducing members of the Deltaproteobacteria (SRBs). FISH analyses indicated morphological differences in the Deltaproteobacteria detected at the two plants and also revealed distinctive clustering between SRBs and members of the Methanosarcinales, which were the only Archaea detected and were present in low abundance (<5%). Biovolume estimates of the SRBs were higher in biofilm samples from one of the WWTPs which receives both domestic and industrial waste and is influenced by seawater infiltration. The suspended communities from both plants were diverse and dominated by aerobic members of the Gammaproteobacteria and Betaproteobacteria. This study represents the first detailed analysis of microbial communities in full-scale MBBR systems and indicates that this process selects for distinctive biofilm and planktonic communities, both of which differ from those found in conventional AS systems.T he moving bed biofilm reactor (MBBR) system was developed in the late 1980s for the treatment of domestic and industrial wastewaters. These systems are now operating in more than 22 countries (including New Zealand) and range from large-to small-scale wastewater treatment plants (WWTPs) (35). The MBBR process combines features of both fixed-growth and activated sludge (AS) systems in that the microbial community is largely retained within the reactor as a biofilm on suspended carriers, with a smaller planktonic fraction being present in suspension as free-floating cells or small flocs. MBBR technology offers a number of advantages over conventional technologies for treating waste, including a high effluent quality, no bulking problems, and lower cost. Other advantages of fixed biofilm growth include the decoupling of biomass retention from hydraulic retention time leading to longer sludge ages and low waste sludge volumes (5, 37).Studies on the microbial community composition of conventional activated sludge systems indicate that the community is typically dominated by aerobic or facultatively anaerobic heterotrophic bacteria belonging to the Betaproteobacteria (41). It is unclear whether similar communities are found in MBBR pr...

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Section: Discussionmentioning

confidence: 99%

Microbial Community Composition and Dynamics of Moving Bed Biofilm Reactor Systems Treating Municipal Sewage

Biswas

Turner

2012

Appl Environ Microbiol

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“…The operation of three Norwegian MBBR nitrogen removal systems showed that the nitrification and denitrification rates reach 1.2 g NH 4 + -N m −2 day −1 and 3.5 g NO 3 − -N equiv.m −2 day −1 even under 11°C (Odegaard 2006). For the treatment of NO 3 − -N-polluted seawater, 17.7± 1.4 g N m −2 day −1 denitrification rate was obtained by denitrification MBBR (Labelle et al 2005).…”

Section: Introductionmentioning

confidence: 96%

“…Denitrification processes are frequently used for NO 3 − -N removal (Labelle et al 2005;Liu 1997;Mases et al 2010; Responsible editor: Angeles Blanco * Haiyan Wang wanghy@craes.org.cn 1 Odegaard 2006). Moving bed biofilm reactor (MBBR) was developed in 1980s (European Patent no.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the MBBR denitrification carriers for advanced nitrogen removal of wastewater treatment plant effluent

Yuan

Wang

Hang

et al. 2015

Environ Sci Pollut Res

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The moving bed biofilm reactors (MBBRs) were used to remove the residual NO3(-)-N of wastewater treatment plant (WWTP) effluent, and the MBBR carriers for denitrification were compared. The results showed that high denitrification efficiency can be achieved with polyethylene, polypropylene, polyurethane foam, and haydite carriers under following conditions: 7.2 to 8.0 pH, 24 to 26 °C temperature, 12 h hydraulic retention time (HRT), and 25.5 mg L(-1) external methanol dosage, while the WWTP effluent total nitrogen (TN) was between 2.6 and 15.4 mg L(-1) and NO3(-)-N was between 0.2 and 12.6 mg L(-1). The MBBR filled with polyethylene carriers had higher TN and NO3(-)-N removal rate (44.9 ± 19.1 and 83.4 ± 13.0%, respectively) than those with other carriers. The minimum effluent TN and NO3(-)-N of polyethylene MBBR were 1.6 and 0.1 mg L(-1), respectively, and the maximum denitrification rate reached 23.0 g m(-2) day(-1). When chemical oxygen demand (COD)/TN ratio dropped from 6 to 4, the NO3(-)- N and TN removal efficiency decreased significantly in all reactors except for that filled with polyethylene, which indicated that the polyethylene MBBR can resist influent fluctuation much better. The three-dimensional excitation-emission matrix analysis showed that all the influent and effluent of MBBRs contain soluble microbial products (SMPs)-like organics and biochemical oxygen demand (BOD), which can be removed better by MBBRs filled with haydite and polyethylene carriers. The nitrous oxide reductase (nosZ)-based terminal restriction fragment length polymorphism (T-RFLP) analysis suggested that the dominant bacteria in polyethylene MBBR are the key denitrificans.

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“…Up to now, these systems had to regularly change or dilute the water causing highly polluted effluents. Denitrifying biological phosphorus removal (Bio-PN) therefore appears to be an interesting nutrient removal process that could be applied to these systems without producing excessive sludge (Rogalla et al 2006 (Labbé et al 2003;Labelle et al 2005;Dupla et al 2006). This MBBR was modified in the present study to carry out Bio-PN.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of biological phosphorus removal in a sequencing moving bed biofilm reactor in seawater

Vallet

Labelle

Rieger

et al. 2009

Water Science and Technology

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A new process was developed to achieve denitrifying biological phosphorus removal in wastewaters containing high levels of nitrate and phosphate with a low level of organic matter. This could particularly be useful in recirculating systems such as aquariums or fish farms to prevent accumulation of nitrate and phosphates and to avoid regular cost extensive and polluting water replacement. Phosphorus (P) was removed from the influent in a sequencing moving bed biofilm reactor, stored in the attached biomass and then cyclically removed from the biomass by filling the reactor with anaerobic water from a stock tank. Phosphate was accumulated in the stock tank which allowed for use as fertilizer. The feasibility of the experimental design was demonstrated by using the activated sludge model No. 3 (ASM3) complemented by the EAWAG Bio-P module implemented in the WEST simulation software. A pilot scale experiment was conducted in two identical reactors in two runs: one to treat water from a marine mesocosm, the other to treat a synthetic freshwater influent. No biological phosphorus removal was achieved during the seawater run. During the freshwater run, average P removal efficiency was 20%, of which 80% was attributed to biological removal and 20% to chemical precipitation. The absence of efficiency in seawater was attributed to the high concentration of calcium.

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Seawater denitrification in a closed mesocosm by a submerged moving bed biofilm reactor

Cited by 45 publications

References 22 publications

Microbial Community Composition and Dynamics of Moving Bed Biofilm Reactor Systems Treating Municipal Sewage

Microbial Community Composition and Dynamics of Moving Bed Biofilm Reactor Systems Treating Municipal Sewage

Comparison of the MBBR denitrification carriers for advanced nitrogen removal of wastewater treatment plant effluent

Inhibition of biological phosphorus removal in a sequencing moving bed biofilm reactor in seawater

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