Feasibility of nitrification/denitrification in a sequencing batch biofilm reactor with liquid circulation applied to post-treatment

Canto, Catarina Simone Andrade do; Rodrigues, José Alberto Domingues; Ratusznei, Suzana Maria; Zaiat, Marcelo; Foresti, Eugênio

doi:10.1016/j.biortech.2006.12.040

Cited by 59 publications

(12 citation statements)

References 10 publications

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“…Some researchers have studied conventional biological nitrogen removal and enhanced biological phosphate removal (EBPR) in SBBR [16][17][18]. Also a few researchers have investigated SND in SBBR, mainly in DO, pH and carbon source [7,19,20]. However, in this experiment SBBR was used to enhance biological nitrogen removal by SND via nitrite and the objectives of this study were to: (1) determine the optimal aeration time under different temperatures, (2) examine the effects of different temperature on the TN removal rate and nitrite accumulation ratio and (3) develop process control for a SND via nitrite process using measured DO and pH.…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature on simultaneous nitrification and denitrification via nitrite in a sequencing batch biofilm reactor

Zhang

Wei

Ke-fang

et al. 2008

Bioprocess Biosyst Eng

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A laboratory scale experiment was described in this paper to enhance biological nitrogen removal by simultaneous nitrification and denitrification (SND) via nitrite with a sequencing batch biofilm reactor (SBBR). Under conditions of total nitrogen (TN) about 30 mg/L and pH ranged 7.15-7.62, synthetic wastewater was cyclically operated within the reactor for 110 days. Optimal operation conditions were established to obtain consistently high TN removal rate and nitrite accumulation ratio, which included an optimal temperature of 31 degrees C and an aeration time of 5 h under the air flow of 50 L/h. Stable nitrite accumulation could be realized under different temperatures and the nitrite accumulation ratio increased with an increase of temperature from 15 to 35 degrees C. The highest TN removal rate (91.9%) was at 31 degrees C with DO ranged 3-4 mg/L. Process control could be achieved by observing changes in DO and pH to judge the end-point of oxidation of ammonia and SND.

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Section: Introductionmentioning

confidence: 99%

Effects of temperature on simultaneous nitrification and denitrification via nitrite in a sequencing batch biofilm reactor

Zhang

Wei

Ke-fang

et al. 2008

Bioprocess Biosyst Eng

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“…For example, natural lake reed biofilms are reported to produce N 2 or N 2 O (28). Furthermore, microbial biofilms are utilized in wastewater treatment and other industrial processes to convert soluble material into gaseous material, such as the conversion of nitrate into N 2 or N 2 O by denitrification (2,21,30). Previous studies of biofilm architecture have reported correlations between metabolic substrates and biofilm architecture (11,24,27), and another study showed the importance of biofilm structures in the distribution of dissolved gases (4).…”

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confidence: 99%

Development of a Novel Biofilm Continuous Culture Method for Simultaneous Assessment of Architecture and Gaseous Metabolite Production

Yawata

Nomura

Uchiyama

2008

Appl Environ Microbiol

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The way that gaseous metabolite production changes along with biofilm architecture development is poorly understood. To address this question, we developed a novel flow reactor biofilm culture method that allows for simultaneous assessment of gaseous metabolite production and architecture visualization. In this report, we establish the utility of this method using denitrification by Pseudomonas aeruginosa biofilms as a model system. Using this method, we were able to collect and analyze gaseous metabolites produced by denitrification and also visualize biofilm architecture in a nondestructive manner. Thus, we propose that this novel method is a powerful tool to investigate potential relationships between biofilm architecture and the gas-producing metabolic activity of biofilms, providing new insights into biofilm ecology.It is known that environmental biofilms often produce gaseous metabolites. For example, natural lake reed biofilms are reported to produce N 2 or N 2 O (28). Furthermore, microbial biofilms are utilized in wastewater treatment and other industrial processes to convert soluble material into gaseous material, such as the conversion of nitrate into N 2 or N 2 O by denitrification (2,21,30). Previous studies of biofilm architecture have reported correlations between metabolic substrates and biofilm architecture (11,24,27), and another study showed the importance of biofilm structures in the distribution of dissolved gases (4). However, such correlations between biofilm architecture and gaseous metabolite production remain poorly understood.If one were able to show simultaneously occurring changes in architecture and gaseous metabolite production, the existence of a correlation between biofilm architecture and gaseous metabolite production would be indicated. To date, the analysis of gaseous metabolite production by biofilms has mainly been performed using test tubes or flasks sealed with butyl rubber stoppers (28). These airtight containers allow for collection of gaseous metabolites and are suitable for batch culture experiments. However, there are currently no nondestructive methods to simultaneously allow for both biofilm visualization and gaseous metabolite analysis. Such a method would provide information on how gaseous metabolite production activity changes along with biofilm development.The flow reactor method (15, 18), combined with confocal laser scanning microscopy (CLSM), is preferred in studies of biofilm architecture and development. Both electron microscopy and CLSM are often used in visualizing biofilms (12); however, electron microscopy requires dehydration (and therefore termination of biofilm growth), which in some cases distorts or damages bacterial cells (7). In contrast, CLSM can be used to visualize the three-dimensional architecture of living biofilms and can be applied to the flow reactor method while maintaining continuous culture (15,18). If collection of gaseous metabolites is achieved in a flow reactor system, both biofilm visualization and gaseous metabolite analysis can...

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“…Andrade do Canto et al [67] investigated the biological removal of ammonium nitrogen from synthetic wastewater by the simultaneous nitrification/denitrification (SND) process, using a sequencing batch biofilm reactor (SBBR). This process was potentially viable in post-treatment of wastewater containing ammonium nitrogen.…”

Section: Sequencing Batch Biofilm Reactor (Sbbr)mentioning

confidence: 99%

Biofilm Fixed Film Systems

Gullicks

Hasan

Das

et al. 2011

Water

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The work reviewed here was published between 2008 and 2010 and describes research that involved aerobic and anoxic biofilm treatment of water pollutants. Biofilm denitrification systems are covered when appropriate. References catalogued here are divided on the basis of fundamental research area or reactor types. Fundamental research into biofilms is presented in two sections, Biofilm Measurement and Characterization and Growth and Modeling. The reactor types covered are: trickling filters, rotating biological contactors, fluidized bed bioreactors, submerged bed biofilm reactors, biological granular activated carbon, membrane bioreactors, and immobilized cell reactors. Innovative reactors, not easily classified, are then presented, followed by a section on biofilms on sand, soil and sediment.

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Feasibility of nitrification/denitrification in a sequencing batch biofilm reactor with liquid circulation applied to post-treatment

Cited by 59 publications

References 10 publications

Effects of temperature on simultaneous nitrification and denitrification via nitrite in a sequencing batch biofilm reactor

Effects of temperature on simultaneous nitrification and denitrification via nitrite in a sequencing batch biofilm reactor

Development of a Novel Biofilm Continuous Culture Method for Simultaneous Assessment of Architecture and Gaseous Metabolite Production

Biofilm Fixed Film Systems

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