Nitrogen Removal Characteristics and Biofilm Analysis of a Membrane-Aerated Biofilm Reactor Applicable to High-Strength Nitrogenous Wastewater Treatment.

Terada, Akihiko; Hibiya, Kazuaki; Nagai, Jun; Tsuneda, Satoshi; Hirata, A.

doi:10.1263/jbb.95.170

Cited by 35 publications

(47 citation statements)

References 31 publications

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“…In contrast, most wastewater treatment bioreactors are operated such that the in situ concentrations of COD and ammonia are low. Numerous previous studies, however, have demonstrated that AOB and denitrifying bacteria can grow under these conditions [11,18,23]. Our study is also limited by the destructive nature of biofilm removal and slicing, which limited our ability to perform replicate analyses of our biofilms.…”

Section: Discussionmentioning

confidence: 96%

“…Simultaneously, the region of the biofilm furthest from the membrane should favor denitrification (i.e., rich in biodegradable organic compounds plus the nitrate produced via nitrification, but poor in oxygen). Indeed, numerous studies have reported the concomitant removal of both carbonaceous and nitrogenous pollutants in a single-stage MABR [11,12,19,23].…”

Section: Introductionmentioning

confidence: 99%

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The effects of organic carbon, ammoniacal-nitrogen, and oxygen partial pressure on the stratification of membrane-aerated biofilms

LaPara

Cole

Shanahan

et al. 2005

J IND MICROBIOL BIOTECHNOL

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The purpose of this study was to examine the effects of different nutrient (carbon, nitrogen, oxygen) concentrations on the microbial activity and community structure in membrane-aerated biofilms (MABs). MABs were grown under well-defined conditions of fluid flow, substrate concentration, and membrane oxygen partial pressure. Biofilms were then removed and thin-sliced using a cryostat/microtome parallel to the membrane. Individual slices were analyzed for changes with depth in biomass density, respiratory activity, and the population densities of ammonia-oxidizing and denitrifying bacteria populations. Oxygen-sensing microelectrodes were used to determine the depth of oxygen penetration into each biofilm. Our results demonstrated that ammonia-oxidizing bacteria grow near the membrane, while denitrifying bacteria grow a substantial distance from the membrane. However, nitrifying and denitrifying bacteria did not grow simultaneously when organic concentrations became too high or ammonia concentrations became too low. In conclusion, membrane-aerated biofilms exhibit substantial stratification with respect to community structure and activity. A fundamental understanding of the factors that control this stratification will help optimize the performance of full-scale membrane-aerated biofilm reactors for wastewater treatment.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

The effects of organic carbon, ammoniacal-nitrogen, and oxygen partial pressure on the stratification of membrane-aerated biofilms

LaPara

Cole

Shanahan

et al. 2005

J IND MICROBIOL BIOTECHNOL

View full text Add to dashboard Cite

show abstract

“…Another reported case is a treatment plant for sludge rejection water with influent NH 4 -N of 1,200 mg /L on average in a suspended biomass process (Mulder et al 2001). A higher influent NH 4 -N concentration case has been reported by Terada et al (2003), who studied a pilot-scale membrane-aerated biofilm process with an NH 4 -N concentration of 3,000 mg/L from swine wastewater. It seems that biological nitrification-denitrification treatment is applied and economical on a technical scale with wastewaters of NH 4 -N concentration much below 2,000 mg/L and abundant C/N ratio, e.g., above 7.0 (Carrera et al 2004).…”

Section: Introductionmentioning

confidence: 94%

Treatment of High Ammonium–Nitrogen Wastewater from Composting Facilities by Air Stripping and Catalytic Oxidation

Wang¹,

Pelkonen²,

Kotro³

2009

Water Air Soil Pollut

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Composting municipal wastewater sludge may generate composting wastewater (acid washer water and tunnel wastewater) with high ammonium-nitrogen (NH 4 -N) concentration; this kind of wastewater is usually generated in a rather small daily amount. A procedure of air stripping with catalytic oxidation was developed and tested with pilot-scale and full-scale units for synthetic disposal of the high NH 4 -N wastewaters from composting facilities. In air stripping, around 90% NH 4 -N removal efficiency was reliably achieved with a maximum of 98%. A model to describe the stripping process efficiency was constructed, which can be used for process optimization. After catalytic oxidation, the concentrations in the outlet gas were acceptable for NH 3 , NO X , NO 2 , and N 2 O, but the NH 3 and N 2 O concentrations limited the feasible loading range. The treatment costs were estimated in detail. The results indicate that air stripping with the catalytic oxidation process can be applied for wastewater treatment in composting facilities.

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“…Since no bubbles are formed, high oxygen utilization efficiency is achievable [6,7]. Moreover, gas stripping of volatile substances can be prevented, whereas in conventional reactor the reactants and products might be lost along with the escaping foam [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Brindle et al [6] used MABR to treat synthetic inorganic wastewater and obtained above 98% ammonium-N (NH þ 4 -N) removal. Terada et al [7] utilized a surface-modified polyethylene membrane and total organic carbon (TOC) and nitrogen removal reached 96 and 83% at removal rates of 5.76 g-C/m 2 per day and 4.48 g-N/ m 2 per day, respectively. Biomass' control was needed for stable operation.…”

Section: Introductionmentioning

confidence: 99%

Carbon membrane-aerated biofilm reactor for synthetic wastewater treatment

Liu

Yang

Wang

et al. 2007

Bioprocess Biosyst Eng

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A carbon membrane-aerated biofilm reactor (CMABR) was developed to treat synthetic wastewater. Such membrane exhibited a high degree of adhesion and good permeability. Continuous experiments showed that COD and NH4(+)-N removal efficiency were 90 +/- 2 and 92 +/- 4% at removal rates of 35.6 +/- 3.8 g COD/m2 per day and 9.3 +/- 0.6 g NH4(+)-N/ m2 per day, respectively. After 108 days, effluent total nitrogen (TN) kept at 35 +/- 4 mg/L when influent NH4(+)-N increased to 144-164 mg/L and removal efficiency of TN reached 78 +/- 3%. Furthermore, Stoichiometric analysis revealed that 70-90% of oxygen supplied was consumed by nitrifier. Scanning electron microscopic (SEM) images and component analysis of penetrating fluid revealed that extracellular polymeric substance (EPS) adhered to pore and that alkaline washing was an effective method to remove them. The study demonstrated that carbon membrane could be used as effective gas-permeable membrane in MABR for wastewater treatment.

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Nitrogen Removal Characteristics and Biofilm Analysis of a Membrane-Aerated Biofilm Reactor Applicable to High-Strength Nitrogenous Wastewater Treatment.

Cited by 35 publications

References 31 publications

The effects of organic carbon, ammoniacal-nitrogen, and oxygen partial pressure on the stratification of membrane-aerated biofilms

The effects of organic carbon, ammoniacal-nitrogen, and oxygen partial pressure on the stratification of membrane-aerated biofilms

Treatment of High Ammonium–Nitrogen Wastewater from Composting Facilities by Air Stripping and Catalytic Oxidation

Carbon membrane-aerated biofilm reactor for synthetic wastewater treatment

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