Nitrifying biofilm acclimation to free ammonia in submerged biofilters. Start-up influence

Villaverde, S.; Fdz‐Polanco, F.; Garcı́a, Pilar Garcı́a

doi:10.1016/s0043-1354(99)00175-x

Cited by 143 publications

(80 citation statements)

References 14 publications

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“…Also Kone and Behrens (1981) state that nitrite accumulation is triggered by discontinuous operation such as batch reactors. For example, start-up in batch resulted in 65% nitrite accumulation, while only an accumulation of 30% was noticed for start-up in continuous flow mode (Villaverde et al 2000). According to Fdz-Polanco et al (1996) plug flow hydrodynamics in a nitrifying submerged biofilter will favour nitrite accumulation in situations of FA inhibition.…”

Section: Operation Of Reactor or Treatment Plantmentioning

confidence: 99%

“…Whatever the temperature, Mauret et al (1996) observed a transient nitrite build-up of roughly 50% of the initial ammonia concentration for threshold concentrations of FA of 8.91 mg N L −1 . Villaverde et al (2000) and Rols et al (1994) remark that the inhibition phenomenon is specific and depends both upon the concentration of nitrifying organisms Villaverde et al (1997) as upon the threshold concentration (on volume basis) of FA causing inhibition. In doing so, Rols et al (1994) established the threshold of inhibition of NOB between 0.5 and 3 mg NH 3 -N mg −1 viable NOB biomass.…”

Section: Ammonium (Nh + 4 ) or Free Ammonia (Nh 3 )mentioning

confidence: 99%

“…Also Rols et al (1994) believe that the history of the sludge (in their case enrichment in the presence of high FA concentrations) or the operation of the reactor are factors altering the growth dynamics of NOB towards acclimatisation to NH 3 . Results of experiments with submerged biofilters (Villaverde et al 2000) also suggest that NOB develop the capability to resist higher concentrations of FA after exposure for long periods of time to constant FA concentrations: the threshold value of 0.2 mg NH 3 -N g −1 VAS (Volatile Attached Solids) after 2 months of operation increased to 0.5-0.7 mg NH 3 -N g −1 VAS after 6 months, for constant VAS concentration and NH 3 loads (66.4 mg NH 3 -N d −1 = 2 g NH + 4 -N d −1 ). Moreover, the inhibitory effect of FA on NOB is attenuated when the temperature is within the optimum range for NOB growth, i.e., 10-20 • C (Balmelle et al 1992).…”

Section: Ammonium (Nh + 4 ) or Free Ammonia (Nh 3 )mentioning

confidence: 99%

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Origin, causes and effects of increased nitrite concentrations in aquatic environments

Philips

Laanbroek

Verstraete

2002

Rev Environ Sci Biotechnol

313

198

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Literature frequently mentions increased nitrite concentrations along with its inhibitory effect towards bacteria and aquatic life. Nitrite accumulation has been studied for decades, and although numerous causal factors have already been commented on in literature, the mechanism of nitrite accumulation is not always clear. From the broad range of parameters and environmental factors reviewed in this paper, it is obvious that the causes and consequences of nitrite accumulation are not yet completely understood. Among others, pH, dissolved oxygen, volatile fatty acids, phosphate and reactor operation have been found to play a role in nitrite accumulation, which results from differential inhibition or disruption of the linkage of the different steps in both nitrification and denitrification. In the case of nitrification, this differential inhibition could lead to the displacement or unlinking of the ammonia oxidisers and nitrite oxidisers. In this paper, the idea is formulated that the nitrifier population forms a role model for the total microbial community. Increased nitrite concentrations would in this aspect not only signal a disruption of nitrifiers, but possibly also of the total configuration of the microbial community.Abbreviations: AMO -Ammonia mono-oxygenase; Anammox -Anaerobic ammonium oxidation; AOBAmmonia-oxidising bacteria; ATP -Adenosine triphosphate; COD -Chemical oxygen demand; DNRA -Dissimilatory nitrate reduction to ammonium; DO -Dissolved oxygen; EU -European union; FA -Free ammonia; F/M -Food to micro-organism ratio; FNA -Free nitrous acid; HAO -Hydroxylamine oxidoreductase; HRTHydraulic residence time; NDBEPR -Enhanced biological phosphate removal with nitrification and denitrification; NO -Nitric oxide; NOB -Nitrite-oxidising bacteria; NOR -Nitrite oxidoreductase; OLAND -Oxygen limited autotrophic nitrification denitrification; RBC -Rotating biological contactor; Sharon -Single reactor high activity ammonia removal over nitrite; SRT -Sludge residence time; TAN -Total ammoniacal nitrogen; TOC -Total organic carbon; VAS -Volatile attached solids

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Section: Operation Of Reactor or Treatment Plantmentioning

confidence: 99%

Section: Ammonium (Nh + 4 ) or Free Ammonia (Nh 3 )mentioning

confidence: 99%

Section: Ammonium (Nh + 4 ) or Free Ammonia (Nh 3 )mentioning

confidence: 99%

See 1 more Smart Citation

Origin, causes and effects of increased nitrite concentrations in aquatic environments

Philips

Laanbroek

Verstraete

2002

Rev Environ Sci Biotechnol

313

198

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show abstract

“…Although the FA concentration was higher than the NOB inhibitory value of 0.1-1.0 mg NH 3 /L indicated by Anthonisen et al (1976), nitrite did not accumulate. Chung et al (2005) reported that DO increases NOB activity, and Villaverde et al (2000) observed that NOB gradually adapt to FA inhibition. FA levels of 10-15 mgNH 3 /L are needed to maintain highly efficient AOB and eliminate NOB for stable shortcut nitrification (Chung et al 2005;Chen et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Response of nitrite accumulation and microbial community to free ammonia and dissolved oxygen treatment of high ammonium wastewater

Sui

Liu

Zhang

et al. 2016

Appl Microbiol Biotechnol

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The effects of free ammonia (FA) and dissolved oxygen (DO) on nitrite accumulation in the treatment of high ammonium wastewater and on the evolution of the microbial community were investigated. Under high DO conditions (3.75±0.49 mg/L), FA as high as 10.61±2.89 mg NH 3 /L maintained stable nitrite accumulation rate (NAR) of 84 % with NH 4 + -N load of 2.05 kg N/(m 3 day) at sludge retention time (SRT) of 15-18 days. After 56 days of operation, Proteobacteria and Nitrosomonas were the dominant phylum and genus, respectively; Nitrosomonas increased from 21.14 to 54.57 %. By contrast, under relative low DO and low FA, nitrite-oxidizing bacteria (NOB) were nearly eliminated (NOB/AOB of 0; ammonium-oxidizing bacteria (AOB)), and NAR of 94 % was achieved with lower NH 4 + -N load of 0.48 kg N/(m 3 day). DO correlated with AOB and NOB abundance, and FA decreased NOB activity and the NOB/AOB ratio. In conclusion, high FA and high DO conditions are optimal for efficient nitrite accumulation.

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“…Villaverde et al (1999) found that the start-up of submerged biofilters treating a medium strength synthetic wastewater (Influent NH4 + -N = 100 mgl -1 ) required 30 to 60 days. Villaverde et al maintained temperature at 25°C and pH at 7.50 during the start-up period.…”

Section: Performance Of Sfbbrsmentioning

confidence: 99%

The Start-Up of Aerated Submerged Fixed-Bed Biofilm Reactors for Steady State Nitrification

Elawwad¹,

Abdel-Halim²,

Koeser³

2012

IJEPR

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Nitrifying biofilm acclimation to free ammonia in submerged biofilters. Start-up influence

Cited by 143 publications

References 14 publications

Origin, causes and effects of increased nitrite concentrations in aquatic environments

Origin, causes and effects of increased nitrite concentrations in aquatic environments

Response of nitrite accumulation and microbial community to free ammonia and dissolved oxygen treatment of high ammonium wastewater

The Start-Up of Aerated Submerged Fixed-Bed Biofilm Reactors for Steady State Nitrification

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