The presence of organic matter during autotrophic nitrogen removal: Problem or opportunity?

Giustinianovich, Elisa; Campos, J. L.; Roeckel, Marlene

doi:10.1016/j.seppur.2016.04.012

Cited by 47 publications

(12 citation statements)

References 56 publications

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“…(4) Organic matter can inhibit the entire process because of the fast development of heterotrophic bacteria (HB), which competes for oxygen with aerAOB and for living space with anAOB. (5) Finally, different environmental conditions such as temperature, concentrations of free nitrous acid and free ammonia control the process efficiency [8,37].…”

Section: Partial Nitrification and Anammox Processmentioning

confidence: 99%

“…Moreover, HB outcompete aerAOB and anAOB for oxygen and nitrite, respectively [67,68]. Nevertheless, if suitable operational conditions and inlet COD biodegradable /N ratios are provided, balanced activities among aerAOB, anAOB and HB can be achieved maintaining a high nitrogen removal efficiency [37]. Stoichiometrically, coupled reactions of partial nitrification and Anammox are capable of removing maximum of 89% of ammonium, leaving the remaining 11% of nitrogen in the form of nitrate.…”

Section: Environmental Conditionsmentioning

confidence: 99%

“…Generally, the inlet COD/N ratio reported in the literature takes into account the total COD; however, only the biodegradable fraction of organic matter should be counted because it is the available substrate for heterotrophic growth. Most reported SNAD process working at COD biodegradable /N ratios lower than 0.7 have shown good performances [37].…”

Section: Environmental Conditionsmentioning

confidence: 99%

“…In addition, the growth of denitrifying bacteria over the granular biomass should be avoided in order to increase the process efficiency. This was successfully accomplished by using a HRT larger than the inverse of the specific growth rate of the heterotrophic bacteria, about 4 h to prevent forming granules and to promote its free floc state [37].…”

Section: Removal Of Organic Matter and Nitrogen Species (Remon)mentioning

confidence: 99%

See 3 more Smart Citations

Innovative Nitrogen and Carbon Removal

Roeckel¹,

ArriagadaGajardo²,

Guzmán‐Fierro³

2017

Nitrification and Denitrification

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The aerobic systems have been the most widely biological treatment used for municipal and industrial wastewater but show serious problem with sludge sedimentation, high energy demand and microbial inhibition. On the other hand, the anaerobic digestion (AD) of wastewater is considered the best alternative to remove the organic compounds and to recover energy via methane production. Nevertheless, AD has a problem: the treatment of industrial wastewater with high organic nitrogen content reaches high free ammonia (NH 3) concentrations due to the protein degradation. NH 3 inhibits the methanogenic process and is toxic to the environment, and then, it must be removed before its final disposition. Several physicochemical processes have been evaluated for the recovery or/and treatment of ammonium from wastewater. The most frequent treatments are gas stripping and magnesium ammonium phosphate precipitation. These methods are effective, but they are very expensive compared to biological treatments. Moreover, these techniques usually require more power consumption than the biological process. The technologies based on partial nitrification and Anammox (PN-A) are the ones with better performance. Thus, this chapter mainly focuses on biological processes based on AD, denitrification and PN-A for the removal of carbon and nitrogen from industrial wastewater with recovery of energy and water.

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Section: Partial Nitrification and Anammox Processmentioning

confidence: 99%

Section: Environmental Conditionsmentioning

confidence: 99%

Section: Environmental Conditionsmentioning

confidence: 99%

Section: Removal Of Organic Matter and Nitrogen Species (Remon)mentioning

confidence: 99%

See 2 more Smart Citations

Innovative Nitrogen and Carbon Removal

Roeckel¹,

ArriagadaGajardo²,

Guzmán‐Fierro³

2017

Nitrification and Denitrification

View full text Add to dashboard Cite

show abstract

“…Another issue to consider is the presence of organic matter in excess in the wastewater that drives the heterotrophic denitrifiers development, which compete with the anammox bacteria for the nitrite [18]. For this reason, a prior stage for organic matter removal, known as A-stage, is required to favor the autotrophic route and to improve the energy efficiency of the WWTP [19].…”

Section: Introductionmentioning

confidence: 99%

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Pedrouso

Aiartza

Morales³

et al. 2018

Separation and Purification Technology

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A single stage partial nitritation and anammox granular pilot scale reactor (600 L) was operated to treat primary settled sewage in an urban wastewater treatment plant. The fed wastewater contained low total nitrogen concentrations of 6-25 mg TN/L and the system operated without temperature control ranging from 18 to 12 ºC. A control strategy, based on the pH value, was applied to stop the aeration supply. The pH setpoint was fixed at 6.0 and allowed obtaining a total nitrogen removal efficiency approximately of 50% treating a load of 67 mg TN/(L•d) without the addition of any chemicals. Although nitrite oxidizing bacteria were present in the inoculated sludge, when the pH-based control was implemented (day 30) the ammonium oxidation was favored compared to the nitrite oxidation activity. Then, the system operated stable the rest of the operational period (days 30-94) despite the presence of organic matter in the wastewater and the high variability of nitrogen load and temperature during the

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Biological nitrification in the presence of sulfide and organic matter: effect of zeolite on the process in a batch system

Huiliñir

Medina

Montalvo

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUNDEven though the nitrification process is inhibited in the presence of sulfide and organic matter, few efforts have been reported to overcome this weakness. The present work has the goal of determining the effect of zeolite (2.5, 5, 10 and 15 g L‐1) as an improver of the nitrification process in the presence of sulfide and organic matter in a batch system.RESULTSThe inhibitory effect of both sulfide and organic matter on the nitrification process was decreased by 53% when using zeolite, with the best results at a zeolite concentration of 15 g L‐1. No total ammonia nitrogen (TAN) adsorption on the zeolite was observed under these conditions, with TAN removal taking place mainly by biological oxidation. Specific nitrate production rate increased by 37.73% compared with the control. Sulfide was oxidized chemically in all the assays, with sulfate as the main product, while COD reduction and VSS production were not affected by zeolite.CONCLUSIONSZeolite can be used to improve nitrification in batch systems in the presence of sulfur and organic matter, obtaining a faster TAN removal rate and higher specific nitrate production compared with the controls. © 2018 Society of Chemical Industry

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The presence of organic matter during autotrophic nitrogen removal: Problem or opportunity?

Cited by 47 publications

References 56 publications

Innovative Nitrogen and Carbon Removal

Innovative Nitrogen and Carbon Removal

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Biological nitrification in the presence of sulfide and organic matter: effect of zeolite on the process in a batch system

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