Integration of the Anammox process to the rejection water and main stream lines of WWTPs

Morales, Nicolás; Río, Ángeles Val del; Vázquez-Padín, José Ramón; Méndez, R.; Mosquera-Corral, Anuska; Campos, José Luis

doi:10.1016/j.chemosphere.2015.03.058

Cited by 93 publications

(40 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Anammox are chemolithoautotropic bacteria that can provide advantages over the conventional nitrification-denitrification N-removal process due to no need for an external electron donor and lowered aeration requirements (60% saving) 1 . Therefore, the application of the anammox process has become widely developed for N-removal in both side-and main-streams of wastewater treatment plants [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Nitrate Reverses Severe Nitrite Inhibition of Anaerobic Ammonium Oxidation (Anammox) Activity in Continuously-Fed Bioreactors

Sierra-Álvarez

Vilcherrez

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Nitrate Reverses Severe Nitrite Inhibition of Anaerobic Ammonium Oxidation (Anammox) Activity in Continuously-Fed Bioreactors

Sierra-Álvarez

Vilcherrez

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

“…If the nitrite route is applied, approximately 40% less organic matter is consumed for heterotrophic denitrification [2] or, preferably, no organic matter is needed if it is autotrophically removed via the anammox process. Furthermore, 25% less energy is required for aeration [3]. Thus, multiple efforts are focused on the nitritation process consisting on the ammonium oxidation to nitrite by the ammonium oxidizing bacteria (AOB).…”

Section: Introductionmentioning

confidence: 99%

Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions

Pedrouso

Morales²,

Vázquez-Padín³

et al. 2017

Separation and Purification Technology

Self Cite

View full text Add to dashboard Cite

The application of autotrophic nitrogen removal processes in the main line of wastewater treatment plants will contribute to achieve its self-energy-sufficiency. However, the effective suppression of nitrite oxidizing bacteria (NOB) activity at the conditions of low temperature and low ammonium concentration (mainstream conditions) was identified as one of the main bottlenecks. In this study, stable partial nitritation at 16 ºC and 50 mg NH4 + -N/L was achieved maintaining inside the reactor free nitrous acid (FNA) concentrations inhibitory for NOB (> 0.02 mg HNO2-N/L), without dissolved oxygen concentration control. The FNA inhibitory concentration was generated by the partial nitritation process, and its stimulation was studied with two different inhibitors: sodium azide and nitrite. The microbiological analysis revealed that, throughout the operational period with inhibitory FNA levels, the NOB populations (dominated by Nitrospira) were effectively washed out from the reactor. This is an advantage that allowed maintaining a good stability of the process, even when the FNA concentration was not enough to inhibit the NOB, taking about 40 days to develop significant activity. The observed delay on the NOB development is expected to enable the establishment of corrective actions to avoid the partial nitritation destabilization. The use of the FNA to achieve a stable partial nitritation process is recommended to profit from the natural pH decrease associated to the nitritation process and from its favoured accumulation at low temperatures as those from the mainstream. In this research study an analysis about the influence of ammonium and alkalinity concentrations was also performed to know in which scenarios the FNA inhibitory concentration can be achieved.

show abstract

“…This allows the conversion of the organic carbon into methane which can be used as energy supply for the wastewater treatment process. There is a whole set of partial nitritation/anammox (PN/A) processes developed [4][5][6]. Implementation of the anammox process is mostly based on biofilm or granular sludge processes because through this method a high biomass concentration and therewith a high volumetric treatment capacity can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Deterioration of the anammox process at decreasing temperatures and long SRTs

Hoekstra

Weerd

Kleerebezem

et al. 2017

Environmental Technology

View full text Add to dashboard Cite

The implementation of autotrophic nitrogen removal in the mainstream of a municipal wastewater treatment plant is currently pursued. Among the crucial unknown factors are the kinetic properties of anaerobic ammonium oxidising (anammox) bacteria at low temperatures. In this study we investigated the adaptation of a fast-growing anammox culture to a lower temperature. In a membrane bioreactor a highly enriched anammox community was obtained at 30°C, 25°C and 20°C. This culture was exposed to long-and short-term temperature changes. In short-term experiments the decrease in biomass-specific activity due to decrease in temperature can be described by an activation energy of 64 ± 28 kJ mol −1 . Prolonged cultivation (months) implies that cultivation at low temperatures resulted in deterioration of biomass-specific activity (Ea The reason for the deterioration of the system was related to the required long SRT in the system. The long SRT leads to an increase of non-active and non-anammox cells in the reactor, thereby decreasing the biomass-specific activity.ARTICLE HISTORY

show abstract

Integration of the Anammox process to the rejection water and main stream lines of WWTPs

Cited by 93 publications

References 52 publications

Nitrate Reverses Severe Nitrite Inhibition of Anaerobic Ammonium Oxidation (Anammox) Activity in Continuously-Fed Bioreactors

Nitrate Reverses Severe Nitrite Inhibition of Anaerobic Ammonium Oxidation (Anammox) Activity in Continuously-Fed Bioreactors

Nitrite oxidizing bacteria suppression based on in-situ free nitrous acid production at mainstream conditions

Deterioration of the anammox process at decreasing temperatures and long SRTs

Contact Info

Product

Resources

About