Influence of biomass acclimation on the performance of a partial nitritation-anammox reactor treating industrial saline effluents

Giustinianovich, Elisa; Campos, J. L.; Roeckel, Marlene; Estrada, Alejandro J.; Mosquera-Corral, Anuska; Río, Ángeles Val del

doi:10.1016/j.chemosphere.2017.11.146

Cited by 47 publications

(11 citation statements)

References 37 publications

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“…In addition, nitrite reductase is more sensitive than nitrate reductase to environment changes [57], thus leading to NO 2 − -N accumulation. Table S2 compares the NH 4 + -N removal efficiency by salinity injection [19,34,48,[58][59][60][61][62][63]. [48].…”

Section: Reactor Performancementioning

confidence: 99%

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

Kim

Ahn

2019

Environmental Engineering Research

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This study investigated the biological treatment of high-salinity wastewater using aerobic granular sludge (AGS). The removal performance, AGS characteristics, and microbial community were examined under salinity conditions ranging from 0.5 to 3.0 wt.%. When the salinity was increased, the removal efficiency of the chemical oxygen demand did not change substantially. The mean removal efficiency of NH4+-N ranged from 43.7 to 72.6% during the operation period. As for the concentration of extracellular polymeric substances (EPS), the polysaccharide/protein (PS/PN) ratio increased from 0.37 to 0.57. The concentrations of the mixed liquor suspended solid (MLSS) and mixed liquor volatile suspended solid (MLVSS) were 4,560 and 3,170 mg/L, respectively, in the end phase, and the MLVSS/MLSS ratio decreased from 0.81 to 0.69. The sludge volume index (SVI30) decreased linearly from 88 to 58 mL/g. In the microbial community analysis, Nitrosomonas species accounted for 22.9% of the total bacteria in the initial phase, whereas Halomonas accounted for 43.2% in the end phase. Hence, the gradually increased salinity appears to facilitate the dominance of halophilic microorganisms in the long-term operation of an AGS-based biological treatment system and the stable retention of AGS.

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Section: Reactor Performancementioning

confidence: 99%

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

Kim

Ahn

2019

Environmental Engineering Research

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“…During partial nitritation half of the ammonia is oxidized to nitrite and then nitrite is produced and the remaining ammonia are mainly converted to N 2 under anoxic conditions by anammox bacteria. Therefore, in this case, NOB activity inhibition by salinity is desirable since this population competes for NO 2 − with anammox bacteria and causes a deterioration of the nitrogen removal efficiency (Giustinianovich et al, 2018). This strategy to inhibit NOB activity could be especially useful in partial nitritation/anammox systems operated at both low nitrogen concentration and temperature (She et al, 2016), since these operational conditions favour the proliferation of NOB over AOB which causes the loss of their operational stability (Gonzalez-Silva et al, 2016;Pedrouso et al, 2017).…”

Section: Nitrogen Removalmentioning

confidence: 99%

“…Moreover, this gradual acclimation of biomass to salt is not a useful strategy for situations, such as seawater infiltrations in coastal urban wastewater treatment plants (WWTPs) (Flood & Cahoon, 2011) and dealing with industrial wastewater (e.g. wastewater from canneries (Val del Río et al, 2018) or chemical industries (Múñoz-Sierra et al, 2018)), where salt concentration suffers sudden large fluctuations that make bacterial communities, especially those with a slow growth rate, unable to adapt . Even halophilic microorganisms are not able to manage these sudden fluctuations, especially sudden decreases in salt concentrations (Mcadam & Judd, 2008).…”

Section: Introductionmentioning

confidence: 99%

Salinity effects on biological treatments

2021

Treatment and Valorisation of Saline Wastewater: Principles and Practice

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High salinity environments can cause the denaturation of microbial enzymes and the destruction of the cell structure. In order to withstand these effects, microorganisms are able to develop mechanisms to both maintain the osmotic pressure balance inside the cells with the bulk liquid and retain water. Organic matter and nitrogen can be removed from high salinity effluents by means of biological processes, once microorganisms are previously adapted to the salt presence, but phosphorus removal efficiency decreases notably under saline conditions, even applying long acclimation periods or using a marine inoculum. Sudden fluctuations of wastewater salt concentration are the worst scenario for biological treatment systems since they cause the loss of pollutant removal efficiency that cannot be avoided even using halophilic microorganisms.

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“…86 Salt-tolerant microorganisms can be obtained by high salinity acclimation or directly from the ocean. For example, Giustinianovich et al 43 found that the activity of anammox was inversely proportional to the salt concentration in the treatment of canned sh wastewater. When the concentration of NaCl increased from 1.75 to 18 g L À1 , the activity of anammox decreased by 94%, while the coupling nitrogen removal rate of anaerobic ammonia nitrogen was reduced to 30%.…”

Section: Salt Inhibitionmentioning

confidence: 99%